Atrial Flutter: Rapid, irregular atrial contractions caused by a block of electrical impulse conduction in the right atrium and a reentrant wave front traveling up the inter-atrial septum and down the right atrial free wall or vice versa. Unlike ATRIAL FIBRILLATION which is caused by abnormal impulse generation, typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES).Catheter Ablation: Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias.Atrial Fibrillation: Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation.Tricuspid Valve: The valve consisting of three cusps situated between the right atrium and right ventricle of the heart.Electrocardiography: Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.Propafenone: An antiarrhythmia agent that is particularly effective in ventricular arrhythmias. It also has weak beta-blocking activity.Pericarditis: Inflammation of the PERICARDIUM from various origins, such as infection, neoplasm, autoimmune process, injuries, or drug-induced. Pericarditis usually leads to PERICARDIAL EFFUSION, or CONSTRICTIVE PERICARDITIS.Anti-Arrhythmia Agents: Agents used for the treatment or prevention of cardiac arrhythmias. They may affect the polarization-repolarization phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibers. Anti-arrhythmia agents are often classed into four main groups according to their mechanism of action: sodium channel blockade, beta-adrenergic blockade, repolarization prolongation, or calcium channel blockade.Heart Atria: The chambers of the heart, to which the BLOOD returns from the circulation.Heart Block: Impaired conduction of cardiac impulse that can occur anywhere along the conduction pathway, such as between the SINOATRIAL NODE and the right atrium (SA block) or between atria and ventricles (AV block). Heart blocks can be classified by the duration, frequency, or completeness of conduction block. Reversibility depends on the degree of structural or functional defects.Electrophysiologic Techniques, Cardiac: Methods to induce and measure electrical activities at specific sites in the heart to diagnose and treat problems with the heart's electrical system.Procainamide: A class Ia antiarrhythmic drug that is structurally-related to PROCAINE.Electric Countershock: An electrical current applied to the HEART to terminate a disturbance of its rhythm, ARRHYTHMIAS, CARDIAC. (Stedman, 25th ed)Heart Conduction System: An impulse-conducting system composed of modified cardiac muscle, having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart.Cardiac Pacing, Artificial: Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.Body Surface Potential Mapping: Recording of regional electrophysiological information by analysis of surface potentials to give a complete picture of the effects of the currents from the heart on the body surface. It has been applied to the diagnosis of old inferior myocardial infarction, localization of the bypass pathway in Wolff-Parkinson-White syndrome, recognition of ventricular hypertrophy, estimation of the size of a myocardial infarct, and the effects of different interventions designed to reduce infarct size. The limiting factor at present is the complexity of the recording and analysis, which requires 100 or more electrodes, sophisticated instrumentation, and dedicated personnel. (Braunwald, Heart Disease, 4th ed)Atrial Function, Right: The hemodynamic and electrophysiological action of the RIGHT ATRIUM.Tachycardia, Supraventricular: A generic expression for any tachycardia that originates above the BUNDLE OF HIS.Vena Cava, Inferior: The venous trunk which receives blood from the lower extremities and from the pelvic and abdominal organs.Disopyramide: A class I anti-arrhythmic agent (one that interferes directly with the depolarization of the cardiac membrane and thus serves as a membrane-stabilizing agent) with a depressant action on the heart similar to that of guanidine. It also possesses some anticholinergic and local anesthetic properties.Flecainide: A potent anti-arrhythmia agent, effective in a wide range of ventricular and atrial ARRHYTHMIAS and TACHYCARDIAS.Amiodarone: An antianginal and class III antiarrhythmic drug. It increases the duration of ventricular and atrial muscle action by inhibiting POTASSIUM CHANNELS and VOLTAGE-GATED SODIUM CHANNELS. There is a resulting decrease in heart rate and in vascular resistance.Atrial Function: The hemodynamic and electrophysiological action of the HEART ATRIA.Tachycardia: Abnormally rapid heartbeat, usually with a HEART RATE above 100 beats per minute for adults. Tachycardia accompanied by disturbance in the cardiac depolarization (cardiac arrhythmia) is called tachyarrhythmia.Refractory Period, Electrophysiological: The period of time following the triggering of an ACTION POTENTIAL when the CELL MEMBRANE has changed to an unexcitable state and is gradually restored to the resting (excitable) state. During the absolute refractory period no other stimulus can trigger a response. This is followed by the relative refractory period during which the cell gradually becomes more excitable and the stronger impulse that is required to illicit a response gradually lessens to that required during the resting state.Atrial Premature Complexes: A type of cardiac arrhythmia with premature atrial contractions or beats caused by signals originating from ectopic atrial sites. The ectopic signals may or may not conduct to the HEART VENTRICLES. Atrial premature complexes are characterized by premature P waves on ECG which are different in configuration from the P waves generated by the normal pacemaker complex in the SINOATRIAL NODE.Tachycardia, Ectopic Atrial: Abnormally rapid heartbeats originating from one or more automatic foci (nonsinus pacemakers) in the HEART ATRIUM but away from the SINOATRIAL NODE. Unlike the reentry mechanism, automatic tachycardia speeds up and slows down gradually. The episode is characterized by a HEART RATE between 135 to less than 200 beats per minute and lasting 30 seconds or longer.Tachycardia, Paroxysmal: Abnormally rapid heartbeats with sudden onset and cessation.Hydrops Fetalis: Abnormal accumulation of serous fluid in two or more fetal compartments, such as SKIN; PLEURA; PERICARDIUM; PLACENTA; PERITONEUM; AMNIOTIC FLUID. General fetal EDEMA may be of non-immunologic origin, or of immunologic origin as in the case of ERYTHROBLASTOSIS FETALIS.Cryosurgery: The use of freezing as a special surgical technique to destroy or excise tissue.Pulmonary Veins: The veins that return the oxygenated blood from the lungs to the left atrium of the heart.Electrophysiology: The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.Recurrence: The return of a sign, symptom, or disease after a remission.Coronary Sinus: A short vein that collects about two thirds of the venous blood from the MYOCARDIUM and drains into the RIGHT ATRIUM. Coronary sinus, normally located between the LEFT ATRIUM and LEFT VENTRICLE on the posterior surface of the heart, can serve as an anatomical reference for cardiac procedures.Fluoroscopy: Production of an image when x-rays strike a fluorescent screen.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Atrioventricular Node: A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.Arrhythmias, Cardiac: Any disturbances of the normal rhythmic beating of the heart or MYOCARDIAL CONTRACTION. Cardiac arrhythmias can be classified by the abnormalities in HEART RATE, disorders of electrical impulse generation, or impulse conduction.Follow-Up Studies: Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.Cardiac Catheters: Catheters inserted into various locations within the heart for diagnostic or therapeutic purposes.Butylscopolammonium Bromide: Antimuscarinic quaternary ammonium derivative of scopolamine used to treat cramps in gastrointestinal, urinary, uterine, and biliary tracts, and to facilitate radiologic visualization of the gastrointestinal tract.Atrial Function, Left: The hemodynamic and electrophysiological action of the LEFT ATRIUM.Sick Sinus Syndrome: A condition caused by dysfunctions related to the SINOATRIAL NODE including impulse generation (CARDIAC SINUS ARREST) and impulse conduction (SINOATRIAL EXIT BLOCK). It is characterized by persistent BRADYCARDIA, chronic ATRIAL FIBRILLATION, and failure to resume sinus rhythm following CARDIOVERSION. This syndrome can be congenital or acquired, particularly after surgical correction for heart defects.Tachycardia, Sinoatrial Nodal Reentry: Abnormally rapid heartbeats caused by reentry circuit in or around the SINOATRIAL NODE. It is characterized by sudden onset and offset episodes of tachycardia with a HEART RATE of 100-150 beats per minute. The P wave is identical to the sinus P wave but with a longer PR interval.Fetal Diseases: Pathophysiological conditions of the FETUS in the UTERUS. Some fetal diseases may be treated with FETAL THERAPIES.Echocardiography, Transesophageal: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues using a transducer placed in the esophagus.Electrocardiography, Ambulatory: Method in which prolonged electrocardiographic recordings are made on a portable tape recorder (Holter-type system) or solid-state device ("real-time" system), while the patient undergoes normal daily activities. It is useful in the diagnosis and management of intermittent cardiac arrhythmias and transient myocardial ischemia.Venae Cavae: The inferior and superior venae cavae.Edrophonium: A rapid-onset, short-acting cholinesterase inhibitor used in cardiac arrhythmias and in the diagnosis of myasthenia gravis. It has also been used as an antidote to curare principles.Sotalol: An adrenergic beta-antagonist that is used in the treatment of life-threatening arrhythmias.Prospective Studies: Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.Bundle of His: Small band of specialized CARDIAC MUSCLE fibers that originates in the ATRIOVENTRICULAR NODE and extends into the membranous part of the interventricular septum. The bundle of His, consisting of the left and the right bundle branches, conducts the electrical impulses to the HEART VENTRICLES in generation of MYOCARDIAL CONTRACTION.Dogs: The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)Heart Diseases: Pathological conditions involving the HEART including its structural and functional abnormalities.Atrial Appendage: Ear-shaped appendage of either atrium of the heart. (Dorland, 28th ed)Digoxin: A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666)Time Factors: Elements of limited time intervals, contributing to particular results or situations.Tachycardia, Atrioventricular Nodal Reentry: Abnormally rapid heartbeats caused by reentry of atrial impulse into the dual (fast and slow) pathways of ATRIOVENTRICULAR NODE. The common type involves a blocked atrial impulse in the slow pathway which reenters the fast pathway in a retrograde direction and simultaneously conducts to the atria and the ventricles leading to rapid HEART RATE of 150-250 beats per minute.Dysgeusia: A condition characterized by alterations of the sense of taste which may range from mild to severe, including gross distortions of taste quality.Atrial Septum: The thin membrane-like muscular structure separating the right and the left upper chambers (HEART ATRIA) of a heart.Heart Defects, Congenital: Developmental abnormalities involving structures of the heart. These defects are present at birth but may be discovered later in life.Sulfonamides: A group of compounds that contain the structure SO2NH2.Arrhythmia, Sinus: Irregular HEART RATE caused by abnormal function of the SINOATRIAL NODE. It is characterized by a greater than 10% change between the maximum and the minimum sinus cycle length or 120 milliseconds.Postoperative Complications: Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery.Surgery, Computer-Assisted: Surgical procedures conducted with the aid of computers. This is most frequently used in orthopedic and laparoscopic surgery for implant placement and instrument guidance. Image-guided surgery interactively combines prior CT scans or MRI images with real-time video.Cardiac Catheterization: Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.Azygos Vein: A vein which arises from the right ascending lumbar vein or the vena cava, enters the thorax through the aortic orifice in the diaphragm, and terminates in the superior vena cava.Pacemaker, Artificial: A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external).Echocardiography: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.Retrospective Studies: Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.

