Electrophysiologic Techniques, Cardiac
Tachycardia, Atrioventricular Nodal Reentry
Tachycardia, Ectopic Atrial
Body Surface Potential Mapping
Heart Conduction System
Ventricular Premature Complexes
Accessory Atrioventricular Bundle
Tachycardia, Sinoatrial Nodal Reentry
Cardiac Pacing, Artificial
Bundle of His
Catheterization, Central Venous
Tachycardia, Ectopic Junctional
Pulmonary Veno-Occlusive Disease
Central Venous Catheters
Atrial Premature Complexes
Cardiac Complexes, Premature
Vena Cava, Superior
Cardiac Imaging Techniques
Vena Cava, Inferior
Predictive Value of Tests
High-Intensity Focused Ultrasound Ablation
Tomography, X-Ray Computed
Arrhythmogenic Right Ventricular Dysplasia
Ventricular Outflow Obstruction
Frequency and long term follow up of valvar insufficiency caused by retrograde aortic radiofrequency catheter ablation procedures. (1/3420)OBJECTIVE: To assess the frequency of valvar complications caused by left sided radiofrequency catheter ablation using the retrograde aortic technique. METHODS: 179 patients (118 male) with a mean (SD) age of 43 (17) years underwent 216 procedures at one centre. The target of the ablation was an accessory atrioventricular pathway in 144 patients, the atrioventricular junction in 29 patients, and a ventricular tachycardia in six patients. In 25 patients structural heart disease was identified before the procedure (ischaemic heart disease 10, cardiomyopathy nine, valvar three, other three). Echo/Doppler examinations were performed the day before the procedure and within 24 hours postablation; the investigations were all reviewed by the same investigator. Patients with identified valvar injury caused by the procedure were followed for 42 (7) months. RESULTS: Valvar injury caused by the ablation procedure was identified in four young (age 30 (8) years), otherwise healthy patients with left lateral atrioventricular accessory pathways. Mild mitral insufficiency with a central regurgitation jet was detected in two patients and remained unchanged at follow up. Mild aortic insufficiency was detected in another two patients. In one of these the regurgitation jet was central and remained unchanged at follow up. In one patient the regurgitation jet was located between the non-coronary and left cusps in relation to a loosely attached structure. Both the structure and the valvar regurgitation disappeared during follow up. No clinical complications occurred in any of the patients during follow up. CONCLUSION: In this study, the frequency of valvar complications after left sided radiofrequency catheter ablation using the retrograde aortic technique was 1.9%. (+info)
AV reentrant and idiopathic ventricular double tachycardias: complicated interactions between two tachycardias. (2/3420)An electrophysiological study was performed in a 61 year old man with Wolff- Parkinson-White (WPW) syndrome. At baseline, neither ventricular nor supraventricular tachycardias could be induced. During isoprenaline infusion, ventricular tachycardia originating from the right ventricular outflow tract (RVOT) with a cycle length of 280 ms was induced and subsequently atrioventricular reentrant tachycardia (AVRT) with a cycle length of 300 ms using an accessory pathway in the left free wall appeared. During these tachycardias, AVRT was entrained by ventricular tachycardia. The earliest ventricular activation site during the ventricular tachycardia was determined to be the RVOT site and a radiofrequency current at 30 W successfully ablated the ventricular tachycardia at this site. The left free wall accessory pathway was also successfully ablated during right ventricular pacing. The coexistence of WPW syndrome and cathecolamine sensitive ventricular tachycardia originating from the RVOT has rarely been reported. Furthermore, the tachycardias were triggered by previous tachycardias. (+info)
Tachycardia induced tachycardia: case report of right ventricular outflow tract tachycardia and AV nodal reentrant tachycardia. (3/3420)Tachycardia induced tachycardia, or so called double tachycardia, is rare. A 34 year old woman is described who had a history of syncope, frequent extrasystoles, and episodes of non-sustained ventricular tachycardia, perceived as palpitation, without syncope. At electrophysiological study, during infusion of isoprenaline, an episode of non-sustained ventricular tachycardia arising from the right ventricular outflow tract initiated sustained atrioventricular nodal reentrant tachycardia, thought to be the cause of the patient's syncope. Ablation of the right ventricular outflow tract focus abolished the ventricular ectopy; the slow AV nodal pathway was also ablated. The patient no longer has either syncope or palpitation. (+info)
