Atrial premature complexes. Medical search

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.

A type of cardiac arrhythmia with premature contractions of the HEART VENTRICLES. It is characterized by the premature QRS complex on ECG that is of abnormal shape and great duration (generally >129 msec). It is the most common form of all cardiac arrhythmias. Premature ventricular complexes have no clinical significance except in concurrence with heart diseases.

An antiarrhythmia agent used primarily for ventricular rhythm disturbances.

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.

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.

Abnormally low potassium concentration in the blood. It may result from potassium loss by renal secretion or by the gastrointestinal route, as by vomiting or diarrhea. It may be manifested clinically by neuromuscular disorders ranging from weakness to paralysis, by electrocardiographic abnormalities (depression of the T wave and elevation of the U wave), by renal disease, and by gastrointestinal disorders. (Dorland, 27th ed)

A generic expression for any tachycardia that originates above the BUNDLE OF HIS.

A group of cardiac arrhythmias in which the cardiac contractions are not initiated at the SINOATRIAL NODE. They include both atrial and ventricular premature beats, and are also known as extra or ectopic heartbeats. Their frequency is increased in heart diseases.

Information systems, usually computer-assisted, designed to store, manipulate, and retrieve information for planning, organizing, directing, and controlling administrative activities associated with the provision and utilization of radiology services and facilities.

A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)

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.

Agents that prevent clotting.

An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide.

System established by the World Health Organization and the International Committee on Thrombosis and Hemostasis for monitoring and reporting blood coagulation tests. Under this system, results are standardized using the International Sensitivity Index for the particular test reagent/instrument combination used.

Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION.

A condition that is characterized by episodes of fainting (SYNCOPE) and varying degree of ventricular arrhythmia as indicated by the prolonged QT interval. The inherited forms are caused by mutation of genes encoding cardiac ion channel proteins. The two major forms are ROMANO-WARD SYNDROME and JERVELL-LANGE NIELSEN SYNDROME.

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.

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.

Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)

The small mass of modified cardiac muscle fibers located at the junction of the superior vena cava (VENA CAVA, SUPERIOR) and right atrium. Contraction impulses probably start in this node, spread over the atrium (HEART ATRIUM) and are then transmitted by the atrioventricular bundle (BUNDLE OF HIS) to the ventricle (HEART VENTRICLE).

The chambers of the heart, to which the BLOOD returns from the circulation.

Computer-based systems for use in personnel management in a facility, e.g., distribution of caregivers with relation to patient needs.

The number of times the HEART VENTRICLES contract per unit of time, usually per minute.

The hollow, muscular organ that maintains the circulation of the blood.

A plant genus of the family LAMIACEAE that contains phenylpropanoids.

The veins that return the oxygenated blood from the lungs to the left atrium of the heart.

Abnormally rapid heartbeats with sudden onset and cessation.

Use of a balloon catheter for dilation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of BALLOON DILATION in coronary arteries, ANGIOPLASTY, BALLOON, CORONARY is available.

Dilation of an occluded coronary artery (or arteries) by means of a balloon catheter to restore myocardial blood supply.

Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.

Reconstruction or repair of a blood vessel, which includes the widening of a pathological narrowing of an artery or vein by the removal of atheromatous plaque material and/or the endothelial lining as well, or by dilatation (BALLOON ANGIOPLASTY) to compress an ATHEROMA. Except for ENDARTERECTOMY, usually these procedures are performed via catheterization as minimally invasive ENDOVASCULAR PROCEDURES.

Radiography of the vascular system of the heart muscle after injection of a contrast medium.

An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.

The veins and arteries of the HEART.

An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).

NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).

Patterns (real or mathematical) which look similar at different scales, for example the network of airways in the lung which shows similar branching patterns at progressively higher magnifications. Natural fractals are self-similar across a finite range of scales while mathematical fractals are the same across an infinite range. Many natural, including biological, structures are fractal (or fractal-like). Fractals are related to "chaos" (see NONLINEAR DYNAMICS) in that chaotic processes can produce fractal structures in nature, and appropriate representations of chaotic processes usually reveal self-similarity over time.

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.

Disorders characterized by hypersomnolence during normal waking hours that may impair cognitive functioning. Subtypes include primary hypersomnia disorders (e.g., IDIOPATHIC HYPERSOMNOLENCE; NARCOLEPSY; and KLEINE-LEVIN SYNDROME) and secondary hypersomnia disorders where excessive somnolence can be attributed to a known cause (e.g., drug affect, MENTAL DISORDERS, and SLEEP APNEA SYNDROME). (From J Neurol Sci 1998 Jan 8;153(2):192-202; Thorpy, Principles and Practice of Sleep Medicine, 2nd ed, p320)

A condition characterized by recurrent episodes of daytime somnolence and lapses in consciousness (microsomnias) that may be associated with automatic behaviors and AMNESIA. CATAPLEXY; SLEEP PARALYSIS, and hypnagogic HALLUCINATIONS frequently accompany narcolepsy. The pathophysiology of this disorder includes sleep-onset rapid eye movement (REM) sleep, which normally follows stage III or IV sleep. (From Neurology 1998 Feb;50(2 Suppl 1):S2-S7)

A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.

Simultaneous and continuous monitoring of several parameters during sleep to study normal and abnormal sleep. The study includes monitoring of brain waves, to assess sleep stages, and other physiological variables such as breathing, eye movements, and blood oxygen levels which exhibit a disrupted pattern with sleep disturbances.

The effect of environmental or physiological factors on the driver and driving ability. Included are driving fatigue, and the effect of drugs, disease, and physical disabilities on driving.

The time from the onset of a stimulus until a response is observed.

A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.

A suspension of metallic gold particles.

A family of membrane-associated proteins responsible for the attachment of the cytoskeleton. Erythrocyte-related isoforms of ankyrin attach the SPECTRIN cytoskeleton to a transmembrane protein (ANION EXCHANGE PROTEIN 1, ERYTHROCYTE) in the erythrocyte plasma membrane. Brain-related isoforms of ankyrin also exist.

In the YIN-YANG system of philosophy and medicine, a lack of vital energy (called yangxu in Chinese). It manifests itself in various systemic and organic diseases. (The Pinyin Chinese-English Dictionary, 1979)

Pain in the breast generally classified as cyclical (associated with menstrual periods), or noncyclical, i.e. originating from the breast or nearby muscles or joints, ranging from minor discomfort to severely incapacitating.

A publication issued at stated, more or less regular, intervals.

A plant genus of the family ARACEAE that contains pinellian (an acidic polysaccharide). The plant is an ingredient of some traditional Asian medicinal mixtures including sho-saiko-to, saiko-keishi-to, and banxia houpu decoction.

A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.

Exercise-induced uncommon atrioventricular nodal reentrant tachycardia with sick sinus syndrome: a case report. (1/58)

Exercise seldom provokes tachycardia in patients with paroxysmal supraventricular tachycardia (PSVT). This report presents a case of exercise-induced uncommon atrioventricular nodal reentrant tachycardia (AVNRT) with sick sinus syndrome. Treadmill exercise testing provoked AVNRT of long RP' with good reproducibility. Uncommon AVNRT was confirmed by the lack of atrial pre-excitation during PSVT and para-Hisian pacing. The patient has been successfully treated with verapamil and DDD pacing for 5 years. (+info)

Initiation of atrial fibrillation by ectopic beats originating from the pulmonary veins: electrophysiological characteristics, pharmacological responses, and effects of radiofrequency ablation. (2/58)

BACKGROUND: Atrial fibrillation (AF) can be initiated by ectopic beats originating from the atrial or great venous tissues. This study investigated the anatomic characteristics and electrophysiological properties of pulmonary veins (PVs), as well as the possible mechanisms and response to drugs of ectopic foci, and assessed the effects of radiofrequency (RF) ablation on AF initiated by ectopic beats originating from PVs. METHODS AND RESULTS: Seventy-nine patients with frequent episodes of paroxysmal AF and 10 control patients were included. Distal PVs showed the shortest effective refractory periods (ERPs), and right superior PVs showed a higher incidence of intra-PV conduction block than left superior PVs. Superior and left PVs had longer myocardial sleeves than inferior and right PVs, respectively. These electrophysiological characteristics were similar between AF and control patients. Propranolol, verapamil, and procainamide suppressed ectopic beats that originated from the PVs. Of 116 ectopic foci that initiated AF, 103 (88.8%) originated from PVs. A mean of 7+/-3 RF applications completely eliminated 110 ectopic foci (94.8%). During the 6+/-2-month follow-up period, 68 patients (86. 1%) were free of AF without any antiarrhythmic drugs. Follow-up transesophageal echocardiogram showed 42.4% of ablated PVs had focal stenosis. One patient had mild exertional dyspnea after ablation, but it resolved 3 months later; 1 patient had onset of mild exertional dyspnea 5 months after ablation. CONCLUSIONS: Electrophysiological characteristics of PVs are different from those in the atria. Ectopic beats from PVs can initiate AF, and beta-adrenergic receptor blocker, calcium channel blockers, and sodium channel blockers can suppress these ectopic beats. Careful mapping and elimination of these ectopic foci can cure paroxysmal AF. (+info)

Altered complexity and correlation properties of R-R interval dynamics before the spontaneous onset of paroxysmal atrial fibrillation. (3/58)

BACKGROUND: Trigger mechanisms for the onset of paroxysmal atrial fibrillation (AF) in patients without structural heart disease are not well established. New analysis methods of heart rate (HR) variability based on nonlinear system theory may reveal features and abnormalities in R-R interval behavior that are not detectable by traditional analysis methods. The purpose of this study was to reveal possible alterations in the dynamics of R-R intervals before the spontaneous onset of paroxysmal AF. METHODS AND RESULTS: Traditional time and frequency domain HR variability indices, along with the short-term scaling exponent alpha(1) and approximate entropy (ApEn), were analyzed in 20-minute intervals before 92 episodes of spontaneous, paroxysmal AF in 22 patients without structural heart disease. Traditional HR variability measures showed no significant changes before the onset of AF. A progressive decrease occurred both in ApEn (1.09+/-0.26 120 to 100 minutes before AF; 0.88+/-0.24 20 to 0 minutes before AF; P<0.001) and in alpha(1) (1.01+/-0.28 120 to 100 minutes before AF, 0.89+/-0.28 20 to 0 minutes before AF; P<0.05) before the AF episodes. Both ApEn (0. 89+/-0.27 versus 1.02+/-0.30; P<0.05) and alpha(1) (0.91+/-0.28 versus 1.27+/-0.21; P<0.001) were also lower before the onset of AF compared with values obtained from matched healthy control subjects. CONCLUSIONS: A decrease in the complexity of R-R intervals and altered fractal properties in short-term R-R interval dynamics precede the spontaneous onset of AF in patients with no structural heart disease. Further studies are needed to determine the physiological correlates of these new, nonlinear HR variability measures. (+info)