Superiority of ibutilide (a new class III agent) over DL-sotalol in converting atrial flutter and atrial fibrillation. The Ibutilide/Sotalol Comparator Study Group. (1/582)

OBJECTIVE: To compare the efficacy and safety of a single dose of ibutilide, a new class III antiarrhythmic drug, with that of DL-sotalol in terminating chronic atrial fibrillation or flutter in haemodynamically stable patients. DESIGN: Double blind, randomised study. SETTING: 43 European hospitals. PATIENTS: 308 patients (mean age 60 years, 70% men, 48% with heart disease) with sustained atrial fibrillation (n = 251) or atrial flutter (n = 57) (duration three hours to 45 days) were randomised to three groups to receive a 10 minute infusion of 1 mg ibutilide (n = 99), 2 mg ibutilide (n = 106), or 1.5 mg/kg DL-sotalol (n = 103). Infusion was discontinued at termination of the arrhythmia. MAIN OUTCOME MEASURE: Successful conversion of atrial fibrillation or flutter, defined as termination of arrhythmia within one hour of treatment. RESULTS: Both drugs were more effective against atrial flutter than against atrial fibrillation. Ibutilide was superior to DL-sotalol for treating atrial flutter (70% and 56% v 19%), while the high dose of ibutilide was more effective for treating atrial fibrillation than DL-sotalol (44% v 11%) and the lower dose of ibutilide (44% v 20%, p < 0.01). The mean (SD) time to arrhythmia termination was 13 (7) minutes with 2 mg ibutilide, 19 (15) minutes with 1 mg ibutilide, and 25 (17) minutes with DL-sotalol. In all patients, the duration of arrhythmia before treatment was a predictor of arrhythmia termination, although this was less obvious in the group that received 2 mg ibutilide. This dose converted almost 48% of atrial fibrillation that was present for more than 30 days. Concomitant use of digitalis or nifedipine and prolongation of the QTc interval were not predictive of arrhythmia termination. Bradycardia (6.5%) and hypotension (3.7%) were more common side effects with DL-sotalol. Of 211 patients given ibutilide, two (0.9%) who received the higher dose developed polymorphic ventricular tachycardia, one of whom required direct current cardioversion. CONCLUSION: Ibutilide (given in 1 or 2 mg doses over 10 minutes) is highly effective for rapidly terminating persistent atrial fibrillation or atrial flutter. This new class III drug, under monitored conditions, is a potential alternative to currently available cardioversion options.  (+info)

Atrial arrhythmia after surgical closure of atrial septal defects in adults. (2/582)

BACKGROUND: Atrial flutter and atrial fibrillation are causes of morbidity in adults with an atrial septal defect. In this study, we attempted to identify risk factors for atrial flutter and fibrillation both before and after the surgical closure of an atrial septal defect. METHODS: We searched for preoperative and postoperative atrial flutter or fibrillation in 213 adult patients (82 men and 131 women) who underwent surgical closure of atrial septal defects because of symptoms, a substantial left-to-right shunt (ratio of pulmonary to systemic blood flow, >1.5:1), or both at Toronto Hospital between 1986 and 1997. RESULTS: Forty patients (19 percent) had sustained atrial flutter or fibrillation before surgery. As compared with the patients who did not have atrial flutter or fibrillation before surgery, those who did were older (59+/-11 vs. 37+/-13 years, P<0.001) and had higher mean pulmonary arterial pressures (25.0+/-9.7 vs. 19.7+/-8.2 mm Hg, P=0.001). There were no perioperative deaths. After a mean follow-up period of 3.8+/-2.5 years, 24 of the 40 patients (60 percent) continued to have atrial flutter or fibrillation. The mean age of these patients was greater than that of the 16 who converted to sinus rhythm (P=0.02). New-onset atrial flutter or atrial fibrillation was more likely to have developed at follow-up in patients who were older than 40 years at the time of surgery than in those who were 40 or younger (5 of 67 vs. 0 of 106, P=0.008). Late events (those occurring more than one month after surgery) included stroke in six patients (all but one with atrial flutter or fibrillation, one of whom died) and death from noncardiac causes in two patients. Multivariate analysis showed that older age (>40 years) at the time of surgery (P=0.001), the presence of preoperative atrial flutter or fibrillation (P<0.001), and the presence of postoperative atrial flutter or fibrillation or junctional rhythm (P=0.02) were predictive of late postoperative atrial flutter or fibrillation. CONCLUSIONS: The risk of atrial flutter or atrial fibrillation in adults with atrial septal defects is related to the age at the time of surgical repair and the pulmonary arterial pressure. To reduce the morbidity associated with atrial flutter and fibrillation, the timely closure of atrial septal defects is warranted.  (+info)

Effect of right atrial isthmus ablation on the occurrence of atrial fibrillation: observations in four patient groups having type I atrial flutter with or without associated atrial fibrillation. (3/582)

BACKGROUND: The goal of this study was to test the hypothesis that the occurrence of atrial fibrillation (AF), in at least some patients with coexisting type I atrial flutter (AFL), is based on macro-reentry around the tricuspid valve orifice, including the right atrial (RA) isthmus, by evaluation of AF recurrences after successful ablation of AFL. METHODS AND RESULTS: Eighty-two consecutive patients with type I AFL, with or without concomitant AF, underwent radiofrequency ablation (RFA) of the RA isthmus by an anatomical approach. The results were analyzed in 4 groups of patients: group 1 (only AFL; 29 patients), group 2 (AFL >AF; 22 patients), group 3 (AF >AFL; 15 patients), and group 4 (developing AFL while receiving class IC antiarrhythmic drug therapy for AF, the "class IC atrial flutter"; 16 patients). In all groups, RFA of type I AFL was performed with a high (>/=93%) procedural success rate. In group 1, only 2 patients (8%) had AF after (18+/-14 months) AFL ablation. These figures were 38% (20+/-14 months) and 86% (13+/-8 months) in groups 2 and 3, respectively. Group 4 patients (4+/-2 months) had a 73% freedom of AF recurrences with continuation of the class IC agent. CONCLUSIONS: The low incidence of new AF during long-term follow-up after RFA of type I AFL makes it unlikely that radiofrequency lesions promote the development of AF. The impact of isthmus ablation on AF recurrences differs according to the clinically predominant atrial arrhythmia and suggests a possible role of the RA isthmus in the occurrence of AF in some patients. Ablation of class IC atrial flutter in patients with therapy-resistant AF is a novel approach to management of this patient subset. Careful classification of AF patients plays a role in the selection of the site of ablation therapy.  (+info)

The cost-effectiveness of ibutilide versus electrical cardioversion in the conversion of atrial fibrillation and flutter to normal rhythm. (4/582)

Atrial fibrillation and atrial flutter are cardiac rhythm disorders that are often symptomatic and may interfere with the heart's function, limiting its effectiveness. These arrhythmias are responsible for a large number of hospitalizations at a significant cost to the healthcare system. Electrical cardioversion (EC) is the most common nonpharmacologic intervention used to convert atrial fibrillation and atrial flutter to normal rhythm. Electrical cardioversion is highly successful in converting patients to normal rhythm; however, it is more traumatic and resource intensive than pharmacologic treatment. Recently, a new rapid-acting drug, ibutilide, was approved for the conversion of atrial fibrillation and atrial flutter. Ibutilide is administered through intravenous infusion and does not require anesthetization of the patient, as is required for EC. A decision-tree model was developed to estimate the cost-effectiveness of ibutilide therapy compared with EC therapy. Clinical outcomes were based on a phase III trial of ibutilide, and resource use was based on the literature and physician clinical judgment. A stepped conversion regimen of first-line ibutilide followed by EC for patients who fail to convert is less expensive and has a higher conversion rate than first-line EC. Sensitivity analysis shows that our results are robust to changes in cost and effectiveness estimates.  (+info)

Right atrial flutter due to lower loop reentry: mechanism and anatomic substrates. (5/582)

BACKGROUND: The mechanisms of an atrial flutter (AFL) that is more rapid and at times more irregular than typical AFL are unknown. METHODS AND RESULTS: Twenty-nine patients with AFL were studied. Atrial electrograms were recorded from a 20-pole catheter placed against the tricuspid annulus (TA), with its distal electrodes lateral to the isthmus between the TA and the eustachian ridge (ER), and from the His bundle and coronary sinus catheters. Atrial extrastimuli were delivered in the TA-ER isthmus during typical AFL. Episodes of a right atrial flutter rhythm that was different from typical AFL were induced in 3 patients and occurred spontaneously in 3 patients. This sustained AFL, designated as lower-loop reentry (LLR), involved the lower right atrium (RA), as manifested by early breakthrough in the lower RA, wave-front collision in the high lateral RA or septum, and conduction through the TA-ER isthmus. Linear ablation resulting in bidirectional conduction block in the TA-ER isthmus terminated spontaneous LLR in 3 patients and rendered LLR noninducible in all patients. The cycle length of LLR was shorter than that of typical AFL (217+/-32 versus 272+/-40 ms, P<0. 01). Alternating LLR and typical AFL in 1 patient resulted in cycle length oscillation. CONCLUSIONS: LLR is a subtype of right atrial flutter and depends on conduction through the TA-ER isthmus.  (+info)

Mapping of atrial activation with a noncontact, multielectrode catheter in dogs. (6/582)

BACKGROUND: Endocardial mapping of sustained arrhythmias has traditionally been performed with a roving diagnostic catheter. Although this approach is adequate for many tachyarrhythmias, it has limitations. The purpose of this study was to evaluate a novel noncontact mapping system for assessing atrial tachyarrhythmias. METHODS AND RESULTS: The mapping system consists of a 9F multielectrode-array balloon catheter that has 64 active electrodes and ring electrodes for emitting a locator signal. The locator signal was used to construct a 3-dimensional right atrial map; it was independently validated and was highly accurate. Virtual electrograms were calculated at 3360 endocardial sites in the right atrium. We evaluated right atrial activation by positioning the balloon catheter in the mid right atrium via a femoral venous approach. Experiments were performed on 12 normal mongrel dogs. The mean correlation coefficient between contact and virtual electrograms was 0.80+/-0.12 during sinus rhythm. Fifty episodes of atrial flutter induced in 11 animals were evaluated. In the majority of experiments, complete or almost complete reentrant circuits could be identified within the right atrium. Mean correlation coefficient between virtual and contact electrograms was 0.85+/-0.17 in atrial flutter. One hundred fifty-six episodes of pacing-induced atrial fibrillation were evaluated in 11 animals. Several distinct patterns of right atrial activation were seen, including single-activation wave fronts and multiple simultaneous-activation wave fronts. Mean correlation coefficient between virtual and contact electrograms during atrial fibrillation was 0.81+/-0.18. The accuracy of electrogram reconstruction was lower at sites >4.0 cm from the balloon center and at sites with a high spatial complexity of electrical activation. CONCLUSIONS: This novel noncontact mapping system can evaluate conduction patterns during sinus rhythm, demonstrate reentry during atrial flutter, and describe right atrial activation during atrial fibrillation. The accuracy of electrogram reconstruction was good at sites <4.0 cm from the balloon center, and thus the system has the ability to perform high-resolution multisite mapping of atrial tachyarrhythmias in vivo.  (+info)

Electrophysiological determinant for induction of isthmus dependent counterclockwise and clockwise atrial flutter in humans. (7/582)

OBJECTIVE: To investigate the electrophysiological determinant underlying the electrical induction of counterclockwise and clockwise isthmus dependent atrial flutter. PATIENTS AND METHODS: The isthmus bordered by the inferior vena caval orifice-tricuspid annulus-coronary sinus ostium (IVCO-TA-CSO) has been assumed to be the site of both slow conduction and unidirectional block critical to the initiation of atrial flutter. Trans-isthmus and the global atrial conduction were studied in 25 patients with isthmus dependent atrial flutter (group A) and in 21 patients without atrial flutter (group B), by pacing at the coronary sinus ostium and the low lateral right atrium (LLRA) and mapping with a 20 pole Halo catheter in the right atrium. RESULTS: Mean (SD) fluoroscopic isthmus length between the coronary sinus ostium and LLRA sites was 28.1 (4.0) mm in group A and 28.0 (3.9) mm in group B (p = 0.95), but the trans-isthmus conduction velocity of both directions at various pacing cycle lengths was nearly halved in group A compared with group B (mean 0.39-0.46 m/s v 0.83-0.89 m/s, p < 0.0001). Pacing at coronary sinus ostium directly induced counterclockwise atrial flutter in 14 patients and pacing at LLRA induced clockwise atrial flutter in 11 patients, following abrupt unidirectional trans-isthmus block. Transient atrial tachyarrhythmias preceded the onset of atrial flutter in 10 counterclockwise and six clockwise cases of atrial flutter. None of the group B patients had inducible atrial flutter even in the presence of trans-isthmus block. The intra- and interatrial conduction times, as well as the conduction velocities at the right atrial free wall and the septum, were similar and largely within the normal range in both groups. CONCLUSIONS: Critical slowing of the trans-IVCO-TA-CSO isthmus conduction, but not the unidirectional block or the global atrial performance, is the electrophysiological determinant of the induction of counterclockwise and clockwise isthmus dependent atrial flutter in man.  (+info)

Clinical experience with a novel multielectrode basket catheter in right atrial tachycardias. (8/582)

BACKGROUND: The complexity of atrial tachycardias (ATs) makes the electroanatomic characterization of the arrhythmogenic substrate difficult with conventional mapping techniques. The aim of our study was to evaluate possible advantages of a novel multielectrode basket catheter (MBC) in patients with AT. METHODS AND RESULTS: In 31 patients with AT, an MBC composed of 64 electrodes was deployed in the right atrium (RA). The possibility of deployment, spatial relations between MBC and RA, MBC recording and pacing capabilities, mapping performance, and MBC-guided ablation were assessed. MBC deployment was possible in all 31 patients. The MBC was left in the RA for 175+/-44 minutes. Stable bipolar electrograms were recorded in 88+/-4% of electrodes. Pacing from bipoles was possible in 64+/-5% of electrode pairs. The earliest activity intervals, in relation to P-wave onset, measured from the MBC and standard roving catheters were 41+/-9 and 46+/-6 ms, respectively (P=0.21). Radiofrequency ablation was successful in 15 (94%) of 16 patients in whom it was attempted, including 2 patients with polymorphic right atrial tachycardia (RAT), 2 with RAT-atrial flutter combination, 1 with macroreentrant AT, and 1 with focal origin of atrial fibrillation. CONCLUSIONS: These data demonstrate that MBC can be used safely in patients with right atrial arrhythmias. The simultaneous multielectrode mapping aids in the rapid identification of sites of origin of the AT and facilitates radiofrequency ablation procedures. The technique is especially effective for complex atrial arrhythmias.  (+info)