Clinical application of an integrated 3-phase mapping technique for localization of the site of origin of idiopathic ventricular tachycardia. (4/3420)BACKGROUND: Radiofrequency (RF) catheter ablation provides curative treatment for idiopathic ventricular tachycardia (VT). METHODS AND RESULTS: Nineteen consecutive patients with an idiopathic VT underwent RF catheter ablation. An integrated 3-phase mapping approach was used, consisting of the successive application of online 62-lead body surface QRS integral mapping, directed regional paced body surface QRS integral mapping, and local activation sequence mapping. Mapping phase 1 was localization of the segment of VT origin by comparing the VT QRS integral map with a database of mean paced QRS integral maps. Mapping phase 2 was body surface pace mapping during sinus rhythm in the segment localized in phase 1 until the site at which the paced QRS integral map matched the VT QRS integral map was identified (ie, VT exit site). Mapping phase 3 was local activation sequence mapping at the circumscribed area identified in phase 2 to identify the site with the earliest local endocardial activation (ie, site of VT origin). This site became the ablation target. Ten VTs were ablated in the right ventricular outflow tract, 2 at the basal LV septum, and 7 at the midapical posterior left ventricle. A high long-term ablation success (mean follow-up duration, 14+/-9 months) was achieved in 17 of the 19 patients (89%) with a low number of RF pulses (mean, 3.3+/-2.2 pulses per patient). CONCLUSIONS: This prospective study shows that integrated 3-phase mapping for localization of the site of origin of idiopathic VT offers efficient and accurate localization of the target site for RF catheter ablation. (+info)
LocaLisa: new technique for real-time 3-dimensional localization of regular intracardiac electrodes. (5/3420)BACKGROUND: Estimation of the 3-dimensional (3D) position of ablation electrodes from fluoroscopic images is inadequate if a systematic lesion pattern is required in the treatment of complex arrhythmogenic substrates. METHODS AND RESULTS: We developed a new technique for online 3D localization of intracardiac electrodes. Regular catheter electrodes are used as sensors for a high-frequency transthoracic electrical field, which is applied via standard skin electrodes. We investigated localization accuracy within the right atrium, right ventricle, and left ventricle by comparing measured and true interelectrode distances of a decapolar catheter. Long-term stability was analyzed by localization of the most proximal His bundle before and after slow pathway ablation. Electrogram recordings were unaffected by the applied electrical field. Localization data from 3 catheter positions, widely distributed within the right atrium, right ventricle, or left ventricle, were analyzed in 10 patients per group. The relationship between measured and true electrode positions was highly linear, with an average correlation coefficient of 0.996, 0.997, and 0.999 for the right atrium, right ventricle, and left ventricle, respectively. Localization accuracy was better than 2 mm, with an additional scaling error of 8% to 14%. After 2 hours, localization of the proximal His bundle was reproducible within 1.4+/-1.1 mm. CONCLUSIONS: This new technique enables accurate and reproducible real-time localization of electrode positions in cardiac mapping and ablation procedures. Its application does not distort the quality of electrograms and can be applied to any electrode catheter. (+info)
Atrioventricular nodal ablation and implantation of mode switching dual chamber pacemakers: effective treatment for drug refractory paroxysmal atrial fibrillation. (6/3420)OBJECTIVE: To assess the effect of atrioventricular node ablation and implantation of a dual chamber, mode switching pacemaker on quality of life, exercise capacity, and left ventricular systolic function in patients with drug refractory paroxysmal atrial fibrillation. PATIENTS: 18 consecutive patients with drug refractory paroxysmal atrial fibrillation. METHODS: Quality of life was assessed before and after the procedure using the psychological general wellbeing index (PGWB), the McMaster health index (MHI), and a visual analogue scale for cardiac symptoms. Nine of the patients also underwent symptom limited exercise tests and echocardiography to assess left ventricular systolic function. RESULTS: The procedure allowed a reduction in antiarrhythmic drug treatment (p < 0.01). PGWB and symptom scores improved (p < 0.01) but the MHI score did not change. Left ventricular systolic function and exercise capacity were unchanged. CONCLUSIONS: Atrioventricular node ablation and implantation of a DDDR/MS pacemaker is effective treatment for refractory paroxysmal atrial fibrillation, producing improved quality of life while allowing a reduction in drug burden. The popularity of the treatment is justified, but further studies are needed to determine optimum timing of intervention. (+info)