Cardiac arrhythmias and stroke: increased risk in men with high frequency of atrial ectopic beats. (4/58)

BACKGROUND AND PURPOSE: With the exception of atrial fibrillation (AF), little scientific attention has been given the associations between cardiac arrhythmias and incidence of stroke. We sought to study whether atrial and ventricular arrhythmias assessed during a 24-hour ambulatory ECG registration are associated with incidence of stroke. METHODS: The population-based cohort "Men Born in 1914" was examined with 24-hour ambulatory ECG registrations at 68 years of age. Four hundred two men without previous myocardial infarction or stroke were included, and 236 of them had hypertension (>/=160/95 mm Hg or treatment). Fourteen-year rates of stroke (fatal and nonfatal) and all-cause mortality were updated from national and regional registers. Frequent or complex ventricular arrhythmias was defined as Lown class 2 to 5. A high frequency of atrial ectopic beats (AEB) was defined as the fifth quintile (ie, >/=218 AEB per 24 hours). RESULTS: Fifty-eight men suffered a first stroke during the follow-up. Stroke rates (per 1000 person-years) among men with AF (n=14), with frequent AEB (n=77), and without AF or frequent AEB (n=311) were 34.5, 19.5, and 11.6, respectively. The corresponding values among men with hypertension were 40.7, 32.3, and 14.7, respectively. Frequent AEB (compared with absence of AF and frequent AEB) was significantly associated with stroke among all men (relative risk=1.9; 95% CI, 1.02 to 3.4; P:=0.04) and among hypertensive men (relative risk=2.5; 95% CI, 1.3 to 4.8; P:=0.009) after adjustments for potential confounders. The increased stroke rates among men with Lown class 2 to 5 did not reach statistical significance. CONCLUSIONS: A high frequency of AEB is associated with an increased incidence of stroke. (+info)

Evaluation of post-repolarization refractoriness for conduction block in cardiac muscle: studies in an artificial isthmus in the canine right atrium. (5/58)

Post-repolarization refractoriness (PRR) is an important factor in determining conduction block and is the difference between the effective refractory period (ERP) and the duration of the monophasic action potential (MAPD). In the present study, conduction block in an artificial isthmus in the canine atrium was evaluated and the coupling interval of a premature beat, which caused the block, was defined as the block coupling interval (BCI). The usefulness of this value was also evaluated. Radiofrequency linear ablation was performed on the right atrial surface parallel to the atrioventricular groove in 5 mongrel dogs, and an artificial isthmus (8-10mm wide and 25-30mm long) was created. Fourteen simultaneous unipolar recordings were performed in the isthmus with a resolution of 1.2 mm. Single extra-stimuli with basic drive train were delivered to induce conduction block in the isthmus and when it occurred, the coupling interval at the recording site just proximal to the site of the block was defined as the BCI. At the site of the block, the ERP and MAPD at each drive cycle length were measured. The PRR was calculated using 2 different formulae: (1) [ERP-MAPD], and (2) [BCI-MAPD]. It was found that each value was shortened in accordance with the shortening of the basic drive cycle length. In all basic drive trains, BCI>ERP>MAPD, and [ERP-MAPD] was always shorter than [BCI-MAPD]. In the shorter cycle length of basic drives, the difference between [ERP-MAPD] and [BCI-MAPD] was more prominent. In the artificial isthmus model in the canine atrium, BCI was always longer than the ERP measured at the same site as the block. Because the ERP may not directly reflect the block phenomenon, the electrophysiologic evaluation should use the BCI instead, as in the PRR evaluation. (+info)

The class III antiarrhythmic drugs dofetilide and sotalol prevent AF induction by atrial premature complexes at doses that fail to terminate AF. (6/58)

BACKGROUND: Clinical trials suggest that sotalol and dofetilide are much more effective in preventing atrial fibrillation (AF) than in terminating it. This study evaluated potential mechanisms of discordant sotalol and dofetilide effects on AF termination vs. prevention. METHODS: We applied 240-electrode epicardial mapping and programmed stimulation in a vagotonic dog model of AF before and after dofetilide or sotalol. RESULTS: Under control conditions, sustained AF could be induced by single S(2) extrastimuli that caused unidirectional block and macroreentry. Sotalol (2 mg/kg) and dofetilide (0.04 mg/kg) failed to terminate AF in any dog, but prevented AF induction by S(2) stimuli in 19/22 (86%) and 4/5 (80%) of animals, respectively. With sotalol and dofetilide, unidirectional block still occurred, but wavefront reentry failed. The prevention of S(2)-induced reentry was related to large increases in the effective refractory period (ERP) at a BCL of 1000 ms, leading to ERPs that exceeded the conduction delay following S(2). Reverse use-dependent effects resulted in smaller ERP increases at BCLs closer to the AF cycle length. Although the number of zones of reactivation per cycle during sustained AF were decreased by sotalol and dofetilide, the changes were small and insufficient to terminate AF. CONCLUSIONS: Sotalol and dofetilide prevent AF initiation by premature depolarizations at doses that fail to terminate vagotonic AF, by increasing ERP at the basic cycle length beyond the associated conduction delay that leads to reentry. (+info)

Giant negative T waves during interferon therapy in a patient with chronic hepatitis C. (7/58)

Interferon-alpha (IFN-alpha) has been widely used for treatment of chronic hepatitis C in Japan. In general, cardiovascular adverse reactions are rare in association with IFN-alpha therapy. Here, a 64-year-old man with chronic active hepatitis C complained of fatigue, palpitation and depression, and developed atrial fibrillation with prominent negative T waves during IFN-alpha therapy. Echocardiogram showed septal and apical hypertrophy. Three days after discontinuation of IFN-alpha, subjective symptoms and atrial fibrillation subsided. It is unclear whether or not IFN-alpha induced the giant negative T waves with apical hypertrophy. We might observe the developing course of hepatitis C virus (HCV)-related myocardial hypertrophy by chance. Cardiovascular toxicity should be carefully monitored during IFN-alpha therapy even in patients with minor cardiac disease, such as premature ventricular contracture (PVC) and mild hypertension. (+info)

Chronic atrial fibrillation in patients with rheumatic heart disease: mapping and radiofrequency ablation of flutter circuits seen at initiation after cardioversion. (8/58)

BACKGROUND: There is little information concerning mapping and radiofrequency ablation (RFA) of arrhythmias seen during reinduction of atrial fibrillation (AF) after pharmacological and/or electrical cardioversion in patients with chronic AF and rheumatic heart disease. METHODS AND RESULTS: Seventeen patients with rheumatic heart disease and symptomatic chronic AF underwent multisite atrial mapping during reinduction of AF after cardioversion. An organized atrial arrhythmia of varying duration was seen to precede the AF in all patients. The earliest atrial activity during this organized rhythm was near the coronary sinus ostium (CS OS) in 14 patients and along the left side of the interatrial septum (IAS) in 3 patients. RFA was performed in 16 patients (14 near the CS OS and 2 along the IAS). Postablation AF was inducible in 1 patient in whom RFA was preformed near the CS OS and in both patients when it was performed along the IAS. At a follow-up of 6 to 56 weeks (mean, 32 weeks), 10 of the 13 patients who had successful ablation were in sinus rhythm. All patients in whom AF was reinducible immediately after RFA continue to be in AF. CONCLUSIONS: Induced AF in patients with rheumatic heart disease begins as a rapid organized arrhythmia with earliest atrial activity near the CS OS in most patients. RFA targeting the region of the CS OS is successful in suppressing the arrhythmia immediately in most of the patients and in most on follow-up. (+info)

... an endoscopic technique for controlling hemorrhage Atrial premature complexes, a type of premature heart beat or irregular ... a powerful oxidizer used in solid rocket motors Anaphase-promoting complex, a complex of several proteins activated during ... mutations in which can cause colon cancer Anaphase-promoting complex, a ubiquitin ligase cell cycle protein Antigen-presenting ...

https://en.wikipedia.org/wiki/APC

The other rare E.C.G. changes include deformity of QRS complexes, prolongation of PR interval, atrial premature beats, and ... atrial tachycardia. In adults, fatal cases have been reported with a total dose of 0.6 G. or less. The incidence of toxic heart ...

https://en.wikipedia.org/wiki/Amoebic_liver_abscesses

Atrial premature complexes (APCs) do not have a compensatory pause since they reset the sinus node but atrial or ... In atrial bigeminy, the other "twin" is a premature atrial contraction (PAC). ... When the atrial rhythm is irregular (as in atrial fibrillation or sinus arrythmia) the presence of bigeminy depends on the ... The two beats are figuratively similar to two twins (hence bi- + gemini). The ectopic beat is typically a premature ventricular ...

https://en.wikipedia.org/wiki/Ventricular_bigeminy

... not preceded by any atrial complex or P wave or preceded by an abnormal P wave with a shorter PR interval. Rarely, the abnormal ... Premature atrial contraction Premature ventricular contraction Tipton MJ, Kelleher PC, Golden FS Institute of Naval Medicine, ... On the surface ECG, premature junctional contractions will appear as a normally shaped ventricular complex or QRS complex, ... Premature junctional contractions (PJCs), also called atrioventricular junctional premature complexes or junctional ...

https://en.wikipedia.org/wiki/Premature_junctional_contraction

It is more often misinterpreted as a premature ventricular complex. It is named for Richard Ashman (of New Orleans) (1890 -1969 ... Harrigan, RA; Garg, M (Dec 2013). "An interesting cause of wide complex tachycardia: Ashman's phenomenon in atrial fibrillation ... Ashman beats are described as wide complex QRS complexes that follow a short R-R interval preceded by a long R-R interval. This ... Oreto, G; Luzza, F; Satullo, G; Donato, A; Carbone, V; Calabrò, MP (Sep 2009). "[Wide QRS complex tachycardia: an old and new ...