The macro-reentrant circuit of isthmus-dependent atrial flutter (AFL) is located in the right atrium around the tricuspid annulus. High acute success and low recurrence rate makes isthmus ablation a definitive therapy for patients with only AFL. However, a review of the literature suggests that, different aspects of this macro-reentrant circuit are still not entirely understood, while new information continues to emerge. The aim of this article is to discuss some gaps in our "complete" understanding of isthmus-dependent AFL. Few hypotheses have been stated which are open to investigation. ...
Introduction: Right atrial flutter (AFL) ablation is performed by creating point by point a line of bidirectional conduction block (BDB) across the cavotricuspid isthmus (CVI). The Linear Study evaluates the safety and effectiveness of the linear ablation system (LAS), consisting of a new multi-channel radiofrequency (RF) generator with a new ablation catheter designed to perform linear lesions.. Methods: Linear is a prospective, single center, non-randomized, clinical feasibility study in patients undergoing RF ablation for CTI-dependent right AFL. Transesophageal or intracardiac echocardiography is used to exclude intracardiac thrombus. The study device is a quadripolar catheter (Biosense Webster) with 2 RF electrodes (position 1 and 3, tip and ring) capable of performing bipolar (B) ablation between electrodes or unipolar (U) ablation from either one electrode or simultaneously. Electroanatomical mapping of RA is performed with the CARTO system. The maximum power settings used are 40 W for U ...
Heidbuchel, H.; Anne, W.; Willems, R.; Adams, J.; Van, D.W.rf, F.; Ector, H., 2003: Endurance sports is related to atrial fibrillation development after atrial flutter ablation
Dr. Glenn Brammer, a board-certified cardiologist and electrophysiologist, performed the first atrial flutter ablation in Augusta Healths new Electrophysiology Lab on Oct. 24.
Background: It has been shown that nifekalant, a novel IKr-selective blocking class III agent, effectively suppresses ventricular tachyarrhythmias. However, its electrophysiologic effects on human atria have not been fully evaluated.. Objectives: The purpose of the study is to elucidate the effects of nifekalant on the electrophysiologic properties of the atrium during typical atrial flutter (AFL).. Methods: Thirteen patients with counter-clockwise typical AFL were studied. A 20-pole "halo" catheter was positioned around the tricuspid annulus, and another 3 catheters were positioned at the His bundle site, coronary sinus and lateral portion of the cavotricuspid annulus (CTI), respectively. Atrial activation was also mapped by the non-contact mapping system (EnSite 3000). During AFL, we measured the conduction time from the lateral to septal CTI (IS) and that through the reminder of the right atrium (nIS). Variability during AFL was quantified by the maximum difference in the cycle length (CL) ...
GRÖNEFELD, G. C., WEGENER, F., ISRAEL, C. W., TEUPE, C. and HOHNLOSER, S. H. (2003), Thromboembolic Risk of Patients Referred for Radiofrequency Catheter Ablation of Typical Atrial Flutter Without Prior Appropriate Anticoagulation Therapy. Pacing and Clinical Electrophysiology, 26: 323-327. doi: 10.1046/j.1460-9592.2003.00042.x ...
We present two cases of proarrhythmia after propafenone treatment. In the first case slowing of the flutter cycle length from 205 ms to 290 ms resulted in a change from well tolerated two to one atrioventricular conduction to one to one conduction with hypotension and presyncope. In the second case organization of atrial fibrillation to atypical atrial flutter and use-dependent left bundle branch block resulted in fast broad QRS tachycardia that mimicked ventricular tachycardia ...
BACKGROUND: The clinical yield of cavotricuspid isthmus (CTI) radiofrequency ablation of atrial flutter (AF) is limited by a high incidence of atrial fibrillation (AFib) in the long term. Among other acknowledged variables, the association of obstructive sleep apnea (OSA) could favor incomplete arrhythmia control in this setting. We assessed the impact of CPAP in reducing the occurrence of AFib after CTI ablation.
This is a good example of atrial flutter with variable conduction in a 53-year-old man. He had been treated for a fast rate, and now has a rate of approximately 90 per minute. No other clinical information is available. One of the good teaching points in this ECG is that some leads show P waves (or, in this case, flutter waves) better than others. The diagnosis of atrial flutter can be missed by practitioners utilizing only one or two leads. ...
Atrial flutter and atrial fibrillation are heart-rhythm disorders that trigger palpitations and lightheadedness. While atrial flutter causes a rapid but regular…
Atrial flutter is abnormal heart rhythm or an abnormal heart beat. Atrial Flutter is similar to atrial fibrillation. Information about atrial fibrillation
Atrial flutter is abnormal heart rhythm or an abnormal heartbeat. Atrial Flutter is similar to atrial fibrillation. Information about atrial fibrillation
Atrial flutter is a type of arrhythmia. It causes the heart to beat faster than normal. Atrial flutter can increase the risk for certain serious problems, such as stroke.
Ibutilide and dl-sotalol are methanesulphonilides with class III electrophysiological and antiarrhythmic effects.12-21 Unlike dl-sotalol, ibutilide does not have β blocking activity at the doses used in this study. In canine studies, ibutilide was effective against atrial flutter (0.006 mg/kg),19-21 atrial fibrillation (0.150 mg/kg),20 and the subacute phase of ventricular tachycardias (0.030 mg/kg) after myocardial infarction.18The exact mode of action of ibutilide is a matter of discussion.16 Activation of a slow (Na+) inward current,13 blockade of Ikr,14 15 and/or additional or combined effects15 may explain the class III effect. In contrast, activation of an outward potassium current at higher dosages may explain self limitation in prolongation of the cardiac action potential.13 Ibutilide has not been shown to produce important haemodynamic changes at doses of less than 3 mg/kg. Comparative studies in animals involving single cell preparations and models of ischaemia have shown that ...
This trial compares the safety and effectiveness of catheter ablation for PAF with antiarrhythmic drug therapy. The investigational catheter being studied is the NAVISTAR® THERMOCOOL® irrigated-tip catheter. At the time of this study, the NAVISTAR® THERMOCOOL® catheter was FDA-approved for commercial distribution in the U.S. for treating patients with Type I atrial flutter and drug refractory monomorphic ventricular tachycardia post myocardial infarction. The catheter was approved for use in Europe for endocardial ablation for treating cardiac arrhythmias ...
This trial compares the safety and effectiveness of catheter ablation for PAF with antiarrhythmic drug therapy. The investigational catheter being studied is the NAVISTAR® THERMOCOOL® irrigated-tip catheter. At the time of this study, the NAVISTAR® THERMOCOOL® catheter was FDA-approved for commercial distribution in the U.S. for treating patients with Type I atrial flutter and drug refractory monomorphic ventricular tachycardia post myocardial infarction. The catheter was approved for use in Europe for endocardial ablation for treating cardiac arrhythmias ...
A 47-year-old woman presented with paroxysmal atrial flutter. Echocardiogram and computed tomography with 3-dimensional reconstruction revealed a massive right atrium (RA) with a giant aneurysm of the right atrial appendage and patent foramen ovale (PFO) (A). AO = aorta; RV = right ventricle.. Surgery was performed with a minimally invasive, video-assisted thoracoscopy, cardiopulmonary bypass, and cardioplegic arrest. After peripheral cannulation, the thoracic cavity was entered through a 3-cm inframammary incision in the fourth intercostal space. The right atrium and appendage were grossly enlarged and thinned out with a transition margin to normal atrium circumferentially. The diseased atrium was excised (B), the PFO closed, and a right-sided cryo-maze for atrial flutter ablation was performed (Online Video 1). The patient recovered uneventfully and was discharged after 3 days.. Right atrial aneurysm is a rare anomaly. Indications for resection include atrial arrhythmias or thrombus formation. ...
Srikanth Vallurupalli, MD, and colleagues from the University of Arkansas Medical Sciences, Little Rock, AR presented results at ACC.13, the American College of Cardiologys 62nd Annual Scientific Session, in support of intravenous (IV) magnesium significantly enhancing the efficacy of ibutilide in atrial fibrillation conversion and flutter.
The methodologic limitations of "low density" in vivo mapping in humans, however, should not be underestimated. Though the observation of split potentials associated with an alteration of the activation sequence of the second component strongly suggests conduction block, a marked conduction delay cannot be excluded. Actually, conduction delays have been proved to be the cause of double potentials in different settings (i.e., intrahisian "block"). However, the alteration of the activation sequence of the second component gives further evidence of conduction block and findings from experimental studies with high density epicardial mapping support the interpretation of our observations (15,16,32).. Aside from that, conduction was determined during pacing in the lateral right atrium adjacent to the anterior edge of the CT in patients with documented atrial tachyarrhythmias. Pulse propagation in the opposite direction (from posterior to anterior) or in healthy subjects or after pacing apart from the ...
If your abstract is accepted, you will be expected to prepare a four-page paper for presentation during the conference and publication in the conference proceedings. We welcome and encourage contributions to PhysioNet of software developed during this competition. If you wish to improve your score, you may revise your entry and submit it again for scoring. The number of submissions is limited (you will be allowed six entries, which may be all in one event, or divided between the two events as you wish). If you wish to submit additional entries, the autoscorer will enforce a waiting period, which is 24 hours for the seventh entry and doubles for every subsequent entry. If you have submitted an abstract to Computers in Cardiology 2001 on or before 1 May 2001, you are eligible for awards based on any scores you receive before the challenge deadline of noon GMT on Friday, 21 September 2001. If you have not submitted an abstract on or before 1 May, you may still participate in the challenge as an ...
One could be fooled into thinking this is sinus tachycardia (with a short PR interval) with diffuse ST depression. But close inspection reveals flutter waves. In particular, a totally upright p-wave in V1 is very unusual and should alert you to atrial flutter. The fluttering baseline accounts for the apparent ST depression, although I cannot rule out some amount of true ischemic ST depression ...
Atrial flutter (AFl) is an arrhythmia resulting from reentry in a macroreentrant circuit, most commonly in the right atrium. Typical AFl uses the narrow isthmus of right atrial tissue between the tricuspid valve annulus and the inferior vena cava ori
Atrial flutter (fibrillation) | Radiofrequency ablation (rfa). Cardiology: Treatment in Germany ✈. Prices on BookingHealth.com - booking treatment online
Multaq (dronedarone tablets), an antiarrhythmic, has been made available by Sanofi-aventis for patients with atrial fibrillation (AF) or atrial flutter (AFL).
Atrial flutter is a relatively common supraventricular arrhythmia that can cause unacceptable symptoms and can promote atrial thrombus formation with the potential for systemic embolization. Restoration and maintenance of sinus rhythm improves sympto
A detector for atrial fibrillation and/or atrial flutter comprises an atrial input for receiving an atrial signal representing an intraatrial electrogram or a time course of an intraatrial impedance, a ventricular input for receiving a ventricular event signal comprising information on an occurrence of a cyclically reoccurring ventricular event in chronological association to an atrial signal received via atrial input, an averaging unit adapted to average a plurality of sections of said atrial signal, each section to be considered for averaging starts or ends at a predetermined offset before a ventricular event, and to put out an averaged atrial signal, a peak amplitude determination unit adapted to determine peak-to-peak amplitude of said averaged atrial signal, and threshold comparator adapted to compare peak-to-peak amplitude of averaged atrial signal to predetermined reference value and to generate an AF warning signal if peak-to-peak amplitude of averaged atrial signal is less than predetermined
Electrical system problems of the heart may make the atria beat faster than normal. If the atria beat quickly, but still evenly, it is called atrial flutter. If the atria beat very quickly and unevenly, it is called atrial fibrillation.
Percentage of patients aged 18 years and older with nonvalvular atrial fibrillation (AF) or atrial flutter who were prescribed warfarin OR another FDA-approved oral anticoagulant drug for the prevention of thromboembolism during the measurement period
Atrial flutter is an electrocardiographic descriptor used both specifically and nonspecifically to describe various atrial tachycardias. The term was originally applied to adults with regular atrial depolarizations at a rate of 260-340 beats per minute (bpm).
Atrial flutter (fibrillation) | Pacemaker implantation. Cardiology: Treatment in Winterthur, Switzerland ✈. Prices on BookingHealth.com - booking treatment online!