Predictors of atrial rhythm after atrioventricular node ablation for the treatment of paroxysmal atrial arrhythmias. (7/3420)OBJECTIVE: To assess the natural history of the atrial rhythm of patients with paroxysmal atrial arrhythmias undergoing atrioventricular node ablation and permanent pacemaker implantation. DESIGN AND SETTING: A retrospective cohort study of consecutive patients identified from the pacemaker database and electrophysiology records of a tertiary referral hospital. PATIENTS: 62 consecutive patients with paroxysmal atrial arrhythmias undergoing atrioventricular node ablation and permanent pacemaker implantation between 1988 and July 1996. MAIN OUTCOME MEASURES: (1) Atrial rhythm on final follow up ECG, classified as either ordered (sinus rhythm or atrial pacing) or disordered (atrial fibrillation, atrial flutter or atrial tachycardia). (2) Chronic atrial fibrillation, defined as a disordered rhythm on two consecutive ECGs (or throughout a 24 hour Holter recording) with no ordered rhythm subsequently documented. RESULTS: Survival analysis showed that 75% of patients progressed to chronic atrial fibrillation by 2584 days (86 months). On multiple logistic regression analysis a history of electrical cardioversion, increasing patient age, and VVI pacing were associated with the development of chronic atrial fibrillation. A history of electrical cardioversion and increasing patient age were associated with a disordered atrial rhythm on the final follow up ECG. CONCLUSIONS: Patients with paroxysmal atrial arrhythmias are at high risk of developing chronic atrial fibrillation. A history of direct current cardioversion. (+info)
Recovery pattern of left ventricular dysfunction following radiofrequency ablation of incessant supraventricular tachycardia in infants and children. (8/3420)OBJECTIVE: To assess recovery pattern of left ventricular function secondary to incessant tachycardia after radiofrequency ablation in a group of infants and children. DESIGN AND SETTING: A combined prospective and retrospective echocardiographic study carried out in a tertiary paediatric cardiac centre. PATIENTS: Echocardiographic evaluation of left ventricular size and function in nine children with incessant tachycardia, before and after successful radiofrequency ablation. Age at ablation ranged from 2 months to 12.5 years (mean 4.1 years). Recovery of left ventricular function was analysed in relation to age at ablation (group I < 18 months, group II > 18 months). MAIN OUTCOME MEASURE: Ventricular recovery pattern. RESULTS: Seven of the nine children had left ventricular dysfunction; six of these also had left ventricular dilatation. All children with left ventricular dysfunction had normalisation of ejection fraction and fractional shortening; left ventricular dilatation also improved, but the improvement occurred after recovery of function. There was a shorter recovery time for left ventricular function in younger (group I) than in older children (group II) (mean (SD) 5.7 (7.2) months v 31.3 (5.2) (p < 0.002). CONCLUSIONS: Tachycardia induced cardiomyopathy is reversible following curative treatment with radiofrequency. Recovery of left ventricular systolic function precedes recovery of left ventricular dilatation. Time course to recovery is shorter in younger children. (+info)
Atrial fibrillation (AFib) is a type of arrhythmia, or abnormal heart rhythm, that occurs when the upper chambers of the heart (the atria) beat irregularly and rapidly, often out of sync with the lower chambers (the ventricles). This can cause the heart to pump inefficiently and can lead to blood clots, stroke, and other complications. AFib is a common condition, affecting an estimated 2.7 to 6.1 million people in the United States. It is more common in older adults and can be caused by a variety of factors, including high blood pressure, heart disease, and certain medical conditions. Treatment for AFib may include medications, lifestyle changes, and procedures to restore a normal heart rhythm.
Tachycardia, supraventricular refers to a type of rapid heartbeat that originates from an area above the ventricles in the heart. The ventricles are the lower chambers of the heart that pump blood out to the rest of the body. Supraventricular tachycardia (SVT) can be caused by a variety of factors, including stress, anxiety, caffeine, alcohol, certain medications, and underlying medical conditions such as heart disease, thyroid disorders, and electrolyte imbalances. SVT can present with symptoms such as palpitations, rapid or irregular heartbeat, shortness of breath, dizziness, and fainting. Treatment options for SVT may include medications to slow the heart rate, cardioversion (a procedure that uses electrical shocks to restore a normal heart rhythm), or catheter ablation (a procedure that uses heat or cold to destroy the abnormal heart tissue causing the SVT).
Wolff-Parkinson-White (WPW) syndrome is a heart condition characterized by an extra electrical pathway that bypasses the normal conduction system of the heart. This can cause the heart to beat too fast, leading to palpitations, dizziness, and fainting. WPW syndrome can be inherited or acquired, and it is more common in men than women. It is typically diagnosed with an electrocardiogram (ECG) and can be treated with medications or procedures to correct the abnormal electrical pathway. In some cases, WPW syndrome can lead to more serious heart problems, such as atrial fibrillation or ventricular fibrillation, and may require more aggressive treatment.