https://en.wikipedia.org/wiki/Ashman_phenomenon

... s (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a ... This can be either a premature atrial contraction or a premature impulse from the atrioventricular node. SVES should be viewed ... Often, hypertension goes hand in hand with various atrial fibrillations including premature atrial contractions (PACs).[5] ... narrow QRS complex. However, if the atrial beat is premature enough, it may reach the atrioventricular node during its ...

https://en.wikipedia.org/wiki/Skipped_beat

Initiation of AVRT may be through a premature impulse of atrial, junctional, or ventricular origin. Acute management is as for ... would appear as a narrow-complex SVT. Between episodes of tachycardia the affected person is likely to be asymptomatic; however ... Then, the electrical impulse pathologically passes back into the atria via the accessory pathway, causing atrial contraction, ...

https://en.wikipedia.org/wiki/Atrioventricular_reentrant_tachycardia

Procainamide can be used to treat atrial fibrillation in the setting of Wolff-Parkinson-White syndrome, and to treat wide ... Class Ib agents are indicated for the treatment of ventricular tachycardia and symptomatic premature ventricular beats, and ... complex hemodynamically stable tachycardias. Oral procainamide is no longer being manufactured in the US, but intravenous ... While procainamide and quinidine may be used in the conversion of atrial fibrillation to normal sinus rhythm, they should only ...

https://en.wikipedia.org/wiki/Sodium_channel_blocker

Atrial repolarization occurs and is masked during the QRS complex by ventricular depolarization on the ECG. The last event of ... This prevents premature relaxation, maintaining initial contraction until the entire myocardium has had time to depolarize and ... The delay in the AV node forms much of the PR segment on the ECG, and part of atrial repolarization can be represented by the ... The spread of electrical activity through the ventricular myocardium produces the QRS complex on the ECG. ...

https://en.wikipedia.org/wiki/Electrical_conduction_system_of_the_heart

... atrial fibrillation, atrial flutter, and paroxysmal supraventricular tachycardia). An AV-junctional rhythm, or atrioventricular ... Impulses originating within or below the bundle of His in the AV node will produce a wide QRS complex with heart rates between ... For infants, bradycardia is defined as a heart rate less than 100 BPM (normal is around 120-160 BPM) . Premature babies are ... Those above the bundle of His, also known as junctional, will typically range between 40 and 60 BPM with a narrow QRS complex. ...

https://en.wikipedia.org/wiki/Bradycardia

Premature infants with immature brains and reflex systems are at high risk for central sleep apnea syndrome, even if these ... CSA with Cheyne-Stokes breathing is characterized by at least one of the criteria of Primary CSA or the presence of atrial ... located in the region of the human brain known as the pre-Botzinger complex, are imbalanced during sleep and fail to give the ... Premature babies who have the syndrome will generally outgrow it as they mature, provided that they receive careful enough ...

https://en.wikipedia.org/wiki/Central_sleep_apnea

Atrial flutter Premature atrial rhythm (or tachycardia) Third degree heart block Ventricular ectopics Ventricular tachycardia ... The exact physiologic mechanism of jugular venous distention with a positive test is much more complex and the commonly ... The peak of the 'a' wave demarcates the end of atrial systole. The x descent follows the 'a' wave and corresponds to atrial ... The absence of 'a' waves may be seen in atrial fibrillation. An elevated JVP is the classic sign of venous hypertension (e.g. ...

https://en.wikipedia.org/wiki/Jugular_venous_pressure

According to the Centers for Disease Control and Prevention (CDC), most birth defects are believed to be caused by a complex ... Rubella can also lead to atrial and ventricular septal defects in the heart. If exposed to rubella in the second trimester, the ... Exposure during the first eight weeks of development can also lead to premature birth and fetal death. These numbers are ... Around a 5% increase in the incidence of ventricular septal defects, atrial septal defects, and patent ductus arteriosus in ...

https://en.wikipedia.org/wiki/Birth_defects

According to the CDC, most birth defects are believed to be caused by a complex mix of factors including genetics, environment ... Rubella can also lead to atrial and ventricular septal defects in the heart. If exposed to rubella in the second trimester, the ... pre-mature births, and stillbirth. These complications not only may put the child at risk, but also the mother.[74] ... Around a 5% increase in the incidence of ventricular septal defects, atrial septal defects, and patent ductus arteriosus in ...

https://en.wikipedia.org/wiki/Congenital_disorder

Atrial fibrillation and atrial flutter without rapid ventricular response. *Premature atrial contraction (PACs) and premature ... For example, an "irregularly irregular" QRS complex without P waves is the hallmark of atrial fibrillation; however, other ... QRS complex The QRS complex represents the rapid depolarization of the right and left ventricles. The ventricles have a large ... Absent P waves with "irregularly irregular" QRS complexes is the hallmark of atrial fibrillation ...

https://en.wikipedia.org/wiki/EKG

Atrial Fibrillation Chapter 247: Approach to Ventricular Arrhythmias Chapter 248: Premature Ventricular Beats, Non-Sustained ... The Major Histocompatibility Complex Chapter 344: Primary Immune Deficiency Diseases Section 2: Disorders of Immune-Mediated ... Focal Atrial Tachycardia Chapter 244: Paroxysmal Supraventricular Tachycardias Chapter 245: Common Atrial Flutter, ... Atrial Myxoma and Other Cardiac Tumors Section 5: Coronary and Peripheral Vascular Disease Chapter 267: Ischemic Heart Disease ...

https://en.wikipedia.org/wiki/Harrison's_Principles_of_Internal_Medicine

PRDM14 is a pluripotency regulator and MED24 is a mediator complex essential in the maintenance of pluripotency. In wild-type ... Variants identified included a premature stop variant in exon 3, frame-shift variants in exon 3 and a frameshift variant in ... Congenital defects such as a thinned atrial septum, ventricular septal defects, patent ductus arteriosus, dysplastic kidney and ... Mutations in the SON gene and or SON haploinsufficiency compromises SON-mediated RNA splicing and contributes to the complex ...

https://en.wikipedia.org/wiki/ZTTK_syndrome

An ectopic pacemaker located in the atria is known as an atrial pacemaker and can cause the atrial contraction to be faster.[10 ... When an ectopic pacemaker initiates a beat, premature contraction occurs. A premature contraction will not follow the normal ... However the QRS complex and T waves appear relatively normal.[10] Conversely, during junctional ectopic activity the P wave is ... frequently absent or can be hidden in the QRS complex.[11] References[edit]. *^ a b c d Phibbs, B. (1963). "Paroxysmal Atrial ...

https://en.wikipedia.org/wiki/Ectopic_focus

Sinus bradycardia Premature atrial contractions (PACs) Wandering atrial pacemaker Atrial tachycardia Multifocal atrial ... Long QT syndrome is another complex problem in the heart and has been labeled as an independent factor in mortality. There are ... Extra beats include premature atrial contractions, premature ventricular contractions and premature junctional contractions. ... These are mainly the result of premature atrial contractions, usually give no symptoms, and have little consequence. However, ...

https://en.wikipedia.org/wiki/Arrhythmia

However, those with CPVT may develop a less serious heart rhythm disturbance called atrial fibrillation, which can be detected ... When the concentration of calcium is low, calsequestrin monomers form a complex with the proteins triadin and junctin, which ... Afterdepolarisations, if large enough, can trigger additional action potentials, premature ventricular contractions, or ... calsequestrin forms polymers that dissociate from the ryanodine receptor channel complex, removing the inhibitory response and ...

https://en.wikipedia.org/wiki/Catecholaminergic_polymorphic_ventricular_tachycardia

They may also develop a left atrial thrombus that embolizes, most commonly, to the terminal aorta creating acute pain and rear ... In individuals with aortic stenosis, after a premature ventricular contraction (PVC), the following ventricular contraction ... this method of screening is complex and is not cost-effective. Therefore, genetic testing in the United States is limited to ... family history of premature sudden death, and LVW thickness greater than 15 mm to 30 mm, on echocardiogram. "Spike and dome" ...

https://en.wikipedia.org/wiki/Hypertrophic_cardiomyopathy

Atrial fibrillation Electric shock Flatline Osborn wave Re-entry ventricular arrhythmia Ventricular flutter Baldzizhar, A; ... Diagnosis is by an electrocardiogram (ECG) showing irregular unformed QRS complexes without any clear P waves. An important ... who brought to attention the concept of the danger of premature ventricular beats occurring on a T wave.[citation needed] ... a term that he seems to have used to describe both atrial and ventricular fibrillation. John A. MacWilliam, a physiologist who ...

https://en.wikipedia.org/wiki/Ventricular_fibrillation

The QRS complex will also be narrow in LGL syndrome, as opposed to WPW, because ventricular conduction is via the His-Purkinje ... Premature contraction. *Atrial. *Junctional. *Ventricular. Pre-excitation syndrome. *Lown-Ganong-Levine. *Wolff-Parkinson-White ... Those with LGL syndrome have episodes of abnormal heart racing with a short PR interval and normal QRS complexes seen on their ... with normal QRS complex configuration and duration on their resting ECG.[1] A short PR interval found incidentally on an ECG ...

https://en.wikipedia.org/wiki/Lown–Ganong–Levine_syndrome

Adding to its complex toxicity, cocaine targets muscarinic acetylcholine, N-methyl-D-aspartate (NMDA), sigma, and kappa-opioid ... Studies have shown that cocaine usage during pregnancy triggers premature labor and may lead to abruptio placentae. Cocaine can ... "Cocaine-associated increase of atrial natriuretic peptides: an early predictor of cardiac complications in cocaine users?". ... Cocaine pharmacodynamics involve multiple complex mechanisms, although its half-life is short (~ 1 hour). This drug binds and ...

https://en.wikipedia.org/wiki/Cocaine_intoxication

Extra beats include premature atrial contractions, premature ventricular contractions, and premature junctional contractions. ... These studies are performed to assess complex arrhythmias, elucidate symptoms, evaluate abnormal electrocardiograms, assess ... Supraventricular tachycardias include atrial fibrillation, atrial flutter, and paroxysmal supraventricular tachycardia. ... Atrial fibrillation and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990.[55] Sudden cardiac death is ...