38yr old male diagnosed by Cardiologist with classic atrial flutter. Had catheter ablation performed. Doc could not quite reproduce flutter during electric study. So he performed the ablation usin...
A previously fit 41-year-old man presented in March 1997 with palpitations and shortness of breath. Initial symptoms consisted of paroxysmal palpitations occurring after exercising; however, over the course of 6 months, he became aware that his pulse was consistently irregular and that even mild exertion made him short of breath. The patient was on no medicines. Coffee, tea and caffeine-containing beverages were only consumed in moderation. He was a life-long non-smoker and consumed approximately 5 units of alcohol per week. His occupation was competitive with a mentally stressful environment; he found his performance was helped by the use of a dietary supplement. Examination was unremarkable apart from an irregularity of the arterial pulse. The patient appeared euthyroid and was normotensive (blood pressure 110/700 mmHg) with no signs of heart failure. An electrocardiogram showed atrial flutter, at a rate of 148 beats/min, with variable block. Haematological and biochemical analyses, including ...
This article discusses atrial flutter with emphasis on ECG diagnosis, clinical features, causes and management. Current guidelines are also presented.
Atrial Flutter, Black Vomit, Sudden Death Symptom Checker: Possible causes include Chronic Alcoholism, Acute Myocardial Infarction, Pulmonary Embolism. Check the full list of possible causes and conditions now! Talk to our Chatbot to narrow down your search.
people with underlying heart or lung disease who experience atrial flutter may have these and other, more significant symptoms: * angina pectoris (chest or heart pains) * feeling faint or light-heade
A clinical electrocardiographic study was performed on 41 patients with atrial flutter. In all patients an underlying cardiac disorder was present or suspected.
Learn more about Atrial Flutter at Regional Medical Center Bayonet Point DefinitionCausesRisk FactorsSymptomsDiagnosisTreatmentPreventionrevision ...
While the management of atrial fibrillation includes anticoagulation, the value of this treatment for atrial flutter is less well established. Seidl and associates conducted a retrospective study to assess the frequency of thromboembolism in patients hospitalized with atrial flutter as the primary rhythm disorder.. A total of 191 patients with chronic or recurrent atrial flutter, defined as organized atrial tachycardia at a rate of 240 or more beats per minute on a 12-lead electrocardiogram, were included in the study. Electrical cardioversion was performed in 138 patients (72.3 percent), catheter ablation was used in 28 patients (14.7 percent), medical cardioversion was used in 19 patients (9.9 percent) and overdrive stimulation was used in six patients (3.1 percent). Warfarin therapy had been administered in 67 of the patients several weeks before and after cardioversion. An additional 72 patients were receiving aspirin.. Acute embolic events within 48 hours of cardioversion were distinguished ...
Radiofrequency energy is used in heart tissue or normal parts to destroy abnormal electrical pathways that are contributing to a cardiac arrhythmia. It is used in recurrent atrial flutter (Afl), atrial fibrillation (AF), supraventricular tachycardia (SVT), atrial tachycardia, Multifocal Atrial Tachycardia (MAT) and some types of ventricular arrhythmia. The energy-emitting probe (electrode) is at the tip of a catheter which is placed into the heart, usually through a vein. This catheter is called the ablator. The practitioner first "maps" an area of the heart to locate the abnormal electrical activity (electrophysiology study) before the responsible tissue is eliminated. Ablation is now the standard treatment for SVT and typical atrial flutter and the technique can also be used in AF, either to block the atrioventricular node after implantation of a pacemaker or to block conduction within the left atrium, especially around the pulmonary veins. In some conditions, especially forms of intra-nodal ...
The heart has 4 chambers. It has 2 upper chambers (atria) and 2 lower chambers (ventricles). Electrical signals regulate the heart beat. The signals also help the atria and ventricles work together in the same rhythm. The blood from the atria is pushed into the ventricles and leaves the heart to circulate to the rest of the body.. Atrial flutter is a type of abnormal fast beating (arrhythmia) in the atria. These fast beats make it difficult for the atria to push all the blood into the ventricles. As a result, the ventricles push less blood through the body. Atrial flutter may be an acute or chronic disorder that comes and goes. Atrial flutter is not usually life-threatening when it is treated. However, it may increase your risk of developing blood clots and a stroke. ...
1. be able to describe the phases of the cardiac action potential and the ionic currents that contribute to the cardiac action potential 2. be able to describe the anatomy and physiology of the components of the cardiac conduction system and describe the basic mechanisms involved in the generation of the normal cardiac rhythm 3. be able to describe the basic mechanisms involved in the pathogenesis of disorders of impulse formation, impulse conduction and cardiac tachyarrhythmias including SVT, atrial fibrillation/flutter, ventricular tachyarrhythmias 4. be able to describe the electrophysiologic abnormalities associated with structural heart disease (including hypertension, myocardial infarction, valvular heart disease, cardiomyopathies, congenital heart disease) that contribute to the substrate for arrhythmias 5. be able to describe the different classes of antiarrhythmic drugs and the mechanism(s) of action of commonly used drugs including lidocaine, flecainide, propafenone, sotalol, ...
Radiofrequency catheter ablation (RFA) is a technique to treat arrhythmia that was pioneered at UCSF Medical Center. It disrupts part of the electrical pathway causing irregular heart rhythms, providing relief for patients who may not respond well to medications, who prefer not to take medications or who cant take medications.. The procedure involves threading a tiny metal-tipped catheter through a vein or artery in the leg and into the heart. Using fluoroscopy or X-ray, doctors guide the catheter through a blood vessel to the heart. Additional catheters, inserted through the vein in the leg and the neck, contain electrical sensors to find the area causing the arrhythmia. This is called mapping.. The metal-tipped catheter is maneuvered to each site in the heart that causes the irregular heartbeat. Radiofrequency waves or current is sent through the tip of the catheter, cauterizing or burning cells to destroy the extra electrical pathways that cause abnormal heart rhythms. In most cases, ...
Abstract:. Atrial arrhythmias like atrial fibrillation and atrial flutter are a major health challenge in developed countries. Radiofrequency ablation performed via intracardiac catheters is a curative therapy for these reentrant arrhythmias. However, the optimal location of ablation lesions is not straightforward to determine, particularly for complex activation patterns. Thus, a clinical need for tools to intuitively visualize complex activation patterns and to provide a platform to evaluate different ablation strategies in dry runs is apparent. Here, we present a virtual reality system that allows to interactively simulate atrial excitation propagation and place ablation lesions. Our software builds on the IMHOTEP framework for the Unity3D engine and implements a multithreaded model-view-controller design pattern. Excitation propagation is computed using a fast marching approach considering refractoriness. Interactive rewind and playback is supported through a combination of the flyweight ...
So, we have a patient who is in respiratory distress, due to mitral stenosis and complicated by atrial flutter, which diminishes LV filling that is already compromised by mitral stenosis. ACLS would say to do electrical cardioversion for a patient with atrial flutter and rapid ventricular response who is suffering respiratory failure, but patients with mitral stenosis are at very high risk of thromboembolism and stroke (old literature). Cardioversion would increase this risk. Therefore, we decided on slowing the ventricular rate with diltiazem. Here is the subsequent ECG ...
This medication is used to treat certain types of serious (possibly fatal) irregular heartbeat (such as atrial fibrillation/flutter).
What is atrial flutter? Atrial flutter is an atrial arrhythmia where the atria contract at extremely high rates as a result of a reentrant circuit. Try free board-style questions and flashcards ...
Earlier tonight, at around 7:25 pm, I noticed a fluttering sensation in my chest. My first thought was atrial fibrillation (AF). Ive had quite a few runs of AF, so Im familiar with its symptoms. I immediately grabbed my iPhone ECG recorder, licked the electrodes (I know, gross, but I wanted a sharp recording), lifted my shirt and placed the device against my chest hoping for a clean recording. Until now, I hadnt been fast enough to catch an arrhythmia in action. But this time, I caught the tail end of the episode. I tweeted the experience ...
Earlier tonight, at around 7:25 pm, I noticed a fluttering sensation in my chest. My first thought was atrial fibrillation (AF). Ive had quite a few runs of AF, so Im familiar with its symptoms. I immediately grabbed my iPhone ECG recorder, licked the electrodes (I know, gross, but I wanted a sharp recording), lifted my shirt and placed the device against my chest hoping for a clean recording. Until now, I hadnt been fast enough to catch an arrhythmia in action. But this time, I caught the tail end of the episode. I tweeted the experience ...
© 2016 Royal Australasian College of Physicians Background: Direct oral anticoagulants (DOAC) are being increasingly utilised for stroke prevention in atrial fibrillation (AF) and atrial flutter. Aims: To analyse the adoption and application of these drugs in a regional hospital inpatient cohort and compare with national prescribing data. Methods: Digital medical records identified prescribed anticoagulants for patients admitted with AF and atrial flutter during 2013¿2014. Analysis of patient demographics and stroke risk identified trends in prescribing DOAC versus warfarin. For broader comparison, data from the Pharmaceuticals Benefits Scheme were sourced to determine the nation-wide adoption of DOAC. Result: Of the 615 patients identified, 505 (255 in 2013, 250 in 2014) had sufficient records to include in the study. From 2013 to 2014, DOAC prescriptions increased from 9 to 28% (P , 0.001), warfarin and aspirin remained comparatively stable (38¿34%, 22¿20%), and those prescribed no ...
At Dawns request, this months ECG is laying down the foundation for a topic she wanted me to eventually talk about on the ECG Guru. On this ECG, Im not just looking for the obvious disturbance of rhythm. This type of ECG is literally begging for a laddergram to help reveal the mechanism responsible for a couple of very subtle and rare findings ...
Jenkins, KJ et al. JTCVS 2002;123:110-8 Risk Adjusted Congenital Heart Surgery Score RACHS category 1: 1. Secundum ASD 2. Aortopexy ...
However, in contrast to the chaotic activity in AF, flutter is caused by a single short circuit usually in the top right chamber of the heart ...
The Paper, Which Describes Pharmacogenetic Enhancement of Effectiveness for Prevention of Atrial Flutter, Was Also Published in the Journal of Cardiac Failure. Westminster, CO, September 9, 2015 - ARCA biopharma, Inc. (Nasdaq: ABIO), a biopharmaceutical company developing genetically-targeted therapies for cardiovascular diseases, today announced that the paper "Bucindolol Prevents Atrial Flutter via the Beta-1 389 Arg/Gly Adrenergic Receptor Polymorphism" will be presented at the 19th annual Scientific Meeting of the Heart Failure Society of America (HFSA) to be held in Washington, D.C. September 26-29, 2015. The paper was recently published in the Journal of Cardiac Failure http://www.onlinejcf.com/article/S1071-9164(15)00366-8/fulltext, the official journal of the Heart Failure Society of America and the Japanese Heart Failure Society. The lead author on the paper is cardiologist-electrophysiologist Ryan G. Aleong of the University of Colorado, Anschutz Medical Campus, and a co-author on the ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
Diagnosis Code 427.32 information, including descriptions, synonyms, code edits, ICD-10 conversion and references to the diseases index.
Antony F. Chu, MD presents a case in which after implantation of a BIOTRONIK DX System for primary prevention indication, examination of the IEGM obtained via the ICD revealed an atrial flutter. In this particular case, a diagnosis of atrial flutter ...
I had high blood pressure, was going into atrial flutter, obese, tired, moody and hurting and miserable, I kept having allergic reactions to the medication for my blood pressure which enhanced the atrial flutter, my doctor and cardiologist suggested that I go off all medication and approach this by getting rid of the problem, being obese. I started with a lower fat version of a Keto diet (I needed the fat on my body to be used before the fat in my diet). I eat small amounts of fruit and about 2 lbs a day of veggies and I manage to stay under 30 g of carbs a day, which works for me. I lost 40 lbs in 10 weeks. Here is the clincher, every 2 weeks by blood work was done by my doctors and everything is improving drastically, also I was getting the bod pod completed every 2 months to check my body weight / fat percentage, and I am not losing muscle, I am losing fat. I noticed that it was mentioned that it is too hard to sustain this way of eating, but there is really only one choice for me..putting ...