Tachycardia, Atrioventricular Nodal Reentry is a type of abnormal heart rhythm, also known as supraventricular tachycardia, that occurs when electrical signals in the heart become trapped in a loop within the atrioventricular (AV) node. This causes the heart to beat faster than normal, often at a rate of 100-200 beats per minute. The AV node is a specialized group of cells in the heart that acts as a bridge between the atria (upper chambers) and the ventricles (lower chambers). It is responsible for slowing down the electrical signals that travel from the atria to the ventricles, allowing the ventricles to contract in a coordinated manner. In tachycardia, Atrioventricular Nodal Reentry, the electrical signals become trapped in a loop within the AV node, causing them to continuously stimulate the heart to beat faster. This can lead to symptoms such as palpitations, dizziness, and shortness of breath. Treatment for tachycardia, Atrioventricular Nodal Reentry may include medications to slow down the heart rate or to convert the abnormal rhythm to a normal rhythm, or electrical cardioversion, a procedure in which an electrical shock is delivered to the heart to restore a normal rhythm. In some cases, catheter ablation may be necessary, a procedure in which a catheter is inserted into the heart to destroy the abnormal electrical pathways that are causing the tachycardia.
Tachycardia, ectopic atrial is a type of abnormal heart rhythm characterized by rapid and irregular heartbeats that originate from the atria (upper chambers) of the heart. In a normal heartbeat, the sinoatrial (SA) node, which is located in the right atrium, generates electrical impulses that stimulate the atria to contract and pump blood into the ventricles (lower chambers) of the heart. However, in tachycardia, ectopic atrial, the electrical impulses are generated by a different part of the atria, such as the pulmonary veins or the Bachmann's bundle, instead of the SA node. This leads to rapid and irregular heartbeats that can cause symptoms such as palpitations, dizziness, and shortness of breath. Tachycardia, ectopic atrial can be a serious condition and may require medical intervention to treat.
Atrial flutter is a type of abnormal heart rhythm that occurs in the atria, which are the upper chambers of the heart. It is characterized by rapid, uncoordinated electrical activity in the atria, which can cause the heart to beat too fast and irregularly. Atrial flutter can be caused by a variety of factors, including high blood pressure, heart disease, and certain medications. It can cause symptoms such as palpitations, shortness of breath, and dizziness, and can increase the risk of stroke and other complications. Treatment for atrial flutter typically involves medications to slow the heart rate and restore a normal rhythm, or in some cases, electrical cardioversion or catheter ablation to destroy the abnormal electrical pathways in the heart.
Tachycardia, ventricular refers to an abnormally fast heart rate that originates from the ventricles, which are the lower chambers of the heart. This type of tachycardia is also known as ventricular tachycardia (VT) and can be a serious medical condition that requires prompt medical attention. Ventricular tachycardia can be caused by a variety of factors, including heart disease, electrolyte imbalances, and certain medications. It can also be a complication of other medical conditions, such as heart attacks, heart failure, and myocarditis. The symptoms of ventricular tachycardia can vary depending on the severity and duration of the episode. Common symptoms include palpitations, shortness of breath, dizziness, and fainting. In some cases, ventricular tachycardia can lead to more serious complications, such as cardiac arrest, which can be life-threatening. Treatment for ventricular tachycardia typically involves medications to slow down the heart rate and restore a normal rhythm. In some cases, electrical cardioversion or catheter ablation may be necessary to eliminate the abnormal heart rhythm. It is important to seek medical attention immediately if you suspect you or someone else may be experiencing ventricular tachycardia.
Ventricular premature complexes (VPCs) are abnormal heartbeats that originate from the ventricles, which are the lower chambers of the heart. They are also known as ventricular extra beats or ventricular premature contractions (VPCs). VPCs are a common type of arrhythmia, which is an irregular heartbeat. VPCs can occur spontaneously or in response to certain triggers, such as stress, caffeine, or alcohol. They are usually harmless and do not cause any symptoms in most people. However, in some cases, VPCs can be a sign of an underlying heart condition, such as heart disease or heart failure. VPCs can be detected through an electrocardiogram (ECG), which is a test that records the electrical activity of the heart. Treatment for VPCs may not be necessary if they are not causing any symptoms or if they are a result of a temporary trigger. However, if VPCs are frequent or are causing symptoms, treatment may include medications or other interventions to help regulate the heartbeat.