https://en.m.wikipedia.org/wiki/Cardiologist

Narrow QRS complexes are visible as well. Causes[edit]. MAT usually arises because of an underlying medical condition. Its ... Multifocal atrial tachycardia. Multifocal (or multiform) atrial tachycardia (MAT) is an abnormal heart rhythm,[1] specifically ... Management of multifocal atrial tachycardia consists mainly of the treatment of the underlying cause,[3] but if clinically ... Kastor JA (1990). "Multifocal Atrial Tachycardia". N Engl J Med. 322 (24): 1713-17. doi:10.1056/NEJM199006143222405. PMID ...

https://en.wikipedia.org/wiki/Multifocal_atrial_tachycardia

The source of the re-entry circuit can be identified by evaluating the morphology of the QRS complex in the V1 lead of a ... This is similar to the re-entrant circuits that are the cause of atrial flutter and the re-entrant forms of supraventricular ... Various diagnostic criteria have been developed to determine whether a wide complex tachycardia is ventricular tachycardia or a ... Stewart RB, Bardy GH, Greene HL (June 1986). "Wide complex tachycardia: misdiagnosis and outcome after emergent therapy". ...

https://en.wikipedia.org/wiki/V_tach

The decreased right atrial pressure and the increased left atrial pressure pushes the septum primum against the septum secundum ... Both include the whole body, but the general movements are slower and have a complex sequence of involved body parts, while the ... although premature birth can also result in low birth weight. Low birth weight increases risk for perinatal mortality (death ... described as premature by weight, to have a higher risk of secondary medical problems. ...

https://te.wikipedia.org/wiki/పిండం

It is now becoming clear that ankyrin-B exists in a biomolecular complex with the sodium potassium ATPase, sodium calcium ... Robaei, D; Ford, T; Ooi, SY (February 2015). "Ankyrin-B syndrome: a case of sinus node dysfunction, atrial fibrillation and ... "Ankyrin-B syndrome: enhanced cardiac function balanced by risk of cardiac death and premature senescence". PLOS ONE. 2 (10): ... The human ankyrin-B arrhythmogenic mutation (Glu1425Gly) blocks the formation of this complex, which provides a mechanism ...

https://en.wikipedia.org/wiki/ANK2

However, as the atrial baroreceptors increase their rate of firing and as they stretch due to the increased blood pressure, the ... The relationship between electrolytes and HR is complex, but maintaining electrolyte balance is critical to the normal wave of ... a resting heart rate above 65 beats per minute has been shown to have a strong independent effect on premature mortality; every ... There is a similar reflex, called the atrial reflex or Bainbridge reflex, associated with varying rates of blood flow to the ...

https://en.wikipedia.org/wiki/Heart_rate

Narrow complex *Sinus tachycardia, which originates from the sino-atrial (SA) node, near the base of the superior vena cava ... or wide complex tachycardias. Narrow and wide refer to the width of the QRS complex on the ECG. Narrow complex tachycardias ... Atrial fibrillation is one of the most common cardiac arrhythmias. In general, it is an irregular, narrow complex rhythm. ... They may be classified into narrow and wide complex based on the QRS complex.[4] Presented order of most to least common, they ...

https://en.wikipedia.org/wiki/Reflex_tachycardia

QRS complexes should be narrow, signifying that they are initiated by normal conduction of atrial electrical activity through ... Valvular atrial fibrillation refers to atrial fibrillation attributable to moderate to severe mitral valve stenosis or atrial ... 193,300 with atrial flutter (2015)[10]. Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm (arrhythmia) ... Left atrial appendage occlusion[edit]. There is tentative evidence that left atrial appendage occlusion therapy may reduce the ...

https://en.wikipedia.org/wiki/Atrial_fibrillation

Left atrial dimension. LA. Range 24 - 40 mm[16] Fractional shortening (FS) is the fraction of any diastolic dimension that is ... giving rise to premature ventricular contractions, also called ventricular extra beats. When these beats become grouped the ... pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and ... venae cavae, coronary sinus) → right atrium (atrial appendage, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve ...

https://en.wikipedia.org/wiki/Ventricle_(heart)

... not preceded by any atrial complex or P wave or preceded by an abnormal P wave with a shorter PR interval. Rarely, the abnormal ... Premature junctional contractions (PJCs), also called atrioventricular junctional premature complexes or junctional ... On the surface ECG, premature junctional contractions will appear as a normally shaped ventricular complex or QRS complex, ... Premature ventricular contraction. References[edit]. *^ Tipton MJ, Kelleher PC, Golden FS Institute of Naval Medicine, Gosport ...

https://en.wikipedia.org/wiki/Premature_junctional_contractions

... atrial arrhythmia,[3] first/second degree heart blocks, atrial fibrillation, syncope, elevated neck veins and jugular venous ... For patients with light-chain amyloidosis, the QRS complex pattern is skewed,[1] with poor R-waves of the chest leads.[3] ... amiodarone for patients with atrial fibrillation to prevent arrhythmias, and warfarin used after a cardioembolic episode.[1] ... Premature contraction. *Atrial. *Junctional. *Ventricular. Pre-excitation syndrome. *Lown-Ganong-Levine. *Wolff-Parkinson-White ...

https://en.wikipedia.org/wiki/Cardiac_amyloidosis

Digoxin is used to treat atrial fibrillation, atrial flutter and sometimes heart failure.[43] ... and protection of cells from premature aging, antioxidant activity, antioxidant content and antioxidant properties, and ... Extraction can be practical when the compound in question is complex.[80] ... plant extracts may have complex effects on the human body.[5] ...

https://en.wikipedia.org/wiki/Medicinal_plants

... atrial fibrillation, and premature ventricular contractions, and hypertension.[7] People with hyperthyroidism may experience ... George H. W. Bush, former U.S. president, developed new atrial fibrillation and was diagnosed in 1991 with hyperthyroidism due ... atrial fibrillation), which may lead to stroke. If the eyes are proptotic (bulging) enough that the lids do not close ... Immune complex). Foreign. *Henoch-Schönlein purpura. *Hypersensitivity vasculitis. *Reactive arthritis. *Farmer's lung ...

https://en.wikipedia.org/wiki/Graves

Complex multi-systemic diseases, such as rheumatic fever, were categorised only after the observation of large, hospital based ... Premature contraction. *Atrial. *Junctional. *Ventricular. Pre-excitation syndrome. *Lown-Ganong-Levine. *Wolff-Parkinson-White ...

https://en.wikipedia.org/wiki/Sydenham's_chorea

Evidence of a complex pattern of behavior or cognitive abnormalities inconsistent with developmental level in the following CNS ... Growth measurements must be adjusted for parental height, gestational age (for a premature infant), and other postnatal insults ... Ventricular septal defect most commonly seen, followed by an atrial septal defect. ... The IOM system requires structural or neurological impairment for a diagnosis of FAS, but also allows a "complex pattern" of ...

https://en.m.wikipedia.org/wiki/Fetal_alcohol_spectrum_disorder

Child-specific: premature epiphyseal closure and associated short stature, precocious puberty in boys, delayed puberty and ... Sullivan ML, Martinez CM, Gallagher EJ (1999). "Atrial fibrillation and anabolic steroids". The Journal of emergency medicine. ... "Comparison of crystal structures of human androgen receptor ligand-binding domain complexed with various agonists reveals ... For example, AAS may prematurely stop the lengthening of bones (premature epiphyseal fusion through increased levels of ...

https://en.m.wikipedia.org/wiki/Anabolic_steroid

It is now used in only a small number of people with refractory symptoms, who are in atrial fibrillation and/or who have ... CCM is particularly suitable for the treatment of heart failure with normal QRS complex duration (120 ms or less) and has been ... atrial fibrillation, valvular heart disease, excess alcohol use, infection, and cardiomyopathy of an unknown cause.[2][3] These ... people with coexisting atrial fibrillation, a prior embolic event, or conditions which increase the risk of an embolic event ...

https://en.wikipedia.org/wiki/Heart_failure

Although complex disorders often cluster in families, they do not have a clear-cut pattern of inheritance. This makes it ... Premature ovarian failure 7. *SOX10 *Waardenburg syndrome 4c. *Yemenite deaf-blind hypopigmentation syndrome ... Complex disorders are also difficult to study and treat, because the specific factors that cause most of these disorders have ... Studies which aim to identify the cause of complex disorders can use several methodological approaches to determine genotype- ...

https://en.wikipedia.org/wiki/Genetic_defects

Extra beats include premature atrial contractions, premature ventricular contractions and premature junctional contractions.[3] ... Long QT syndrome is another complex problem in the heart and has been labeled as an independent factor in mortality. There are ... These are mainly the result of premature atrial contractions, usually give no symptoms, and have little consequence. However ... Atrial fibrillation affects the upper chambers of the heart, known as the atria. Atrial fibrillation may be due to serious ...

https://en.m.wikipedia.org/wiki/Heart_arrhythmia

Atrial Premature Complexes - etiology - mortality - physiopathology Biomarkers - blood Denmark Disease-Free Survival Diuretics ... Ventricular Premature Complexes - diagnosis - etiology - mortality - physiopathology Abstract. Severe hypokalaemia can ... p-Potassium was inversely associated with frequency of premature ventricular complexes (PVCs) especially in combination with ...

https://arctichealth.org/en/list?q=topic%3A%22Atrial+Premature+Complexes+-+etiology+-+mortality+-+physiopathology%22&p=1&ps=&sort=title_sort+asc&language_facet=English

... or premature atrial complexes, are the most common of the heart arrhythmias. In most cases treatment is not needed or ... Frequent Premature Atrial Complexes Predict New Occurrence of Atrial Fibrillation and Adverse Cardiovascular Events. Europace ... Premature Atrial Complexes (PACs) The Most Common Type of Cardiac Arrhythmia By Richard N. Fogoros, MD, a board-certified ... Premature atrial complexes, or PACs, are "extra" heartbeats that arise within the atria of the heart. PACs are the most common ...