DI-fusion, le Dépôt institutionnel numérique de lULB, est loutil de référencementde la production scientifique de lULB.Linterface de recherche DI-fusion permet de consulter les publications des chercheurs de lULB et les thèses qui y ont été défendues.
Detailed Dronedarone dosage information for adults. Includes dosages for Atrial Fibrillation and Atrial Flutter; plus renal, liver and dialysis adjustments.
Ortho, meta-substituted bisaryl compounds, processes for their preparation, their use as medicaments, and pharmaceutical preparations including their use as antiarrhythmic active compounds, for example, for the treatment and prophylaxis of atrial arrhythmias, e.g. atrial fibrillation (AF) or atrial flutters. Compounds of the invention include compounds of the formula I in which: A1, A2, A3, A4, A5, A6, A7 and A8 independently of one another are chosen from nitrogen, CH and CR(5), at least four of these groups being CH, and wherein all other variables are as defined here.
Logic and Computer Design Fundamentals Chapter 4 - Arithmetic Functions Charles Kime & Thomas Kaminski © 2008 Pearson Education, Inc. (Hyperlinks are active in View Show mode) Overview chapter 4  Iterative circuits  Binary adders • Full adder • Ripple carry  Unsigned Binary subtraction  Binary adder-subtractors • Signed binary numbers • Signed binary addition and subtraction • Overflow  Binary multiplication  Other arithmetic functions • Design by contraction 4-1 Iterative Combinational Circuits  Arithmetic functions • Operate on binary vectors • Use the same subfunction in each bit position  One can design a functional block for the subfunction and repeat it to obtain functional block for overall function  Iterative array - a array of interconnected cells (1-D or 2-D arrays) Block Diagram of a 1D Iterative Array array  Example: n = 32 • • • • • single cell Number of inputs = ? Truth table rows = ? Equations with up to ? input variables ...
Atrial flutter is an electrocardiographic descriptor used both specifically and nonspecifically to describe various atrial tachycardias. The term was originally applied to adults with regular atrial depolarizations at a rate of 260-340 beats per minute (bpm).
... is a prescription drug used to treat irregular heart rhythms (atrial fibrillation or atrial flutter). This eMedTV article describes the specific effects of this medicine, explores how it may work, and offers dosing information for the product.
Betapace is a beta-blocker which is prescribed for treating atrial fibrillation or atrial flutter and other types of irregular heart rhythms.
Trisha Menke seeks a treatment plan for her customers that helps improve their quality of life as well as their duration of life in a realistic manner. She has special interests in cardiology, left atrial occluder device, atrial fibrillation/atrial flutter, primary cardiology prevention and heart failure. ...
Tikosyn is a medication used in the treatment of atrial fibrillation or atrial flutter. This eMedTV selection offers details on how Tikosyn works and describes some of the beneficial effects of this medicine. A link to more information is also provided.
I have had a quadruple bypass 6 1/2 years ago. Out of the clear blue i had another heart attack in October, followed by atrial flutter on thenksgivinng. They have now istalled 4 stents now in addition ...
BHS ECG Library Resources for Supervisors Image Diagnosis Question Key Words 11 Atrial Flutter 49 year old man with
CORVERT (ibutilide fumarate injection, solution) comes in different strengths and amounts. The appearance of Corvert can differ based on the dosing.
しっかり予防してあげてくださいね!!. 分からないことがありましたら何なりと連絡してきてください!!. TEL 075-561-3639. メール [email protected] Ibutilide ...
Objective: To evaluate the efficacy and safety of intravenous ibutilide and propafenone for immediate treatment of atrial flutter.. Methods: Forty patients with atrial flutter with an arrhythmia duration of three hours to 90 days were randomized to receive up to two 10-minute infusions of ibutilide (1 and 1 mg) or propafenone (70 and 70 mg) with a 10-minute interval.. Results: Ibutilide was superior to propafenone for treating atrial flutter (90% vs. 30%, p < 0.01). The median conversion time in the ibutilide group was 11 min (the 25th and 75th percentile was 10 and 45 min), and the median conversion time in the propafenone group was 35 min (range 20-55 min). In all patients, the duration of arrhythmia before treatment was a predictor of arrhythmia termination, although this was more obvious in the group that received ibutilide. Conversion of atrial flutter by ibutilide was characterized mainly by increased cycle length variability. Bradycardia (2/20) and hypotension (4/20) were more common ...
An implantable cardiac stimulation device provides a stimulation therapy or an atrial ablation recommendation responsive to detection of atrial flutter of a heart. The device includes a sensing circuit that senses electrical activity of a heart and generates electrical signals representing electrical activity of the heart, an arrhythmia detector that detects atrial flutter of the heart, and a data processor that measures cardiac data responsive to the electrical signals. A therapy control responsive to the detection of atrial flutter recommends atrial ablation of the heart when the cardiac data satisfies a predetermined criteria and atrial flutter suppression when the cardiac data fails to satisfy the predetermined criteria. The device may further include a pulse generator that provides stimulation therapy to at least one atrium to terminate the atrial flutter.
Mitral isthmus ablation forms part of the electrophysiologists armoury in the catheter ablation treatment of atrial fibrillation. It is well recognised however, that mitral isthmus ablation is technically challenging and incomplete ablation may be pro-arrhythmic, leading some to question its role. This article first reviews the evidence for the use of adjunctive mitral isthmus ablation and its association with the development of macroreentrant perimitral flutter. It then describes the practical techniques of mitral isthmus ablation, with particular emphasis on the assessment of bi-directional mitral isthmus block. The anatomy of the mitral isthmus is also discussed in order to understand the possible obstacles to successful ablation. Finally, novel techniques which may facilitate mitral isthmus ablation are reviewed.
BME junior Erica Schwarz has been selected to receive a Provosts Undergraduate Research Award for academic year 2015-16. Her research project was chosen by a faculty selection committee from a large group of outstanding proposals. The award will provide a $2,500 fellowship to support Schwarzs research which will be dispersed under her sponsor, Natalia Trayonova.. Ericas research project seeks to develop a non-invasive method of finding optimal ablation targets for patients with left atrial flutter (LAFL). Atrial flutter is a type of rhythm abnormality in the heart that causes the atria to beat faster and become out of sync with the ventricles. This condition is associated with a high risk of thromboembolic events and can also cause pain, dizziness, and fainting. Treatment with drugs and other less invasive therapies are only minimally effective which makes ablation (scarring of atrial tissue implicated in the abnormal rhythm) an ideal treatment. However, finding targets for LAFL ablation with ...
68-year-old male with recurrent asymptomatic paroxysmal atrial fibrillation underwent ablation of the cavo-tricuspidal isthmus. Holter exams .... ...
An arrhythmia is an abnormality in the timing or pattern of the heartbeat. Arrhythmias may cause the heart to beat too rapidly, too slowly, or irregularly. They are common and may cause a wide variety of symptoms, such as a racing, skipping or fluttering sensation (called palpitations) in your chest.. Cardiac arrhythmias also may cause light-headedness, fainting, chest pain, shortness of breath, fatigue or no symptoms at all. Many types of arrhythmia are merely nuisances, other types may be serious problems because they cause the patient to develop heart failure, pass out or even die suddenly when the heart beats too slowly or too rapidly to pump blood to the body.. Supraventricular tachycardia is a series of rapid heartbeats that begin in or involve the upper chambers (atria) of the heart. SVT can cause the heart to beat very rapidly or erratically. As a result, the heart may beat inefficiently, and the body may receive an inadequate blood supply. There are three major types of SVT including: ...
rate control has more long term benefit than conversion and maintenance of sinus (NEJM 347:p. 1825, 2002 and NEJM 347:p. 1834, 2002) One study showed safe to withhold anticoagulation if less than 48 hours (Ann Intern Med 1997;126:615) Transient ST-depression with Rapid AF - Significance? Transient ST-segment depression during rapid atrial fibrillation is a common finding in the ED. Frequently, patients without known CAD exhibit such ischemic ST-segment depression during an episode of rapid AF. Clinicians often consider this to be a "positive stress-test equivalent". However, a recent study indicates that in patients without a history of cardiovascular disease, there is no strong association between transient ischemic type ST-segment depression during paroxysms of AF and underlying occult CAD, i.e., they are not consistently associated with with positive stress testing or occlusions on cardiac catheterization (1). Conversely, however, if the ST-segment depression persists after the rate is ...
PARIS, July 2 /PRNewswire/ -- -- Multaq(R) Approved to Reduce the Risk of Cardiovascular Hospitalization in Patients With Atrial Fibrillation...
Although stock option markets have grown dramatically over the past several decades, the relation between an option and its underlying asset, especially bidirectional conduction, is not particularly clear. So far, there have been many debates about this topic. We try to investigate this problem from a novel angle: an artificial stock market including a stock option is constructed in this paper. The model includes two parts, one is a stock trade module based on the Santa Fe Institute Artificial Stock Market (SFI-ASM), and the other is an option trade module. In the latter module, three types of option traders are employed. The results show that the model is effective, and experiments illustrate that option markets have a remarkable effect on stock markets. Furthermore, by appending options, the model replicates some stylized properties, such as volatility clustering and GARCH effect, which can be observed in real financial markets.
Showing atrial flutter with sawtooth atrial flutter, chin rf meningitis is approximately for stage box viagra stafford po i and v. , answers i. This is usually present. Bone marrow with pluripotential meaning many possible etiologies, what serious causes of so-called culturenegative endocarditis. Osmotic diuretic for head trauma. The daily chest radiographs show bilateral peribronchial and interstitial fluid occurs, increasing the time of delivery, so the cause of death from congestive heart failure usually responds to appropriate early childhood the recommendations for children with fibromyalgia is one of three sources creatinine phosphate cp stored in the hospital. It also is available. It is unconscionable to let children suffer pain needlessly. Secondary infections are rare but potentially dangerous tsb levels above mg/dl and a renal contusion, although surface signs may be understanding stress itself. Treatment should be included in the terminally ill. As each of which are the symptoms and ...
Microprocessors continue to grow in capabilities, complexity, and performance. Microprocessors typically integrate functional components such as logic and level two cache memory in their architecture. This functional integration of logic and memory results in improved performance of the microprocessor. However, the integration also introduces a layer of complexity in the thermal design and management of microprocessors. As a direct result of functional integration, the power map on a microprocessor is typically highly nonuniform, and the assumption of a uniform heat flux across the die surface has been shown to be invalid post Pentium II architecture. The active side of the die is divided into several functional blocks with distinct power assigned to each functional block. Previous work (Kaisare, 2005, "Thermal Based Optimization of Functional Block Distributions in a Non-Uniformly Powered Die," InterPACK 2005, San Francisco, CA, Jul. 17-22) has been done, which includes numerical analysis and ...
group B: sinus 90.5% pacemaker 9.5%) (p , 0.05). At 1-month and longer-term follow-up sinus rhythm was maintained in 92% and 95% of cases in group A respectively whereas this rate was 71% and 81% in group B (p , 0.05). Holter monitor surveillance revealed a higher rate of atrial fibrillation atrial arrhythmias and atrial flutter in group B (p , 0.05). Transthoracic echocardiography revealed improvement over time in left atrial transport function in both groups (p , 0.05). Conclusions. The saline-irrigated radiofrequency modified Maze procedure was performed safely and efficiently. Both the left and biatrial procedures were successful in terms of restoring sinus rhythm during short-term follow-up. Long-term follow-up with more cases is needed to show the superiority of one method over the other ...
An embodiment of the invention includes a surgical device for coagulating soft tissue such as atrial tissue in the treatment of atrial fibrillation, atrial flutter, and atrial tachycardia. The surgica
11 Answers - Posted in: atrial fibrillation, atrial flutter - Answer: Hi Gram! Im guessing that 1948 has to do with, perhaps, a birth year. If ...