In the medical field, recurrence refers to the reappearance of a disease or condition after it has been treated or has gone into remission. Recurrence can occur in various medical conditions, including cancer, infections, and autoimmune diseases. For example, in cancer, recurrence means that the cancer has come back after it has been treated with surgery, chemotherapy, radiation therapy, or other treatments. Recurrence can occur months, years, or even decades after the initial treatment. In infections, recurrence means that the infection has returned after it has been treated with antibiotics or other medications. Recurrence can occur due to incomplete treatment, antibiotic resistance, or other factors. In autoimmune diseases, recurrence means that the symptoms of the disease return after they have been controlled with medication. Recurrence can occur due to changes in the immune system or other factors. Overall, recurrence is a significant concern for patients and healthcare providers, as it can require additional treatment and can impact the patient's quality of life.
Tachycardia, paroxysmal refers to a type of rapid heartbeat that occurs suddenly and lasts for a short period of time. It is characterized by heart rates that are faster than 100 beats per minute, and it can be caused by a variety of factors, including stress, anxiety, exercise, or certain medications. Paroxysmal tachycardia is often associated with certain heart conditions, such as atrial fibrillation or Wolff-Parkinson-White syndrome. It can also be a symptom of other medical conditions, such as hyperthyroidism or anemia. Treatment for paroxysmal tachycardia depends on the underlying cause and the severity of the symptoms. In some cases, medications may be prescribed to slow down the heart rate or prevent future episodes. In more severe cases, procedures such as catheter ablation may be necessary to correct the underlying heart condition.
The accessory atrioventricular bundle, also known as the Bachmann bundle or interatrial bundle, is a bundle of specialized conducting cells located in the atrioventricular septum, the wall that separates the atria and ventricles in the heart. It is one of the three main pathways that conduct electrical impulses from the atria to the ventricles, along with the atrioventricular node and the bundle of His. The accessory atrioventricular bundle is a relatively small bundle of fibers that runs from the right atrium to the right ventricle, parallel to the larger bundle of His. It is thought to play a role in the normal conduction of electrical impulses through the heart, and may be important in certain heart conditions, such as atrial fibrillation. In some cases, the accessory atrioventricular bundle may be enlarged or abnormally positioned, which can lead to abnormal electrical conduction and potentially cause symptoms such as palpitations, dizziness, or fainting. In these cases, treatment may be necessary to correct the abnormality and restore normal heart function.
Tachycardia, sinoatrial nodal reentry (SNR) is a type of abnormal heart rhythm, or arrhythmia, that occurs when electrical signals in the heart become disrupted and cause the heart to beat too fast. It is caused by a malfunction in the sinoatrial node, which is the natural pacemaker of the heart. SNR is a type of reentrant arrhythmia, which means that electrical signals are looping around in a cycle within the heart, causing the heart to beat too fast. This can lead to symptoms such as palpitations, dizziness, and shortness of breath. Treatment for SNR may include medications, electrical cardioversion, or catheter ablation.
Tachycardia is a medical condition characterized by an abnormally fast heart rate, typically defined as a resting heart rate of 100 beats per minute or higher. The normal resting heart rate for adults is generally considered to be between 60 and 100 beats per minute. Tachycardia can be classified into several types based on the underlying cause, including: 1. Sinus tachycardia: This is the most common type of tachycardia, and it occurs when the heart rate is faster than normal but still within a normal range for the individual's age, fitness level, and other factors. 2. Atrial fibrillation: This is a type of arrhythmia characterized by irregular and rapid heartbeats that originate in the atria (upper chambers) of the heart. 3. Ventricular tachycardia: This is a type of arrhythmia characterized by rapid and irregular heartbeats that originate in the ventricles (lower chambers) of the heart. Tachycardia can be caused by a variety of factors, including stress, anxiety, caffeine or other stimulants, dehydration, electrolyte imbalances, certain medications, and underlying medical conditions such as heart disease, thyroid disorders, or lung disease. Treatment for tachycardia depends on the underlying cause and may include medications, lifestyle changes, or medical procedures such as cardioversion or catheter ablation.
Pre-excitation, Mahaim-type, also known as Mahaim fiber or Mahaim's phenomenon, is a condition in which an accessory pathway, or an abnormal electrical pathway in the heart, conducts electrical impulses from the atria to the ventricles. This pathway is located near the atrioventricular node and is called the Kent bundle. In Mahaim-type pre-excitation, the accessory pathway is connected to the atrioventricular node, allowing electrical impulses to bypass the normal conduction system and reach the ventricles directly. This can result in an abnormal heart rhythm, or arrhythmia, known as a supraventricular tachycardia (SVT). Mahaim-type pre-excitation is a rare condition that is typically diagnosed using an electrocardiogram (ECG) and a specialized test called an electrophysiology study. Treatment may include medications to control the heart rate or procedures to ablate, or destroy, the accessory pathway.