https://www.verywell.com/premature-atrial-complexes-pacs-1746248

... meet increased attention as a potential intermediary between sinus rhythm and atrial fibrillation (AF). Patients with even high ... Premature atrial complexes (PACs) meet increased attention as a potential intermediary between sinus rhythm and atrial ... Burden of Premature Atrial Complexes and Risk of Recurrent Stroke and Death in Patients with Mild to Moderate Ischemic Stroke. ... Detection of Atrial Fibrillation and Atrial Flutter by Pacemaker Device Interrogation After Transcatheter Aortic Valve ...

https://medworm.com/750780423/burden-of-premature-atrial-complexes-and-risk-of-recurrent-stroke-and-death-in-patients-with-mild-to/

... and premature ventricular complexes (PVCs), Ask a Doctor about diagnosis, treatment and medication for Long qt syndrome, Online ... Premature atrial complexes (PACs) and premature ventricular complexes (PVCs) - Online Doctor Chats ... Are PACs (premature atrial contractions) and PVCs (premature ventricular contractions)related to MVP (mitral valve prolapse)? ... Premature atrial complexes (PACs) and premature ventricular complexes (PVCs) Information about z- pac ...

http://www.healthcaremagic.com/doctorchatlogs/Premature-atrial-complexes-PACs-and-premature-ventricular-complexes-PVCs/47098

Premature atrial contractions (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a ... This can be either a premature atrial contraction or a premature impulse from the atrioventricular node. SVES should be viewed ... Often, hypertension goes hand in hand with various atrial fibrillations including premature atrial contractions (PACs).[5] ... narrow QRS complex. However, if the atrial beat is premature enough, it may reach the atrioventricular node during its ...

https://en.wikipedia.org/wiki/Skipped_beat

Clinical significance of additional ablation of atrial premature beats after catheter ablation for atrial fibrillation. In: ... Clinical significance of additional ablation of atrial premature beats after catheter ablation for atrial fibrillation. Yonsei ... Clinical significance of additional ablation of atrial premature beats after catheter ablation for atrial fibrillation. / Kim, ... Purpose: The clinical significance of post-procedural atrial premature beats immediately after catheter ablation for atrial ...

https://yonsei.pure.elsevier.com/en/publications/clinical-significance-of-additional-ablation-of-atrial-premature-

Extra beats include premature atrial contractions, premature ventricular contractions, and premature junctional contractions.[3 ... Long QT Syndrome is another complex problem in the heart and has been labeled as an independent factor in mortality. There are ... Atrial fibrillation affects the upper chambers of the heart, known as the atria. Atrial fibrillation may be due to serious ... Premature junctional contraction. Ventricular. *Premature ventricular contractions (PVCs), sometimes called ventricular extra ...

https://readtiger.com/wkp/en/Heart_arrhythmia

Introduction: Frequent premature atrial complexes (fPACs) predict increased risk of Atrial Fibrillation (AF). Risk factors for ... Abstract 16098: Risk Factors for Frequent Premature Atrial Complexes in a Ten Year Holter Cohort. Tushar Acharya, Vishnu K ... Abstract 16098: Risk Factors for Frequent Premature Atrial Complexes in a Ten Year Holter Cohort ... Abstract 16098: Risk Factors for Frequent Premature Atrial Complexes in a Ten Year Holter Cohort ...

http://circ.ahajournals.org/content/130/Suppl_2/A16098

... atrial premature complexes in cats including diagnosis and symptoms, pathogenesis, prevention, treatment, prognosis and more. ... Irritation of the atrial myocardium causes premature depolarization of a region of the atria which spreads across the atria to ... Atrial enlargementsecondary to cardiomyopathy especially hypertrophic Heart: hypertrophic cardiomyopathy.. *Atrial disease, eg ... Atrial irritation, eg pericarditis, bacteremia, cardiac surgery or catheterization.. *Drugs, eg digitalis toxicity, ...

https://vetstream.com/treat/felis/diseases/heart-atrial-premature-complexes

What is atrial flutter with variable AV block with premature ventricular or aberrantly conducted complexes? is same with AV ... What is atrial flutter with variable AV block with premature ventricular or aberrantly conducted complexes? is same with AV ... Can I have Atrial Flutter (AF) while wearing a pacemaker for complete heart block? Do I need ablation or it manag more Can I ... Have left atrial cavity dilated,,right ventricula more I have a couple situations with my heart. I had 2 Doppler done. Have ...

https://www.healthtap.com/user_questions/1385532-what-is-atrial-flutter-with-variable-av-block-with-premature-ventricular-or-aberrantly-conducted-com

Premature atrial complexes are common irregularities in heartbeats. They usually require no treatment except when they are ... Premature Atrial Complexes Symptoms. Premature atrial complexes usually do not cause symptoms, although you may sometimes feel ... How to Treat Premature Atrial Complexes. Premature atrial complexes are usually diagnosed with a Holter monitor, an ... Premature Atrial Complexes. Many people occasionally experiencepremature atrial complexes, a common type of heart arrhythmia. ...

https://www.newhealthadvisor.org/Premature-Atrial-Complexes.html

Review of the atrial ectopics and premature atrial contractions (PACs) with ectopic pacemaking tissue within the atria. Review ... AKA: Atrial ectopics, atrial extrasystoles, atrial premature beats, atrial premature depolarisations. Origin of Ectopic Beats. ... Atrial Ectopic and Premature Atrial Complex (PAC). These arise from ectopic pacemaking tissue within the atria. There is an ... Clinical Significance of Premature Atrial Complex (PAC). *PACs are a normal electrophysiological phenomenon not usually ...

https://litfl.com/premature-atrial-complex-pac/

... beats/complex), with emphasis on classification, ECG criteria, causes, symptoms and clinial management. Includes a complete e- ... Figure 1. Typical premature atrial contraction (beat / complex).. Figure 2. Atrial premature beat with retrograde P-wave.. The ... Premature atrial contraction (premature atrial beat / complex): ECG & clinical implications. Chapter contents Show ... The prevalence of premature atrial beats increase with age. It is considered normal to have a few premature atrial complexes ...

https://ecgwaves.com/topic/premature-atrial-contraction-beat-complex/

atrial fibrillation; atrial premature complexes; cryptogenic stroke; electrocardiography; projections and predictions; risk ... Holter-detected atrial premature beats [APBs], runs of atrial tachycardia, age, and left atrial enlargement) and subsequent AF ... Atrial premature beats predict atrial fibrillation in cryptogenic stroke: results from the EMBRACE trial.. Gladstone DJ1, ... Many ischemic strokes or transient ischemic attacks are labeled cryptogenic but may have undetected atrial fibrillation (AF). ...

https://www.ncbi.nlm.nih.gov/pubmed/25700289

We would like to send you information about relevant academic and professional offerings. Please check the box if you wish to receive such information. See our Privacy Policy. ...

http://www.clinicalvetadvisor3.com/book/chapter_00001-0360.php

Atrial Premature Complexes. Atrial Tachycardia. Atrial Fibrillation. Atrioventricular (AV) Junctional Premature Complexes & ...

https://www.routledge.com/ECG-for-the-Small-Animal-Practitioner-1st-Edition/Tilley-Burtnick/p/book/9781893441002

Atrial Fibrillation and Atrial Flutter.. Atrial Premature Complexes.. Atrial Septal Defect.. Atrial Standstill.. Atrial Wall ... Ventricular Premature Complexes.. Ventricular Septal Defect.. Ventricular Standstill (Asystole).. Ventricular Tachycardia. ... Eosinophilic Granuloma Complex.. Epididymitis / Orchitis.. Epilepsy, Idiopathic, Genetic, Primary.. Epiphora.. Episcleritis. ...

https://www.powells.com/book/blackwells-five-minute-veterinary-consult-canine-feline-4th-edition-9780781773607

Atrial Premature Complexes. A type of cardiac arrhythmia with premature atrial contractions or beats caused by signals ... Atrial premature complexes are characterized by premature P waves on ECG which are different in configuration from the P waves ... typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot ... Atrial fibrillation (AF) wavefront dynamics are complex and difficult to interpret, contributing to uncertainty about the ...

https://www.bioportfolio.com/resources/trial/107827/A-Retrospective-Study-of-the-Role-of-Thiazolidinediones-to-Reduce-the-Incidence.html

The risk of stroke and thromboembolism in atrial fibrillation is established. There are clear guidelines in anticoagulation ... Atrial Premature Complexes. A type of cardiac arrhythmia with premature atrial contractions or beats caused by signals ... Atrial premature complexes are characterized by premature P waves on ECG which are different in configuration from the P waves ... Atrial Flutter Has Less Left Atrial Spontaneous Contrast and Higher Left Atrial Appendage Emptying Velocity Compared with ...

https://www.bioportfolio.com/resources/pmarticle/1888264/Atrial-Flutter-Has-Less-Left-Atrial-Spontaneous-Contrast-and-Higher-Left-Atrial.html

... ventricular diastolic function and left atrial reverse remodeling after catheter ablation of premature ventricular complexes. ... ventricular diastolic function and left atrial reverse remodeling after catheter ablation of premature ventricular complexes, ... ventricular diastolic function and left atrial reverse remodeling after catheter ablation of premature ventricular complexes. ... ventricular diastolic function and left atrial reverse remodeling after catheter ablation of premature ventricular complexes. ...

https://creighton.pure.elsevier.com/en/publications/improvement-of-left-ventricular-diastolic-function-and-left-atria

Arrhythmia; Atrial fibrillation; Treatment; Recurrence; Atrial premature complexes National Category Cardiac and Cardiovascular ... Higher burden of supraventricular ectopic complexes early after catheter ablation for atrial fibrillation is associated with ... Our aim was to investigate the association between post-procedural burden of supraventricular ectopic complexes (SVEC) and the ... risk of long-term atrial fibrillation (AF) recurrence. Methods and results A total of 125 patients undergoing catheter ablation ...

http://liu.diva-portal.org/smash/record.jsf?pid=diva2:1178279

Atrial Premature Complexes. Similar to VPCs, atrial premature complexes involveextra heart beats that occur alone or in series ... Ventricular Premature Complexes. Ventricular premature complexes (VPCs) are single beats that disrupt the usual sequence of ... Many people with atrial flutter develop atrial fibrillation over time. Atrial flutter can also make it harder for your heart to ... Premature Beats. Premature beats are early, extra heartbeats, often called "skipped beats." Premature beats can arise from the ...