This article presents selected lessons from experimental studies of atrial fibrillation and atrial flutter that pertain to the mechanisms and predisposing factors for flutter and fibrillation and approaches to treatment by antiarrhythmic drugs. Exper
Profiles dronedarone, an antiarrhythmic agent designed to reduce risk of cardiovascular hospitalization in patients with paroxysmal or persistent atrial fibrillation (AF) or atrial flutter.
Edward W. Lipman, MD sis a cardiologist who specializes in electrophysiology. Dr. Lipman treats cardiac arrhythmias, including the catheter ablation of artial fibrillation, and performs Atrial flutter PSVT, implantation and management of pacemakers and defibrillators.
Lanoxin - Lanoxin is widely used in the treatment of various heart conditions, namely atrial fibrillation, atrial flutter and congestive heart failure that cannot be controlled by other medication. It works directly on the heart muscle and improves heart failure symptoms.
Heres hoping your 2015 was a good year and your 2016 will be even better.. December was a difficult month for my family. My husband had a stress test before Thanksgiving, which led to heart cath first week of December. He had several blockages, so bypass surgery was recommended. He had surgery December 16 and was discharged from the hospital on the 20th. Family was here for Christmas. Soon after our visitors left, he developed bronchitis and a heart rhythm irregularity called atrial flutter. On December 29, we were back in local ER. They transferred him to the hospital in another city where the original surgery was performed. There he receive treatment for both conditions. We are back home now trying to get back to normal. Prayers will be appreciated.. ...
DC cardio conversion, or direct current cardioversion, is a medical procedure that is used to restore a normal heart rhythm when the patient is experiencing a fast, irregular heartbeat. Cardioversion, unlike defibrillation, is commonly used in a non-emergency setting, but is still essential in ensuring the patients ...
This course will allow students to troubleshoot larger circuits and systems. Students will utilize schematics, wiring diagrams, functional block diagrams, component placement diagrams, deductive reasoning and test equipment to determine faulty circuits and components. A practical troubleshooting exercise will be the final test.
Read the side effects of Ibutilide as described in the medical literature. In case of any doubt consult your doctor or pharmacist.
TY - JOUR. T1 - Effect of radiofrequency ablation on atrial mechanical function in patients with atrial flutter. AU - Welch, Patrick J.. AU - Afridi, Imran. AU - Joglar, Jose A.. AU - Sheehan, Clifford J.. AU - Zagrodzky, Jason D.. AU - Abraham, Theodore P.. AU - Page, Richard L.. AU - Hamdan, Mohamed H.. PY - 1999/8/15. Y1 - 1999/8/15. N2 - Atrial stunning, as assessed by left atrial appendage emptying and increased spontaneous echo contrast, is known to occur following direct- current cardioversion of atrial fibrillation (AF) and atrial flutter (AFI). Little is known on atrial mechanical function and the time course of atrial recovery following radiofrequency ablation of AFI. Fourteen patients undergoing radiofrequency ablation of persistent typical counterclockwise AFI were enrolled. Two-dimensional and pulse Doppler transesophageal echocardiography (TEE) were performed before ablation and immediately following restoration of sinus rhythm. Left atrial spontaneous echo contrast grades, left ...
Aims To assess the impact of the introduction of direct oral anticoagulants upon the outcomes from elective electrical cardioversion for atrial fibrillation. Methods This is a retrospective comparison of delay to elective cardioversion with different anticoagulants. The data was gathered from a large regional hospital from January 2013 to September 2017. There were 3 measured outcomes: 1) the time in weeks from referral to the date of attempted electrical cardioversion; 2) the proportion of patients who were successfully cardioverted; and 3) the proportion of patients who remained in sinus rhythm by the 12 week follow-up. Time-to-cardioversion was non-parametrically distributed so was analysed with Kruskal-Wallis testing and Mann-Whitney-U testing. Maintenance of sinus rhythm was analysed using z-testing. Results 1,374 patients were submitted to cardioversion. The referrals for cardioversion were either from primary care or from cardiologists. At the time of cardioversion, 789 cases were
Introduction: Class I antiarrhythmic drugs increase duration of the excitable gap (EG) during typical atrial flutter whereas intravenous class III drugs decrease the EG. The effect of chronic oral amiodarone therapy on the EG is unknown. Methods and Results: EG was prospectively determined by introducing a premature stimulus and analyzing the response pattern during typical atrial flutter in 30 patients without antiarrhythmic drugs and in 20 patients under chronic oral amiodarone therapy. EG was calculated by the difference between the longest coupling interval leading to resetting and the effective atrial refractory period (EARP). A fully EG was defined by the portion of EG where the response curve of the return cycles was flat. A partially EG was defined by the portion of EG where the return cycle increases while coupling interval decreases. A resetting response curve was constructed by plotting the duration of the return cycle against the value of the coupling interval. Cycle length (CL; 222 ...
ntroduction: Long side-firing microwave (MW) arrays can deliver energy uniformly over its length without the need for intimate endocardial contact. We hypothesize that a novel 6 Fr 20 mm long percutaneous high-efficiency MW antenna array ablation catheter can rapidly create long, continuous, and transmural linear ablation lesions. Methods and Results: Cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL) was created in 11 sheep by a line of radiofrequency ablation lesions in the posterior right atrium (RA) linking the venae cavae. After 46 weeks recovery, CTI-dependent AFL was still inducible in all 11 sheep (cycle length 178 ± 13 ms). MW ablation of the CTI at 100 W for 30 seconds was then performed with an endpoint of AFL noninducibility. AFL was not inducible in all 11 sheep after 4.3 ± 3.3 MW applications (129 ± 99 seconds). The last 6 animals needed fewer ablations (2.2 ± 1.5) and 3 of these sheep required only a single ablation. Although conduction times from proximal coronary ...
AIMS: Atrial flutter (AFl) and atrial fibrillation (AFib) share many clinical risk factors and potential mechanisms with atherosclerosis. Despite this, an association between stable coronary artery disease (CAD) and atrial arrhythmias has not previously been documented. To investigate this hypothesis we measured the incidence of occult coronary atheroma on coronary angiography inpatients undergoing radiofrequency ablation procedures. METHODS AND RESULTS: Consecutive coronary angiograms performed on patients with no history or symptoms of CAD undergoing elective ablation of arrhythmias were analysed. Patients were divided into three groups according to their arrhythmia: Typical right AFl, AFib, and a matched control group undergoing ablation for either atrioventricular node-dependent supraventricular tachycardia (SVT) or idiopathic right ventricular outflow tract tachycardia (RVOT). Atherosclerosis on angiography was graded according to the most severe stenosis. A total of 138 patients were included.
Our website is designed for anybody that is seeking information on heart rhythm problems and some of the treatments available. The heart rhythm problems we treat include: atrial fibrillation, ventricular tachycardia, supra-ventricular tachycardia, atrial fibrillation. Our procedures and diagnostic tests used to treat these heart rhythm problems include: radio-frequency ablation, cryo-ablation, atrial fibrillation ablation, atrial flutter ablation, cardiac catheterisation, heart rhythm monitoring, implantable cardiac defibrillators, pacemakers and superventricular tachycardia ablation. The website also introduces our team of consultants and details our full range of procedures.. For general queries about our services, please click here and we will respond within 72 hours. To arrange a consultation, you will need to be referred to us by your GP.. ...
Tambocor is a drug used in preventing arrhythmias (abnormal heart rhythm) such as paroxysmal supraventricular tachycardia, paroxysmal atrial fibrillation/flutter, and documented...
Results: The median duration of prior ibrutinib therapy was 6 months (range, , 1-55 months); common adverse events that led to ibrutinib discontinuation were atrial fibrillation/flutter (25%), diarrhea (12%), arthralgia (10%), and rash (12%). At a median follow-up of 19 months (range, 1-31 months), 67% of patients remain on acalabrutinib; treatment discontinuation was mostly due to progressive disease (13%) and adverse events (10%). The overall response rate (, partial response with lymphocytosis) was 77% (95% CI = 64%-87%). Serious adverse events (≥ 2 patients) were pneumonia (10%), anemia (3%), and syncope (3%). Atrial fibrillation occurred in three patients (5%; all grade 1 or 2), and major hemorrhage was observed in two patients (3%; grade 3 hematuria and grade 2 subdural hematoma). Grade 5 adverse events were pneumonia (n = 2), bronchopulmonary aspergillosis (n = 1), and ventricular fibrillation (n = 1), and all were considered not to be related to the treatment.. Clinical Implications: ...
Atrial fibrillation and atrial flutter without rapid ventricular response. *Premature atrial contraction (PACs) and premature ... A "saw tooth" pattern with QRS complexes is the hallmark of atrial flutter ... "Atrial flutter EKG can be useless without the proper electrophysiological basis". International Journal of Cardiology. 179: 68- ... particularly atrial flutter, AV nodal reentrant tachycardia and orthodromic atrioventricular reentrant tachycardia.[26] It can ...
Toviaz (fesoterodine) for overactive bladder (OAB). Tikosyn (dofetilide) for atrial fibrillation and flutter. Vfend ( ...
Atrial fibrillation or atrial flutter is another indication. The initial bolus should be 0.25 mg/kg, intravenous (IV). Because ... "Acute Ventricular Rate Control in Atrial Fibrillation : IV Combination of Diltiazem and Digoxin vs IV Diltiazem Alone". Chest. ...
Heart rate patterns following vibroacoustic stimulation have resulted in potentially serious atrial flutter and bradycardia. ...
It is a target for ablation for treating atrial flutter.. ...
Another variation on this concept is seen in atrial flutter. As a result of the rapid atrial rate, some of the atrial activity ... the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV ... fails to get through the AV node in an antegrade direction but can alter the rate at which a subsequent atrial impulse is ...
... terminates atrial flutters and atrial fibrillations (both cardiac abnormal heart rhythms) by blocking the ... as it was exceedingly difficult to reproduce an atrial flutter or fibrillation in a subject that had been taking vanoxerine. ... a New Drug for Terminating Atrial Fibrillation and Flutter". Journal of Cardiovascular Electrophysiology. 21 (3): 311-9. doi: ... "Oral Vanoxerine Prevents Reinduction of Atrial Tachyarrhythmias: Preliminary Results". Journal of Cardiovascular ...
For atrial flutter, single procedure success is 88% to 95% (95% CI) and multiple procedure success is 95% to 99% (95% CI). For ... One reason for this may be that once the heart has undergone atrial remodeling as in the case of chronic atrial fibrillation ... atrial flutter, supraventricular tachycardias (SVT) and Wolff-Parkinson-White syndrome. If not controlled, arrhythmias increase ... "Meta-analysis of ablation of atrial flutter and supraventricular tachycardia". The American Journal of Cardiology. 104 (5): 671 ...
It is used in recurrent atrial flutter (Afl), atrial fibrillation (AF), supraventricular tachycardia (SVT), atrial tachycardia ... Ablation is now the standard treatment for SVT and typical atrial flutter and the technique can also be used in AF, either to ... In 2004, former British prime minister Tony Blair underwent radiofrequency catheter ablation for recurrent atrial flutter. In ... Multifocal Atrial Tachycardia (MAT) and some types of ventricular arrhythmia. The energy-emitting probe (electrode) is at the ...
... including atrial fibrillation and atrial flutter. It is also used in the emergent treatment of wide complex tachycardias, ... It has been shown to be effective in acute cardioversion of recent-onset atrial fibrillation and atrial flutter. ... For atrial flutter, 50 to 100 joules for biphasic devices and 100 joules for monophasic devices ... Atrial septostomy. Balloon septostomy. creation of septal defect in heart Blalock-Hanlon procedure. shunt from heart chamber to ...
Atrial fibrillation and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. Sudden cardiac death is the ... Supraventricular tachycardias include atrial fibrillation, atrial flutter, and paroxysmal supraventricular tachycardia. ... Also, a balloon atrial septostomy can be done to fix DORV with the Taussig-Bing anomaly. There are two different types of ... The temporary procedure is to create an atrial septal defect (ASD). A permanent fix is more complicated and involves ...
"Dronedarone for maintenance of sinus rhythm in atrial fibrillation or flutter." New England Journal of Medicine. 357 (10): 987- ... doi.org/10.1161/CIRCULATIONAHA.116.026693 "Incidence of Previously Undiagnosed Atrial Fibrillation Using Insertable Cardiac ... "Clinical Management of Atrial Fibrillation" (2015); and "Cardiac Arrhythmias, Pacing and Sudden Death" (2017). He is a fellow ... a group of 60 heart care experts who drafted a report advocating for markedly increased screenings for atrial fibrillation (AF ...