Arrhythmias, cardiac refer to abnormal heart rhythms that are not synchronized with the electrical signals that control the heartbeat. These abnormal rhythms can be caused by a variety of factors, including structural abnormalities of the heart, damage to the heart muscle, or problems with the electrical conduction system of the heart. Arrhythmias can range from relatively harmless to life-threatening. Some common types of cardiac arrhythmias include atrial fibrillation, ventricular tachycardia, and atrial flutter. Symptoms of arrhythmias may include palpitations, shortness of breath, dizziness, or fainting. Treatment for arrhythmias may involve medications, lifestyle changes, or medical procedures such as catheter ablation or implantation of a pacemaker or defibrillator.
Tachycardia, Ectopic Junctional, also known as junctional tachycardia, is a type of abnormal heart rhythm that occurs when the electrical impulses that control the heartbeat originate from the wrong part of the heart. In a normal heartbeat, the impulses start in the sinoatrial (SA) node, which is located in the right atrium of the heart. However, in junctional tachycardia, the impulses start in an abnormal area of the heart called the atrioventricular (AV) node or the atrioventricular bundle (bundle of His). Junctional tachycardia can be classified as either a supraventricular tachycardia (SVT) or a ventricular tachycardia (VT). SVT occurs when the impulses start in the upper chambers of the heart (the atria), while VT occurs when the impulses start in the lower chambers of the heart (the ventricles). Junctional tachycardia can cause symptoms such as palpitations, shortness of breath, dizziness, and fainting. It can also lead to more serious complications, such as heart failure, if left untreated. Treatment for junctional tachycardia may include medications, electrical cardioversion, or catheter ablation.
Pulmonary Veno-Occlusive Disease (PVOD) is a rare and progressive lung disease characterized by the narrowing or occlusion of small blood vessels in the lungs, leading to high blood pressure in the pulmonary arteries. This can cause shortness of breath, fatigue, chest pain, and other symptoms. PVOD is often associated with other conditions such as connective tissue disorders, congenital heart defects, and exposure to certain toxins. There is currently no cure for PVOD, and treatment typically involves managing symptoms and improving quality of life.
Heart block is a condition in which the electrical signals that regulate the heartbeat are slowed or blocked as they travel through the heart's conduction system. This can cause the heart to beat too slowly (bradycardia) or irregularly, which can lead to symptoms such as dizziness, fainting, and shortness of breath. There are three main types of heart block: first-degree, second-degree, and third-degree. First-degree heart block is the mildest form and usually does not cause any symptoms. Second-degree heart block is more serious and can cause symptoms, especially if it is caused by an underlying heart condition. Third-degree heart block is the most serious form and can lead to life-threatening complications if not treated promptly. Heart block can be caused by a variety of factors, including damage to the heart muscle, certain medications, and inherited conditions. Treatment options depend on the severity of the heart block and the underlying cause. In some cases, a pacemaker may be necessary to regulate the heartbeat.
Tachycardia, sinus refers to an abnormally fast heart rate that originates from the sinoatrial (SA) node, which is the natural pacemaker of the heart. The SA node is located in the right atrium of the heart and sends electrical signals to the atria to contract and pump blood into the ventricles. Sinus tachycardia is a common type of tachycardia that can occur in healthy individuals during physical activity, stress, or anxiety. It can also be a sign of an underlying medical condition, such as fever, dehydration, heart disease, or thyroid disorders. In some cases, sinus tachycardia may require medical treatment, such as medication or lifestyle changes, to manage symptoms or underlying conditions. However, in many cases, it can be managed with observation and lifestyle modifications alone.
Atrial premature complexes (APCs) are abnormal heartbeats that originate in the atria, which are the upper chambers of the heart. They are also known as atrial premature contractions (APCs) or atrial premature beats (APBs). APCs are a type of arrhythmia, which is an irregular heartbeat. They can occur spontaneously or in response to certain triggers, such as stress, caffeine, or alcohol. APCs are usually harmless and do not cause any symptoms in most people. However, in some cases, they can be a sign of an underlying heart condition and may require medical attention. APCs are typically detected through an electrocardiogram (ECG), which is a test that records the electrical activity of the heart. The ECG can show the pattern of the APCs and help determine if they are a normal variant or a sign of an underlying condition. Treatment for APCs depends on the underlying cause and the severity of the symptoms. In some cases, no treatment may be necessary, and the APCs may resolve on their own. In other cases, medications or other interventions may be recommended to help control the heart rate or prevent further episodes of APCs.