http://www.mountsinai.org/care/heart/services/arrhythmia/types

A complex, a thing, this word, dint pay too much attention.. But premature atrial, this is key. That the atrium fires from ... but maybe we can say that all the P waves of the Atrial Tachycardia are to look the same, but by wondering Atrial pacemaker, it ... Not atrial flutter, since there you have the saw tooth multiple Ps for each QRS.. Not Sinus tachycardia, since there the Ps are ... WANDERING ATRIAL PACEMAKER. Take the E away from pacemaker and you have PAC maker, so it is a wondering, like by everywhere, ...

https://www.brainscape.com/flashcards/cardio-ekg-2706840/packs/4655517

Termination of a broad complex tachycardia by a premature atrial complex.. Selvaraj R, Arunprasath P, Babu E, Balachander J. ... Multiple inappropriate rate drop responses triggered by ventricular premature beats.. Babu E, George G, Balachander J, Selvaraj ... Sensitized near-infrared luminescence from Nd(III), Yb(III) and Er(III) complexes by energy-transfer from ruthenium 1,3-Bis([1, ... A selective, long-lived deep-red emissive ruthenium(II) polypyridine complexes for the detection of BSA. ...

https://www.ncbi.nlm.nih.gov/pubmed?cmd=search&term=Babu+E%5Bau%5D&dispmax=50

2. Palpitations may be from premature ventricular or atrial complexes. The best way to find out is an EKG and 24 hour holter ...

https://www.medhelp.org/posts/Heart-Disease/Post-angioplasty-stent-complications/show/253701

Premature atrial complexes in an ischemic stroke population and risk of recurrent stroke: a systematic review. Sejr, M. H., ... Death and thrombo-embolic risk after ablation of atrial flutter compared with atrial fibrillation: a nationwide cohort study. ... Disease progression after ablation for atrial flutter compared with atrial fibrillation: A nationwide cohort study. Skjøth, F. ... Atrial flutter and thromboembolic risk: a systematic review. Vadmann, H., Nielsen, P. B., Hjortshøj, S. P., Riahi, S., ...

https://vbn.aau.dk/da/organisations/aalborg-af-study-group/publications/?ordering=type&descending=false

Instability in ventricular repolarization in the presence of premature activations (PA) plays an important role in ... Atrial Premature Complexes / diagnosis*, etiology, physiopathology. Computer Simulation. Electrocardiography*. Female. Heart ... Previous Document: A Randomized Placebo-Controlled Study of Vernakalant (Oral) for the Prevention of Atrial Fibrillatio.... ... BACKGROUND: Instability in ventricular repolarization in the presence of premature activations (PA) plays an important role in ...

http://www.biomedsearch.com/nih/Unstable-QT-Interval-Dynamics-Precedes/21841208.html

a change in the frequency of premature atrial and ventricular complexes. *a change in serum total cholesterol level ...

https://clinicaltrials.gov/ct2/results?cond=%22Sleep+Deprivation%22&show_down=Y

Pattern, Atrial premature complex (beat), Base pattern , ECG, Heart , CVS. MDC_ECG_BEAT_ATR_P_C. APC. Atrial premature ... Aberrated atrial premature beat (Ashman beat: atrial premature beat with abnormal QRS morphology). 10. 8304. ... Junctional (nodal) premature contraction. 10. 8288. Pattern, Aberrated atrial premature beat (Ashman), Base pattern , ECG, ... Supraventricular premature contraction (atrial or nodal premature beat with normal QRS morphology). 10. 8256. ...

http://standards.ieee.org/downloads/11073/11073-10102-2012/ECG_BEAT_tableOutput.8g.html

atrial premature complexes (3) Filters. * Has Multimedia (1) Specify Date Range. From:. To:. Apply. ...

https://iovs.arvojournals.org/solr/searchresults.aspx?author=Wei+Wang

Atrial Causes, Patient Concerns and Latest Treatments and Congescor Reports and Side Effects. ... Atrial. Fibrillation in Esophageal Holter Electrocardiography Conditions: Atrial. Fibrillation; Atrial. Premature Complexes. ... Atrial. /Left Atrial. Appendage in Subjects With Nonvalvular Atrial. Fibrillation or Atrial. Flutter Condition: Atrial. ... Atrial. Flutter Ablation Condition: Atrial. Flutter. Interventions: Device: Atrial. flutter irrigated catheter; Device: Atrial ...

http://patientsville.com/i.htm?q=atrial&mp=Congescor

left atrium/atrial. MAP. monophasic action potential. PAC. premature atrial complex. PV. pulmonary vein. ... For each premature atrial complex (PAC), stimulus artifact (Stim) and phases 1, 2, and 3 of the AP are labeled. Activation time ... Objectives The authors sought to study mechanisms to explain why single premature atrial complexes (PACs) from the pulmonary ... Paroxysmal AF typically requires premature atrial complexes (PACs) (1) or sustaining mechanisms (2) from pulmonary veins (PVs) ...

http://www.onlinejacc.org/content/52/15/1222?ijkey=c320f1caf59a825462c482a52e405496eb450c67&keytype2=tf_ipsecsha

However, in recent years, doctors have learned that PACs may be important in people who have episodes of atrial fibrillation . (verywell.com)
In some people with atrial fibrillation, PACs are thought to trigger episodes of this arrhythmia. (verywell.com)
For this reason, some of the ablation procedures that are used to treat atrial fibrillation are aimed at eliminating PACs. (verywell.com)
Read about treating atrial fibrillation. (verywell.com)
Unless a person's PACs are thought to be triggering episodes of atrial fibrillation, it is almost never 'necessary' to treat them. (verywell.com)
Ablating PACs is virtually always reserved for those patients in whom the PACs are triggering more serious arrhythmias, such as atrial fibrillation. (verywell.com)
Characteristics of Ectopic Triggers Associated with Paroxysmal and Persistent Atrial Fibrillation: Evidence for a Changing Role. (verywell.com)
Frequent Premature Atrial Complexes Predict New Occurrence of Atrial Fibrillation and Adverse Cardiovascular Events. (verywell.com)
Premature atrial complexes (PACs) meet increased attention as a potential intermediary between sinus rhythm and atrial fibrillation (AF). (medworm.com)
Searching for Atrial Fibrillation Poststroke: A White Paper of the AF-SCREEN International Collaboration. (medworm.com)
Low Consultation Rate of General Population with Atrial Fibrillation. (medworm.com)
Rarely, in patients with other underlying structural heart problems, PACs can trigger a more serious arrhythmia such as atrial flutter or atrial fibrillation . (wikipedia.org)
Purpose: The clinical significance of post-procedural atrial premature beats immediately after catheter ablation for atrial fibrillation (AF) has not been clearly determined. (elsevier.com)
[3] Supraventricular tachycardias include atrial fibrillation , atrial flutter , and paroxysmal supraventricular tachycardia . (readtiger.com)
[4] In Europe and North America, as of 2014, atrial fibrillation affects about 2% to 3% of the population. (readtiger.com)
[8] Atrial fibrillation and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. (readtiger.com)

Premature atrial complexes, or PACs, are "extra" heartbeats that arise within the atria of the heart. (verywell.com)
PACs are early (that is, premature) electrical impulses that are generated within the cardiac atria, but not from the sinus node. (verywell.com)
Premature atrial contractions ( PACs ), also known as atrial premature complexes ( APC ) or atrial premature beats ( APB ), are a common cardiac dysrhythmia characterized by premature heartbeats originating in the atria . (wikipedia.org)
While the sinoatrial node typically regulates the heartbeat during normal sinus rhythm , PACs occur when another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat. (wikipedia.org)
Often, hypertension goes hand in hand with various atrial fibrillations including premature atrial contractions (PACs). (wikipedia.org)

p-Potassium was inversely associated with frequency of premature ventricular complexes (PVCs) especially in combination with diuretic treatment (r = -0.22, P = 0.015). (arctichealth.org)

Premature atrial contractions are often benign, requiring no treatment. (wikipedia.org)

We hypothesized that the provocation of immediate recurrence of atrial premature beats (IRAPB) and additional ablation improves the clinical outcome of AF ablation. (elsevier.com)
Post-procedure IRAPB was defined as frequent atrial premature beats (≥6/min) under isoproterenol infusion (5 μg/min), monitored for 10 min after internal cardioversion, and we ablated mappable IRAPBs. (elsevier.com)
[3] Extra beats include premature atrial contractions , premature ventricular contractions , and premature junctional contractions . (readtiger.com)

Premature atrial contractions are typically diagnosed with an electrocardiogram , Holter monitor , or cardiac event monitor . (wikipedia.org)
Typically, the atrial impulse propagates normally through the atrioventricular node and into the cardiac ventricles , resulting in a normal, narrow QRS complex . (wikipedia.org)

A supraventricular extrasystole ( SVES ) is an extrasystole or premature electrical impulse in the heart , generated above the level of the ventricle . (wikipedia.org)

However, if the atrial beat is premature enough, it may reach the atrioventricular node during its refractory period, in which case it will not be conducted to the ventricle and there will be no QRS complex following the P wave. (wikipedia.org)
This can be either a premature atrial contraction or a premature impulse from the atrioventricular node . (wikipedia.org)

Premature Atrial Contractions in the General Population: Frequency and Risk Factors. (verywell.com)

Since the premature beat initiates outside the sinoatrial node , the associated P wave appears different from those seen in normal sinus rhythm . (wikipedia.org)

In otherwise healthy patients, occasional premature atrial contractions are a common and normal finding and do not indicate any particular health risk. (wikipedia.org)

SVES should be viewed in contrast to a premature ventricular contraction which has a ventricular origin and the associated QRS change. (wikipedia.org)