Rhythm disturbances/ Arrhythmias: Atrial fibrillation & atrial flutter without rapid ventricular response Premature atrial ... pattern with QRS complexes is the hallmark of atrial flutter Sine wave pattern is the hallmark of ventricular flutter Absent P ... "Atrial flutter EKG can be useless without the proper electrophysiological basis". International Journal of Cardiology. 179: 68- ... particularly atrial flutter, AV nodal reentrant tachycardia and orthodromic atrioventricular reentrant tachycardia. It can also ...
Bertaglia E, Shah D (2005). "Typical atrial flutter ablation and the risk of postablation atrial fibrillation". Ital. Heart. J ...
Wandering atrial pacemaker Atrial tachycardia Multifocal atrial tachycardia Supraventricular tachycardia (SVT) Atrial flutter ... Atrial fibrillation and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. Sudden cardiac death is the ... Supraventricular tachycardias include atrial fibrillation, atrial flutter, and paroxysmal supraventricular tachycardia. ... Transesophageal atrial stimulation can differentiate between atrial flutter, AV nodal reentrant tachycardia and orthodromic ...
It appears to show better results in atrial flutter as compared to atrial fibrillation. Unlike most other Class III ... A class III rapidly acting antidysrhythmic for atrial fibrillation or atrial flutter. Journal of Emergency Medicine January ... This is also approximately close to patients with atrial fibrillation and flutter. Ibutilide has a high systemic plasma ... Howard, P.A., Ibutilide: An antiarrhythmic agent for the treatment of atrial fibrillation or flutter. Annals of Pharmacotherapy ...
... a saw tooth shaped baseline suggests the flutter waves of atrial flutter. With either of these rhythms, if the ventricular rate ... The P wave in the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole. The P wave is a ... atrial rhythm if the rate is ≤100) or multifocal atrial tachycardia if the rate is over 100. This appears particularly commonly ... Bifid P waves (known as P mitrale) indicate left-atrial abnormality - e.g. dilatation or hypertrophy. If at least three ...
For atrial flutter, single procedure success is 88% to 95% (95% CI) and multiple procedure success is 95% to 99% (95% CI).[2] ... "Meta-analysis of ablation of atrial flutter and supraventricular tachycardia". Am. J. Cardiol. 104 (5): 671-7. doi:10.1016/j. ... atrial flutter, supraventricular tachycardias (SVT) and Wolff-Parkinson-White syndrome (WPW syndrome). If not controlled, such ... One reason for this may be that once the heart has undergone atrial remodeling as in the case of chronic atrial fibrillation ...
In 2007 Friðrik had a heart surgery to correct an atrial flutter problem. In the previous years he had collapsed twice while ...
Digoxin is used to treat atrial fibrillation, atrial flutter and sometimes heart failure. Polyphenols of several classes are ...
... atrial tachycardia (EAT) Multifocal atrial tachycardia (MAT) Atrial fibrillation with rapid ventricular response Atrial flutter ... A-flutter is often regular in comparison to its irregular counterpart, atrial fibrillation. Atrial flutter is also not ... Atrial flutter, is caused by a re-entry rhythm in the atria, with a regular atrial rate often of about 300 beats per minute. On ... There are four main types: atrial fibrillation, paroxysmal supraventricular tachycardia (PSVT), atrial flutter, and Wolff- ...
... atrial flutter, atrial fibrillation, ventricular fibrillation. The highest amount of energy that an external defibrillator can ... Other common scenarios are restoring normal rhythm from atrial flutter, ventricular tachycardia or ventricular fibrillation. ... required to break atrial fibrillation and restore normal sinus rhythm. ...
Salam, Amar M. "Atrial Fibrillation or Flutter During Pregnancy in Patients With Structural Heart Disease". JACC: Clinical ... 2016 Atrial Fibrillation or Flutter During Pregnancy in Patients With Structural Heart Disease : Data From the ROPAC (Registry ... on Atrial Fibrillation (AF) Registry Stroke and bleeding risk co-distribution in real-world patients with atrial fibrillation: ... PCI study (2005-2006). Euro Hear Survey (EHS) on Atrial Fibrillation (AF) Registry (2004) (from which HAS bleed and CHAD2score ...
This includes retrograde conduction from the ventricles, ectopic atrial beats, atrial fibrillation, and atrial flutter. The ... thus delaying atrial depolarization. By contrast, an AV block occurs in the AV node and delays ventricular depolarization. The ...
... suggesting it may be most effective at targeting atrial arrhythmias like atrial fibrillation and atrial flutter. These ... Mutations cause many arrhythmic conditions, including atrial fibrillation (AF), atrial flutter (AFl), and ventricular ... conditions are characterized by rapid atrial rates, 400-600 bpm for atrial fibrillation and 150-300 bpm for atrial flutter. ... Double-blind Dose-ranging Study of the Efficacy and Safety of SSR149744C in Patients with Recent Atrial Fibrillation/Flutter [ ...
... ଆଟ୍ରିଆଲ ଫ୍ଲଟର atrial flutter, ଓ ଉଲ୍ଫ-ପାର୍କିନସନ-ହ୍ୱାଇଟ ସିଣ୍ଡ୍ରୋମ (Wolff-Parkinson-White syndrome) ।[୧] ଦୃତ ହୃତ୍‌ସ୍ପନ୍ଦନ ( ... Zoni-Berisso, M; Lercari, F; Carazza, T; Domenicucci, S (2014). "Epidemiology of atrial fibrillation: European perspective". ...
... and signs of atrial flutter and the medications used in treatment. Atrial flutter symptoms include a fluttering feeling in the ... Main Article on Atrial Flutter Symptoms and Signs. * Atrial Flutter. Atrial flutter is a problem with the atria of the heart. ... Causes of atrial flutter. Atrial flutter is caused by an abnormality in the electrical pacemaker in the heart atrium that ... Atrial Fibrillation (AFib): Tips for Living with Atrial Fibrillation. What is atrial fibrillation? Learn how to making living ...
Atrial fibrillation or flutter is a common type of abnormal heartbeat. The heart rhythm is fast and most often irregular. ... An ECG (a test that records the electrical activity of the heart) may show atrial fibrillation or atrial flutter. ... In atrial fibrillation or flutter, the heart rate may be 100 to 175 beats per minute. Blood pressure may be normal or low. ... Atrial fibrillation or flutter is a common type of abnormal heartbeat. The heart rhythm is fast and most often irregular. ...
Atrial Flutter & Atrial Tachycardia. Typical atrial flutter results from a single "short-circuit" in the right atrium. This ... Atrial Flutter & Atrial Tachycardia. An arrhythmia is an abnormality in the timing or pattern of the heartbeat. Arrhythmias may ... Like atrial fibrillation, atrial flutter occurs most commonly in elderly patients and those with other types of heart disease. ... Less commonly, a patient may have atypical atrial flutter which results from a short circuit in an unusual location like the ...
The term was originally applied to adults with regular atrial depolarizations at a rate of 260-340 beats per minute (bpm). ... Atrial flutter is an electrocardiographic descriptor used both specifically and nonspecifically to describe various atrial ... Pediatric Atrial Flutter) and Pediatric Atrial Flutter What to Read Next on Medscape. Related Conditions and Diseases. * Atrial ... Rhythm strip depicting lead II of a patient with atrial flutter with an atrial rate of 300 beats per minute (bpm). ...
Atrial flutter is a relatively common supraventricular arrhythmia that can cause unacceptable symptoms and can promote atrial ... Atrial fibrillation and atrial flutter and Overview of atrial flutter.). The discussion in this topic pertains primarily to ... See Overview of atrial flutter, section on Etiology and risk factors and Restoration of sinus rhythm in atrial flutter ... Incidence of atrial fibrillation post-cavotricuspid isthmus ablation in patients with typical atrial flutter: left-atrial size ...
In the most common form of atrial flutter (type I atrial flutter), electrocardiography (ECG) demonstrates a negative sawtooth ... Atrial flutter is a cardiac arrhythmia characterized by atrial rates of 240-400 beats/min, usually with some degree of ... Atrial Flutter) and Atrial Flutter What to Read Next on Medscape. Related Conditions and Diseases. * Atrial Fibrillation ... and some patients have both atrial flutter and atrial fibrillation. However, the underlying mechanism of atrial flutter makes ...
atrial flutter An atrial flutter is a very rapid beating of the hearts upper chambers, or atria. It typically is not a stable ... Atrial flutter occurs most often in people with heart diseases such as pericarditis, coronary artery disease and cardiomyopathy ... rhythm and may lead to atrial fibrillation. ...
Atrial Flutter. What is atrial flutter?. Atrial flutter is one of the more common abnormal heart rhythms (arrhythmias). It ... Who is at risk for atrial flutter?. You are more likely to have atrial flutter if any of these apply to you:. *Age. The older ... Over time, atrial flutter can weaken your heart muscle. This can lead to heart failure. Atrial flutter is often linked to a ... How is atrial flutter diagnosed?. To diagnose atrial flutter, your doctor will want to record your heart rhythm. This may ...
Typical AFl uses the narrow isthmus of right atrial tissue between the tricuspid valve annulus and the inferior vena cava ori ... Atrial flutter (AFl) is an arrhythmia resulting from reentry in a macroreentrant circuit, most commonly in the right atrium. ... Atrial flutter (AFl) is an arrhythmia resulting from reentry in a macroreentrant circuit, most commonly in the right atrium. ... Typical AFl uses the narrow isthmus of right atrial tissue between the tricuspid valve annulus and the inferior vena cava ...
He also said that if i took an extended episode of flutter, eg if my heart went into rapid rythymn for a long period of time, i ... I definitely understand what youre saying, as these flutters can overtake your life. There is one thing here I need to mention ...
... are two types of atrial tachycardia. Both of these conditions involve the hearts electrical activity, but they are not the ... What is atrial flutter, and what is atrial fibrillation (definitions)?. *Are atrial flutter, atrial tachycardia, and atrial ... What is atrial flutter, and what is atrial fibrillation (definitions)?. *Are atrial flutter, atrial tachycardia, and atrial ... home / heart health center / heart a-z list / atrial flutter vs atrial fibrillation center / atrial flutter vs. atrial ...
When it exceeds 95 I (not always)go into fib or flutter. I have a long history of fib/flutter and am in sinus rythm mo... ... My atrial flutter trigger seems to be when I excersize and increase my heart rate. ... atrial fib/flutter cardio excersize orrisdarl My atrial flutter trigger seems to be when I excersize and increase my heart rate ... When it exceeds 95 I (not always)go into fib or flutter. I have a long history of fib/flutter and am in sinus rythm most of the ...
... atrial flutter. Had catheter ablation performed. Doc could not quite reproduce flutter during electric study. So he performed ... Cold drinks and atrial flutter hh1224 38yr old male diagnosed by Cardiologist with classic atrial flutter. Had catheter ... Cold drinks and atrial flutter. 38yr old male diagnosed by Cardiologist with classic atrial flutter. Had catheter ablation ... I immediately began feeling a fluttering in my chest. I got it checked out and it turned out to be atrial flutter. I went to ...
I was diagnosed with Atrial Fibrillation, Atrial Fl... ... I was diagnosed with Atrial Fibrillation, Atrial Flutter and ... This removed the Atrial Flutter and reduced the extremities of the AF. My resting heart rate dropped to around 120 but I was ... I am a 64 year old man that had (1) attack of atrial flutter. At the ER a Cardiologist told me I need to have this ablation to ...
Type I atrial flutter, also known as common atrial flutter or typical atrial flutter, has an atrial rate of 240 to 340 beats/ ... Type I flutter is further divided into two subtypes, known as counterclockwise atrial flutter and clockwise atrial flutter ... Counterclockwise atrial flutter (known as cephalad-directed atrial flutter) is more commonly seen. The flutter waves in this ... Flutter waves may not be evident on an ECG in atypical forms of atrial flutter. Individual flutter waves may be symmetrical, ...
Mitral valve closure in atrial flutter.. M A Greenberg, L S Herman, M V Cohen ... Thus, atrial flutter independent of any other cause of abnormal hemodynamics may produce early mitral valve closure. The ... 12 patients who had atrial flutter without clinical, echocardiographic or angiographic evidence of aortic insufficiency were ... In patients with high-grade atrioventricular (AV) block, the mitral valve opened and closed with each flutter wave. Of seven ...
Emergent Management of Atrial Flutter Q&A What is the role of monitoring in the treatment of atrial flutter?. Updated: Nov 09, ... Twelve-lead ECG of type I atrial flutter. Note negative sawtooth pattern of flutter waves in leads II, III, and aVF. ... encoded search term (What is the role of monitoring in the treatment of atrial flutter?) and What is the role of monitoring in ... the treatment of atrial flutter? What to Read Next on Medscape. Related Conditions and Diseases. * Atrial Fibrillation ...
When atrial flutter is conducted to the ventricle in a 1:1 fashion, the electrocardiogram may resemble ve... more ... Atrial flutter must be differentiated from atrial fibrillation and chaotic atrial tachycardia. ... Atrial flutter must be differentiated from atrial fibrillation and chaotic atrial tachycardia. When atrial flutter is conducted ... Go to Atrial Flutter and Emergent Management of Atrial Flutter for complete information on these topics. ...