An esophageal fistula is a abnormal connection or passage between the esophagus (the tube that carries food from the mouth to the stomach) and another body cavity or organ, such as the trachea (windpipe), bronchi (airways), stomach, or small intestine. This abnormal connection can be congenital (present at birth) or acquired (occurring later in life due to injury, surgery, or disease). Esophageal fistulas can cause a variety of symptoms, including difficulty swallowing, coughing, chest pain, and recurrent infections. Treatment options depend on the location and severity of the fistula, as well as the underlying cause. In some cases, surgery may be necessary to repair the fistula or remove the affected tissue. In other cases, medications or other medical interventions may be used to manage symptoms and prevent complications.
Premature cardiac complexes, also known as premature beats or PVCs, are extra heartbeats that occur before the normal heartbeat. They are a common type of arrhythmia, which is an abnormal heart rhythm. PVCs can be caused by a variety of factors, including stress, anxiety, caffeine, alcohol, certain medications, and heart disease. They are usually not a serious problem, but in some cases, they can be a sign of an underlying heart condition and may require medical treatment.
Heart injuries refer to any type of damage or trauma that affects the heart or its surrounding structures. These injuries can be caused by a variety of factors, including blunt force trauma, penetration wounds, or sudden cardiac arrest. Some common types of heart injuries include: 1. Contusion: A bruise or contusion on the heart caused by blunt force trauma. 2. Pericardial injury: Damage to the sac that surrounds the heart, which can cause bleeding or inflammation. 3. Cardiac tamponade: A life-threatening condition in which blood or other fluid builds up around the heart, compressing it and preventing it from functioning properly. 4. Myocardial contusion: Damage to the heart muscle caused by blunt force trauma. 5. Cardiac rupture: A tear in the heart muscle or wall, which can cause significant bleeding and be life-threatening. 6. Pericarditis: Inflammation of the pericardium, which can cause chest pain, fever, and other symptoms. 7. Cardiac arrest: A sudden and complete loss of heart function, which can be caused by a variety of factors, including heart attack, electrical disturbances, or sudden cardiac death. Heart injuries can be serious and require prompt medical attention. Treatment may include medications, surgery, or other interventions depending on the severity and type of injury.
In the medical field, a cicatrix is a scar that forms after the healing of a wound or injury. It is typically a raised, thickened area of skin that is usually pale or lighter in color than the surrounding skin. Cicatrices can be caused by a variety of factors, including surgery, burns, acne, and skin infections. They can range in size and appearance, and may be permanent or fade over time. In some cases, cicatrices may cause discomfort or interfere with the function of the affected area. Treatment options for cicatrices may include topical creams, laser therapy, or surgical procedures.
In the medical field, "Burns, Electric" refers to a type of burn injury caused by electrical current. Electric burns can occur when a person comes into contact with an electrical source, such as a live wire or an electrical appliance, and the current flows through their body. The severity of an electric burn can vary depending on several factors, including the voltage of the electrical source, the duration of contact, and the path the current took through the body. Electric burns can cause tissue damage, burns to the skin and underlying tissues, and can also affect internal organs and the nervous system. Treatment for electric burns typically involves removing the person from the source of the electrical current and providing first aid to manage pain and prevent further injury. In more severe cases, medical professionals may need to perform surgery to repair damaged tissues and organs.
Ebstein anomaly is a rare congenital heart defect that affects the tricuspid valve, which is located between the right atrium and right ventricle of the heart. In this condition, the tricuspid valve is not functioning properly, which can lead to a backup of blood in the right atrium and a decrease in blood flow to the lungs and the rest of the body. The tricuspid valve is made up of three flaps, or leaflets, that open and close to allow blood to flow through the valve. In Ebstein anomaly, one or more of these leaflets are abnormal, which can cause them to bulge into the right atrium or to be attached to the wrong part of the heart. This can make it difficult for the valve to open and close properly, which can lead to a backup of blood in the right atrium and a decrease in blood flow to the lungs and the rest of the body. Ebstein anomaly can also cause the right ventricle to become enlarged and weakened, which can lead to heart failure. It is a congenital heart defect, which means that it is present at birth and is not caused by any known environmental factors. Treatment for Ebstein anomaly may include medications to manage symptoms and improve heart function, or surgery to repair or replace the tricuspid valve.