Multivariable logistic regression assessed the association between baseline variables (Holter-detected atrial premature beats [APBs], runs of atrial tachycardia, age, and left atrial enlargement) and subsequent AF detection. (nih.gov)
Supraventricular arrhythmias, for instance, start in the upper chambers of the heart (the atria) and include atrial fibrillation (A-fib), Atrial Flutter, supraventricular tachycardia (SVT), and Wolff-Parkinson-White (WPW) syndrome. (mountsinai.org)
9. Electrophysiological ablation for atrial tachycardia within 6 months of the operation. (bioportfolio.com)
Whats the difference between Atrial Tachycardia and wondering atrial pacemaker? (brainscape.com)
Atrial Tachycardia is three or more PAC in a row, and PACs are a different type of P wave, but maybe we can say that all the P waves of the Atrial Tachycardia are to look the same, but by wondering Atrial pacemaker, it is just confused, wondering, should I be this type of P wave or should I be that type of P wave. (brainscape.com)
So it will have each of its P waves looki g different, but Atrial Tachycardia, it is fast and repeared PACs. (brainscape.com)
Only way to differnetiate this from atrial tachycardia is to know the history, that it was sudden onset, but other than that, they look the same. (brainscape.com)
The other rare E.C.G. changes include deformity of QRS complexes, prolongation of PR interval, atrial premature beats, and atrial tachycardia. (wikipedia.org)
The presence of a paced rhythm exactly at the upper rate limit with atrial sensing and exact A-V association warrants evaluation for pacemaker-mediated tachycardia (PMT). (medscape.com)
Frumin H, Furman S. Endless loop tachycardia started by an atrial premature complex in a patient with a dual chamber pacemaker. (medscape.com)
Tracking of atrial flutter during DDD pacing: another form of pacemaker-mediated tachycardia. (medscape.com)
Klementowicz PT, Furman S. Selective atrial sensing in dual chamber pacemakers eliminates endless loop tachycardia. (medscape.com)
Validation of device algorithm to differentiate pacemaker-mediated tachycardia from tachycardia due to atrial tracking. (medscape.com)
Telemetered ECG tracing with surface lead II (top) and intracardiac electrograms (atrial electrogram [center] and ventricular electrogram [lower]) and marker channel (bottom) showing pacemaker-mediated tachycardia (PMT). (medscape.com)
This is a typical example of PMT with ventricular pacing at maximum tracking rate (VP-MT) and then termination of the tachycardia as the atrial sensing (AS) is in the PVARP. (medscape.com)
It is also possible you experienced an arrhythmia, such as atrial fibrillation, atrial flutter, atrial tachycardia, or AV nodal reentrant tachycardia. (zocdoc.com)
We learn, for example, that during one electrocardiogram Sparks "had a rare premature atrial complex episode of supraventricular tachycardia, occasional to frequent multiform ventricular complexes and non-specific ST segment changes. (justia.com)
Ablation of cardiac arrhythmias without fluoroscopy has been described and shown to be safe in the ablation of supraventricular tachycardia, typical atrial flutter and atrial fibrillation (AFib). (acc.org)
Dr. Atiga's expertise is the diagnosis and treatment of all types of cardiac arrhythmias, including atrial fibrillation, supraventricular tachycardia (SVT), ventricular tachycardia, premature ventricular complexes (PVCs), and bradycardia. (medstarhealth.org)
Polymorphic ventricular tachycardia (PVT) is a form of ventricular tachycardia in which there are multiple ventricular foci with the resultant QRS complexes varying in amplitude, axis and duration. (lifeinthefastlane.com)

Read about treating atrial fibrillation. (verywell.com)

Premature Atrial Contractions in the General Population: Frequency and Risk Factors. (verywell.com)
Premature contractions ("ectopics") are classified by their origin - atrial ( PAC ), junctional ( PJC ) or ventricular ( PVC ). (litfl.com)
Persons with premature beats might perceive this as palpitations, because of the stronger ventricular contractions caused by the increased filling. (ecgwaves.com)
A type of cardiac arrhythmia with premature contractions of the HEART VENTRICLES. (bioportfolio.com)
Premature atrial contractions are typically diagnosed with an electrocardiogram , Holter monitor , or cardiac event monitor . (wikipedia.org)
Premature atrial contractions are often benign, requiring no treatment. (wikipedia.org)
In otherwise healthy patients, occasional premature atrial contractions are a common and normal finding and do not indicate any particular health risk. (wikipedia.org)
Interval between two paced atrial contractions. (pacemakerclub.com)
On the surface ECG, premature junctional contractions will appear as a normally shaped ventricular complex or QRS complex, not preceded by any atrial complex or P wave or preceded by an abnormal P wave with a shorter PR interval. (wikipedia.org)
A type of cardiac arrhythmia with premature atrial contractions or beats caused by signals originating from ectopic atrial sites. (icd9data.com)
if these reach threshold amplitude they may manifest as premature ventricular contractions (PVCs). (lifeinthefastlane.com)
It is associated with irregular and premature contractions, which can either originate in portions of the atria, or upper chambers of the heart, or ventricles, the lower chambers of the heart. (reference.com)

Many people occasionally experiencepremature atrial complexes, a common type of heart arrhythmia. (newhealthadvisor.org)
Atrial Fibrillation, also called AFib, is the most common form of arrhythmia and occurs more frequently as we age. (mountsinai.org)
If you have Afib (Atrial Fibrillation) or any type of cardiac arrhythmia and need life insurance, some arrhythmia can be harmless and have very little impact on your life insurance rate. (americanterm.com)
Related terms are supraventricular arrhythmia, paroxysmal atrial fibrillation and paroxysmal atrial flutter. (americanterm.com)
Atrial fibrillation (AF) is the most common type of arrhythmia. (patientsville.com)
In this paper, an index for evaluating Distance of a healthy heart from Sino-Atrial Blocking Arrhythmia (SABA) is presented. (scirp.org)
After definition of the main pacemakers' model of heart, Sino-Atrial (SA) and Atrio-Ventricular nodes (AV), the boundary of synchronization, which demonstrates the boundary of blocking arrhythmia, is obtained using perturbation method. (scirp.org)
Gholizade-Narm, H. , Khademi, M. , Azemi, A. and Karimi-Ghartemani, M. (2010) An index for evaluating distance of a healthy heart from Sino-Atrial blocking arrhythmia. (scirp.org)
Perhaps the commonest arrhythmia causing a patient to visit the family doctor is the symptomatic premature ventricular beat/complex (ventricular ectopic). (mhmedical.com)
Atrial fibrillation (AF) is the most common arrhythmia, with a prevalence rising from 0.7% in the age group 55-59 years to 17.8% in those aged ≥85 years. (biomedsearch.com)
Atrial fibrillation (AF) is the most common arrhythmia, increasing in prevalence with age. (ahajournals.org)
Atrial fibrillation is an arrhythmia, characterized by grossly disorganized atrial electrical activity, which is irregular in respect to both rate and rhythm (see figures 14 , 15a, 15b ). (rjmatthewsmd.com)
Repeated episodes of this arrhythmia can result in a marked shortening of the atrial refractory period and a loss of the normal lengthening of atrial refractiveness at slower heart rates. (rjmatthewsmd.com)
A critical mass of atrial tissue is required to sustain the minimal number of simultaneous circuits necessary for the perpetuation of the arrhythmia. (rjmatthewsmd.com)

Electrocardiography revealed left atrial enlargement, isolated frequent ventricular premature complexes, right axis deviation, left ventricular hypertrophy and diffuse T wave abnormalities. (pulsus.com)
Electrocardiography may demonstrate atrial arrhythmias (atrial premature complexes, atrial fibrillation), especially in severely affected animals with left atrial dilatation. (merckvetmanual.com)

In most cases, premature atrial complexes are not serious, but they may be significant if associated with atrial fibrillation. (newhealthadvisor.org)
OSA has mainly been associated with premature atrial complex short runs, sinus bradycardia, sinus pauses, premature ventricular complexes and paroxysmal atrial fibrillation [ 9 - 11 ], while central sleep apnoea (CSA) has mainly been associated with atrial fibrillation [ 12 ]. (ersjournals.com)
Chen C-Y, Ho C-H, Chen C-L, Yu C-C. Nocturnal desaturation is associated with atrial fibrillation in patients with ischemic stroke and obstructive sleep apnea. (springermedizin.de)

Irritation of the atrial myocardium causes premature depolarization of a region of the atria which spreads across the atria to the AV node. (vetstream.com)
Because the impulse originates in the atria it will pass through the bundle of His and thereby produce a normal QRS complex (provided that intraventricular conduction is normal). (ecgwaves.com)
A premature atrial contraction occurs when an ectopic focus in the atria discharges before the next sinus impulse. (ecgwaves.com)
The premature impulse may depolarize the atria and subsequently the ventricles, provided that the myocardium and conduction system have repolarized. (ecgwaves.com)
A. APC, or atrial premature complex (or beat) is a beat that arise in the atria of the heart from outside the normal mechanism of heartbeats. (thefreedictionary.com)
atrial complex the P wave of the electrocardiogram , representing electrical activity of the atria. (thefreedictionary.com)

Occult paroxysmal atrial fibrillation (PAF) is considered a potential etiology. (semanticscholar.org)
Giant left atrial myxoma presenting with pulmonary hypertension can be an etiology of heart failure among Black Africans. (pulsus.com)

Characteristics of Ectopic Triggers Associated with Paroxysmal and Persistent Atrial Fibrillation: Evidence for a Changing Role. (verywell.com)
Episodes of atrial fibrillation may come and go (called paroxysmal atrial fibrillation) or they may continue for longer periods of time (persistent atrial fibrillation). (mountsinai.org)
when an episode lasts more than 7 days, we call the condition persistent atrial fibrillation. (mountsinai.org)
A 50 year old male with history of persistent atrial fibrillation and three failed electrical cardioversion attempts in the past 2 years was being evaluated for a pulmonary vein isolation (PVI) procedure. (scmr.org)

The abnormal P wave is followed by a QRS complex. (newhealthadvisor.org)
It is characterized by the premature QRS complex on ECG that is of abnormal shape and great duration (generally >129 msec). (bioportfolio.com)
Abnormal or ectopic impulses are described based on their site of origin (atrial, junctional, supraventricular, ventricular). (vin.com)
Abnormal premature impulses (complexes) may occur singly or in multiples. (vin.com)
Echocardiography demonstrates malformation of the mitral valve complex (fused chordae tendineae and thickened, immobile valve leaflets, abnormal appearance to the papillary muscles) and left atrial and ventricular dilatation. (merckvetmanual.com)