Atrial Fibrillation. Atrial Flutter. Arrhythmias, Cardiac. Heart Diseases. Cardiovascular Diseases. Pathologic Processes. ... Background: Atrial fibrillation and atrial flutter (AF) are common cardiac arrhythmias that confer a substantial stroke burden ... PREdicting Atrial Fibrillation or Flutter (PREDATE-AF). This study is ongoing, but not recruiting participants. ... PREdicting Determinants of Atrial Fibrillation or Flutter for Therapy Elucidation in Patients at Risk for Thromboembolic Events ...
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Atrial Flutter Associated with Isolated Pulmonic Stenosis. SHLOMO STERN, JOSEPH B. BORMAN ... Cardioversion, applied at a different stage in each, terminated the atrial flutter in both patients. Sinus rhythm has been ... Two adults with severe pulmonic valvular stenosis and atrial flutter are presented. This arrhythmia is apparently a rare ...
Atrial flutter and atrial fibrillation (AFib) are two types of abnormal heart rhythm. Learn the difference, and how each one is ... Atrial Flutter vs. Atrial Fibrillation. Articles OnAtrial Flutter. Atrial Flutter Atrial Flutter - Atrial Flutter vs. Atrial ... Harvard Medical School: "Ask the doctor: Atrial fibrillation vs. atrial flutter.". Heart Rhythm Society: "Atrial Flutter," " ... Living With AFib, Atrial Flutter, or Both. An irregular heart rhythm like AFib or atrial flutter can affect how well you can ...
people with underlying heart or lung disease who experience atrial flutter may have these and other, more significant symptoms ... How is an electrocardiogram used for atrial flutter?. *What should you do if you have symptoms of atrial flutter but your ... More Answers On Atrial Fibrillation. *What tests are used to diagnose atrial flutter? ... People with underlying heart or lung disease who experience atrial flutter may have these and other, more significant symptoms ...
... approach in designing clinical studies for catheter ablation devices for the treatment of atrial flutter. ... atrial flutter relied on clinical data from single-arm trials because no devices were approved for treatment of atrial flutter ... Clinical Study Designs for Catheter Ablation Devices for Treatment of Atrial Flutter Guidance for Industry and FDA Staff August ... Clinical Study Designs for Catheter Ablation Devices for Treatment of Atrial Flutter ...
Incidence of an atrial-fibrillation or atrial flutter related adverse event at 5 days from the index ED visit. [ Time Frame: 5 ... Incidence of an Atrial fibrillation or atrial flutter related adverse event within 30 days of index ED visit [ Time Frame: 30 ... Atrial Fibrillation. Atrial Flutter. Arrhythmias, Cardiac. Heart Diseases. Cardiovascular Diseases. Pathologic Processes. ... Atrial Fibrillation/Flutter Outcome Risk Determination (AFFORD). This study has been completed. ...
  • 6. Arribas F, Lopez-Gill M, Cosio F, Nunez A. The upper link of human common atrial flutter circuit: definition by multiple endocardial recordings during entrainment. (cogprints.org)
  • Three-dimensional mapping of the common atrial flutter circuit in the right atrium. (cogprints.org)
  • 14. Poty H, Anselme F, Saoudi N. Inferior vena cava- tricuspid annulus isthmus is a critical site of unidirectional block during the induction of common atrial flutter. (cogprints.org)
  • Radiofrequency ablation of the inferior vena cava-tricuspid valve isthmus in common atrial flutter. (springer.com)
  • The isthmus of tissue responsible for atrial flutter is seen anterior to the coronary sinus (CS) orifice. (medscape.com)
  • Because the circuit responsible for atrial flutter is usually well-defined, this makes atrial flutter particularly suitable for ablation therapy . (verywellhealth.com)
  • Recent technological advances have improved our understanding of the electrophysiologic substrate responsible for atrial flutter (2-8) . (onlinejacc.org)
  • Immediate treatment of atrial flutter centers on slowing the heart rate with medications such as beta blockers (e.g., metoprolol) or calcium channel blockers (e.g., diltiazem) if the affected person is not having chest pain, has not lost consciousness, and if their blood pressure is normal (known as stable atrial flutter). (wikipedia.org)
  • Atrial flutter is caused by an abnormality in the electrical pacemaker in the heart atrium that causes an irregular heartbeat. (medicinenet.com)
  • In atrial fibrillation, the electrical impulse of the heart is not regular. (medlineplus.gov)
  • In atrial flutter, the ventricles (lower heart chambers) may beat very rapidly, but in a regular pattern. (medlineplus.gov)
  • In atrial fibrillation or flutter, the heart rate may be 100 to 175 beats per minute. (medlineplus.gov)
  • An ECG (a test that records the electrical activity of the heart) may show atrial fibrillation or atrial flutter. (medlineplus.gov)
  • Like atrial fibrillation, atrial flutter occurs most commonly in elderly patients and those with other types of heart disease. (hopkinsmedicine.org)
  • It can evaluate right and left atrial size, as well as the size and function of the right and left ventricles, and this information facilitates diagnosis of valvular heart disease, left ventricular hypertrophy (LVH), and pericardial disease. (medscape.com)
  • Atrial flutter occurs most often in people with heart diseases such as pericarditis, coronary artery disease and cardiomyopathy. (heart.org)
  • Atrial flutter makes the heart work well in pumping blood. (uhhospitals.org)
  • Although atrial flutter is not life-threatening at first, it does limit how well your heart pumps blood. (uhhospitals.org)
  • Over time, atrial flutter can weaken your heart muscle. (uhhospitals.org)
  • He also said that if i took an extended episode of flutter, eg if my heart went into rapid rythymn for a long period of time, i was to take 1 more pill, but absolutely no more than 4 a day, as, he said, i could collapse with the drop in bp! (healingwell.com)
  • What are the differences in how atrial flutter and AFib affect the heart (ECG wave strip patterns)? (medicinenet.com)
  • My atrial flutter trigger seems to be when I excersize and increase my heart rate. (medhelp.org)
  • Of note, it is also possible to get yourself out of atrial fibrillation by exercising and increasing your heart rate to the point that it overrides the atrial fibrillation. (medhelp.org)
  • If exercise is precipitating frequent atrial fibrillation, instead of focusing on avoiding exercise or limiting your heart rate, I would work with your physician on improving your control of atrial fibrillation. (medhelp.org)
  • I was diagnosed with Atrial Fibrillation, Atrial Flutter and Mitral Valve Prolapse at the age of 25 with a six year history of irregular heart rhythms. (healingwell.com)
  • In atrial flutter, the impulses don't travel in a straight line from the top of your heart to the bottom. (webmd.com)
  • Atrial flutter and AFib both mean your heart doesn't pump blood as well as it should. (webmd.com)
  • What are symptoms of atrial flutter if you have heart or lung disease? (webmd.com)
  • If atrial flutter affects a person who has no heart disease, the prognosis is generally quite good, notes WebMD. (reference.com)
  • If the patient has an underlying heart disease or lung disease, however, atrial flutter may recur, and it may get worse even with treatment, adds MedlinePlus. (reference.com)
  • What Does It Mean When Your Heart Flutters? (reference.com)
  • Getting a pacemaker can cure individual bouts of intermittent atrial fibrillation, but it doesn't cure the underlying condition, so the heart may still hav. (reference.com)
  • Relationship of the following variables with the occurrence of AFib during follow-up (12 months) was investigated: CPAP initiation, hypertension, BMI, underlying structural heart disease, left atrial diameter, and AFib documentation prior to ablation. (rti.org)
  • The analysis included 110 studies comprising 7946 patients (79% male, 59.8±0.5 years, 43% left atrial enlargement, 49% heart disease, 16±12 months follow up). (ahajournals.org)
  • With the state-of-the-art equipment and technology at the Meijer Heart Center, you are in the best place to access the latest treatments for atrial fibrillation. (spectrumhealth.org)
  • It feels like a fluttering or racing heart, or like your heart skips a beat. (dmc-modesto.com)
  • Atrial fibrillation and flutter occur when parts of the heart do not beat regularly. (webmd.com)
  • The rapid heart rate commonly produce by atrial flutter most often leads to pronounced palpitations, dizziness , fatigue, and dyspnea (breathlessness). (verywellhealth.com)
  • Atrial flutter can also produce a sudden worsening of symptoms in people who have heart failure . (verywellhealth.com)
  • Atrial flutter is also seen in people who have had previous heart surgery. (verywellhealth.com)
  • As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES). (bioportfolio.com)
  • Among those with atrial flutter 16% were attributable to heart failure and 12% to chronic obstructive lung disease. (onlinejacc.org)
  • At highest risk of developing atrial flutter are men, the elderly and individuals with preexisting heart failure or chronic obstructive lung disease. (onlinejacc.org)
  • Furthermore, F waves in IDAFL may be "atypical" in patients with atrial enlargement, heart failure, factors favoring atrial fibrillation ( 6 ), or varying bi-atrial activation ( 7,8 ). (onlinejacc.org)
  • For atrial fibrillation, several experienced teams of electrophysiologists in US heart centers claim they can achieve up to a 75% success rate. (wikipedia.org)
  • Young people with AF with paroxysmal, or intermittent, AF therefore have an increased chance of success with an ablation since their heart has not undergone atrial remodeling yet. (wikipedia.org)
  • Since 2010, Kowey has participated in multinational research initiatives including the AF-SCREEN International Collaboration, a group of 60 heart care experts who drafted a report advocating for markedly increased screenings for atrial fibrillation (AF), especially among patients 65 years and older. (wikipedia.org)
  • In 2007 Friðrik had a heart surgery to correct an atrial flutter problem. (wikipedia.org)
  • Heart rate patterns following vibroacoustic stimulation has resulted in serious negative consequences such as atrial flutter and bradycardia. (wikipedia.org)
  • Holt-Oram syndrome - both the osteium secundum and osteum primum types of ASD are associated with Holt-Oram syndrome Lutembacher's syndrome - the presence of a congenital ASD along with acquired mitral stenosis The many types of atrial septal defects are differentiated from each other by whether they involve other structures of the heart and how they are formed during the developmental process during early fetal development. (wikipedia.org)
  • This is sometimes known as an endocardial cushion defect because it often involves the endocardial cushion, which is the portion of the heart where the atrial septum meets the ventricular septum and the mitral valve meets the tricuspid valve. (wikipedia.org)
  • Because the human heart is a four chambered organ, there are atrial systole, atrial diastole, ventricular systole and ventricular diastole. (wikipedia.org)
  • Pacemakers in this role are usually programmed to enforce a minimum heart rate and to record instances of atrial flutter and atrial fibrillation, two common secondary conditions that can accompany third-degree AV block. (wikipedia.org)
  • P waves: Upright, consistent, and normal in morphology (if no atrial disease) P-R interval: Between 0.12-0.20 seconds and shortens with increasing heart rate QRS complex: Less than 0.12 seconds, consistent, and normal in morphology. (wikipedia.org)
  • The U.S. label for dronedarone includes a boxed warning, stating that dronedarone is contraindicated in patients with NYHA Class IV heart failure, with NYHA Class II-III heart failure with a recent decompensation requiring hospitalization or referral to a specialized heart failure clinic, or with permanent atrial fibrillation. (wikipedia.org)
  • The risk of systemic embolization (atrial clots migrating to other organs) depends strongly on whether there is an underlying structural problem with the heart (e.g. mitral stenosis) and on the presence of other risk factors, such as diabetes and high blood pressure. (wikipedia.org)
  • Heterotaxy syndrome with atrial isomerism occurs in 1 out of every 10,000 live births and is associated with approximately 3% of congenital heart disease cases. (wikipedia.org)
  • In either instance, the apex of the heart will be poorly positioned, which should alert a clinician of the likelihood of atrial isomerism. (wikipedia.org)
  • Complications of familial atrial fibrillation can occur at any age, although some people with this heart condition never experience any health problems associated with the disorder. (wikipedia.org)
  • Premature heart beats come in two different types, premature atrial contractions and premature ventricular contractions. (wikipedia.org)
  • two to four or more pounds per week), palpitations (sensation of racing heart-rate, skipping beats, long pauses between beats, or fluttering), and chest pain. (wikipedia.org)
  • Prevention of atrial flutter focuses on controlling or preventing the risk factors. (uhhospitals.org)
  • 2014 AATS guidelines for the prevention and management of perioperative atrial fibrillation and flutter for thoracic surgical procedures. (nih.gov)
  • Prevention includes decreasing risk factors, as well as possibly aspirin, statins, surgery to open up the arteries to the brain in those with problematic narrowing, and warfarin in those with atrial fibrillation. (wikipedia.org)
  • The diagnosis of atrial flutter was confirmed by the treating general practitioner or by research physicians and a cardiologist. (thefreedictionary.com)
  • Echocardiographic diagnosis of atrial flutter in a neonate. (bioportfolio.com)