QRS complex a group of waves seen on an electrocardiogram , representing ventricular depolarization. (thefreedictionary.com)
A novel device for detection of (asymptomatic) atrial fibrillation is presented and clinically validated for performance compared with the 12-lead electrocardiogram (ECG, Gold standard). (biomedsearch.com)
Atrial premature complexes (APCs) can be seen on an electrocardiogram (EKG) as a premature wave called a P wave. (petmd.com)
These foci may mimic the appearance of atrial fibrillation on the surface electrocardiogram or, more commonly, may degenerate or trigger classic atrial fibrillation. (rjmatthewsmd.com)

Depolarization of the ventricles results in the largest part of the ECG signal, known as the QRS complex.Repolarization of the heart muscle (myocardium) is represented by the ST segment, an isoelectric line, and the T wave, which is seen as an upright deflection. (newhealthadvisor.org)
In most cases the premature atrial impulse is conducted to the ventricles, which results in ventricular depolarization and the appearance of a QRS complex . (ecgwaves.com)

Outpatient cardiac telemetry detects a high rate of atrial fibrillation in cryptogenic stroke. (semanticscholar.org)
Duration of paroxysmal atrial fibrillation in cryptogenic stroke is not associated with stroke severity and early outcomes. (semanticscholar.org)

Pucelikova T , Kautznerova D, Vedlich D, Tintera J, Kautzner J . A complex anomaly of systemic and pulmonary venous return associated with sinus venosus atrial septal defect. (ikem.cz)
An oblique peri-axial image perpendicular to the long-axis of the pLSVC at the level of left pulmonary veins was acquired which demonstrated the pLSVC coursing between the left atrial appendage and the left superior pulmonary vein completely adjacent to the walls of these structure (Movie 3). (scmr.org)
There was no communication between the pLSVC and the pulmonary veins or left atrial appendage. (scmr.org)
Since the pLSVC was adjacent to the left atrial wall and the left superior pulmonary vein, the electrical activity within the pLSVC was able to conduct into these structures thereby potentially initiating atrial fibrillation. (scmr.org)

Take the E away from pacemaker and you have PAC maker, so it is a wondering, like by everywhere, atrial, having to do with the atrium, PAC-maker, that each P is strange. (brainscape.com)
Frohlig G, Schwerdt H, Schieffer H, Bette L. Atrial signal variations and pacemaker malsensing during exercise: a study in the time and frequency domain. (medscape.com)
Generation of aberrant impulses in ectopic areas of heart outside of normal cardiac pacemaker cells results in premature contraction. (reference.com)

Atrial Fibrillation and Premature Atrial Complexes in Patients With Ischemic Stroke. (strokecenter.org)
Prediction of new-onset atrial fibrillation after first-ever ischemic stroke: A comparison of CHADS2, CHA2DS2-VASc and HATCH scores and the added value of stroke severity. (semanticscholar.org)
Premature atrial complexes in an ischemic stroke population and risk of recurrent stroke: a systematic review. (semanticscholar.org)

interpolated premature ventricular complex a premature ventricular complex that does not interfere with the conduction of the next sinus beat, i.e., it lacks the usual following compensatory pause. (thefreedictionary.com)
P-Q interval - Time from onset of atrial muscle activation, through conduction over the A-V node, His bundle and purkinje fibers. (vin.com)

SVES should be viewed in contrast to a premature ventricular contraction which has a ventricular origin and the associated QRS change. (wikipedia.org)

It is crucial to the perpetuation of atrial fibrillation that each atrium gets a constant supply of 'new' impulses from the other atrium. (rjmatthewsmd.com)

In the differential diagnosis of PMT, sinus and tracked atrial tachyarrhythmias must be considered. (medscape.com)

Identification of their presence along with demonstration of electrical activity within such structures is key to successful ablation of atrial fibrillation 5 . (scmr.org)

We also compared the changes in the left atrial volumes and left atrial volume index (LAVI) after PVC ablation. (elsevier.com)

Risk of new-onset atrial fibrillation and stroke after radiofrequency ablation of isolated, typical atrial flutter. (springermedizin.de)

Occult atrial fibrillation (AF) can be the underlying cause for cryptogenic stroke (CS). (onmedica.com)

Our aim was to investigate the association between post-procedural burden of supraventricular ectopic complexes (SVEC) and the risk of long-term atrial fibrillation (AF) recurrence. (diva-portal.org)

Atrial disease , eg congenital cardiac defects Congenital heart disease: overview , neoplasia Pericardium: neoplasia - heartbase tumor , cardiomyopathy, AV valve disease in older cats. (vetstream.com)
Congenital malformation of the mitral valve complex (mitral valve dysplasia) is a common congenital cardiac defect in cats. (merckvetmanual.com)
Excluding animals born with a congenital heart disease, atrial premature complexes often affect older dogs, especially small-breed dogs. (petmd.com)

Since the premature beat initiates outside the sinoatrial node , the associated P wave appears different from those seen in normal sinus rhythm . (wikipedia.org)
Sinus rhythm with premature atrial complexes. (mhmedical.com)
This phenomenon called atrial remodelling may be reversible with maintenance of sinus rhythm. (rjmatthewsmd.com)
Sinus rhythm, or possibly ectopic atrial rhythm (biphasic / inverted P waves in lead II). (lifeinthefastlane.com)

Left untreated, Atrial Fibrillation is a leading cause of stroke and can weaken the heart and cause heart failure. (mountsinai.org)
Biomarkers of Atrial Cardiopathy and Atrial Fibrillation Detection on Mobile Outpatient Continuous Telemetry After Embolic Stroke of Undetermined Source. (semanticscholar.org)
BACKGROUND: Atrial fibrillation (AF) is highly prevalent, occurring in 1%-2% of the adult population, increasing the risk of stroke, and resulting in considerable healthcare costs. (bvsalud.org)

Atrial Ectopics 5. (healthcaremagic.com)

Many people with atrial flutter develop atrial fibrillation over time. (mountsinai.org)

Under normal circumstances, the heart works with exceptional synchronization between the various atrial and ventricular structures, resulting in a consistent rhythmic pattern. (petmd.com)

The vein of Marshall and pLSVC which drains into the coronary sinus as well as the ligament of Marshall have all been implicated in the cause for premature atrial complexes and initiation of atrial fibrillation 3,4 . (scmr.org)
OBJECTIVES: We investigated the electrophysiologic characteristics in the initiation of paroxysmal atrial fibrillation (PAF) from a focal area. (elsevier.com)
Chen, S A. / Electrophysiologic characteristics in initiation of paroxysmal atrial fibrillation from a focal area . (elsevier.com)

A premature atrial contraction will most likely also depolarize the sinoatrial node and reset its clock. (ecgwaves.com)

Anatomy5

Organisms2

Diseases20

Chemicals and Drugs5

Analytical, Diagnostic and Therapeutic Techniques and Equipment11

Psychiatry and Psychology6

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Exercise-induced uncommon atrioventricular nodal reentrant tachycardia with sick sinus syndrome: a case report. (1/58)

Initiation of atrial fibrillation by ectopic beats originating from the pulmonary veins: electrophysiological characteristics, pharmacological responses, and effects of radiofrequency ablation. (2/58)

Altered complexity and correlation properties of R-R interval dynamics before the spontaneous onset of paroxysmal atrial fibrillation. (3/58)

Cardiac arrhythmias and stroke: increased risk in men with high frequency of atrial ectopic beats. (4/58)

Evaluation of post-repolarization refractoriness for conduction block in cardiac muscle: studies in an artificial isthmus in the canine right atrium. (5/58)

The class III antiarrhythmic drugs dofetilide and sotalol prevent AF induction by atrial premature complexes at doses that fail to terminate AF. (6/58)

Giant negative T waves during interferon therapy in a patient with chronic hepatitis C. (7/58)

Chronic atrial fibrillation in patients with rheumatic heart disease: mapping and radiofrequency ablation of flutter circuits seen at initiation after cardioversion. (8/58)

Atrial Premature Complexes

Ventricular Premature Complexes

Moricizine

Electrocardiography, Ambulatory

Arrhythmias, Cardiac

Hypokalemia

Tachycardia, Supraventricular

Cardiac Complexes, Premature

Radiology Information Systems

Stroke

Atrial Fibrillation

Anticoagulants

Warfarin

International Normalized Ratio

Brain Ischemia

Long QT Syndrome

Electrocardiography

Catheter Ablation

Encyclopedias as Topic

Sinoatrial Node

Heart Atria

Personnel Staffing and Scheduling Information Systems

Heart Rate

New York City

New York

Heart

Ballota

Pulmonary Veins

Tachycardia, Paroxysmal

Angioplasty, Balloon

Angioplasty, Balloon, Coronary

Coronary Artery Disease

Angioplasty

Coronary Angiography

Coronary Disease

Coronary Vessels

Tachycardia, Ventricular

Myocardial Infarction

Fractals

Tachycardia

Disorders of Excessive Somnolence

Narcolepsy

Sleep

Polysomnography

Automobile Driving

Reaction Time

Wakefulness

Gold Colloid

Ankyrins

Yang Deficiency

Mastodynia

Periodicals as Topic

Pinellia

Journal Impact Factor

Exercise-induced uncommon atrioventricular nodal reentrant tachycardia with sick sinus syndrome: a case report. (1/58)

Initiation of atrial fibrillation by ectopic beats originating from the pulmonary veins: electrophysiological characteristics, pharmacological responses, and effects of radiofrequency ablation. (2/58)

Altered complexity and correlation properties of R-R interval dynamics before the spontaneous onset of paroxysmal atrial fibrillation. (3/58)

Cardiac arrhythmias and stroke: increased risk in men with high frequency of atrial ectopic beats. (4/58)

Evaluation of post-repolarization refractoriness for conduction block in cardiac muscle: studies in an artificial isthmus in the canine right atrium. (5/58)

The class III antiarrhythmic drugs dofetilide and sotalol prevent AF induction by atrial premature complexes at doses that fail to terminate AF. (6/58)

Giant negative T waves during interferon therapy in a patient with chronic hepatitis C. (7/58)

Chronic atrial fibrillation in patients with rheumatic heart disease: mapping and radiofrequency ablation of flutter circuits seen at initiation after cardioversion. (8/58)

Clinical significance of additional ablation of atrial premature beats after catheter ablation for atrial fibrillation<...

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