Postoperative complications are adverse events that occur after a surgical procedure. They can range from minor issues, such as bruising or discomfort, to more serious problems, such as infection, bleeding, or organ damage. Postoperative complications can occur for a variety of reasons, including surgical errors, anesthesia errors, infections, allergic reactions to medications, and underlying medical conditions. They can also be caused by factors such as poor nutrition, dehydration, and smoking. Postoperative complications can have serious consequences for patients, including prolonged hospital stays, additional surgeries, and even death. Therefore, it is important for healthcare providers to take steps to prevent postoperative complications and to promptly recognize and treat them if they do occur.
Pre-excitation syndromes, also known as Wolff-Parkinson-White (WPW) syndrome, is a group of heart conditions characterized by an abnormal electrical pathway in the heart that causes the heart to beat too fast or irregularly. This abnormal pathway, called an accessory pathway, bypasses the normal electrical pathway in the heart, leading to a faster heart rate or arrhythmia. There are several types of pre-excitation syndromes, including WPW syndrome, Lown-Ganong-Levine syndrome, and Mahaim syndrome. WPW syndrome is the most common type and is typically diagnosed in young adults. It is caused by an extra electrical pathway that connects the atria and ventricles, allowing electrical signals to bypass the normal pathway and trigger premature contractions or arrhythmias. Symptoms of pre-excitation syndromes can include palpitations, rapid or irregular heartbeat, shortness of breath, dizziness, and fainting. Treatment options for pre-excitation syndromes may include medications to control heart rate and rhythm, cardioversion (a procedure to restore a normal heart rhythm), or catheter ablation (a procedure to destroy the abnormal electrical pathway). In some cases, surgery may be necessary to correct the underlying cause of the pre-excitation syndrome.
Ventricular fibrillation (VF) is a type of abnormal heart rhythm that occurs when the lower chambers of the heart (ventricles) quiver instead of contracting normally. This quivering causes the heart to be unable to pump blood effectively, leading to a lack of oxygen to the body's vital organs and potentially causing sudden cardiac arrest. VF is a medical emergency that requires immediate treatment with defibrillation, a procedure that uses an electric shock to restore the heart's normal rhythm. Without prompt treatment, VF can be fatal.
Catheter-related infections (CRIs) are infections that occur in patients who have a catheter inserted into a vein, artery, or other body cavity. These infections can be caused by bacteria, viruses, fungi, or other microorganisms that enter the body through the catheter insertion site or migrate along the length of the catheter. CRIs are a common complication of catheter use, particularly in hospitalized patients who require long-term catheterization. The risk of developing a CRI increases with the length of time the catheter is in place, the type of catheter used, and the patient's underlying medical condition. Symptoms of CRIs may include fever, chills, redness or swelling at the insertion site, pain or discomfort, and drainage from the insertion site. If left untreated, CRIs can lead to serious complications, such as sepsis, bloodstream infections, and organ damage. To prevent CRIs, healthcare providers follow strict infection control protocols, such as using sterile techniques when inserting and maintaining catheters, regularly changing catheters, and monitoring patients for signs of infection. In some cases, alternative methods of medication delivery, such as oral or intravenous administration, may be used to reduce the risk of CRIs.
Atrioventricular (AV) block is a type of heart rhythm disorder that occurs when the electrical signals that regulate the heartbeat are delayed or blocked as they travel from the atria (upper chambers) to the ventricles (lower chambers) of the heart. This can cause the heart to beat too slowly or irregularly, which can lead to symptoms such as dizziness, fainting, and shortness of breath. There are three main types of AV block: first-degree, second-degree, and third-degree. First-degree AV block is the mildest form and is characterized by a delay in the electrical signal between the atria and ventricles. Second-degree AV block is more severe and is characterized by a partial blockage of the electrical signal, which can result in a slower heart rate. Third-degree AV block is the most severe form and is characterized by a complete blockage of the electrical signal, which can result in a very slow or irregular heart rate. AV block can be caused by a variety of factors, including damage to the heart muscle, certain medications, and underlying heart conditions such as coronary artery disease or heart failure. Treatment for AV block depends on the severity of the condition and may include medications, a pacemaker, or surgery.
Heart diseases refer to a group of medical conditions that affect the heart and blood vessels. These conditions can range from minor to severe and can affect the heart's ability to pump blood effectively, leading to a variety of symptoms and complications. Some common types of heart diseases include: 1. Coronary artery disease: This is the most common type of heart disease, which occurs when the arteries that supply blood to the heart become narrowed or blocked due to the buildup of plaque. 2. Heart failure: This occurs when the heart is unable to pump enough blood to meet the body's needs. 3. Arrhythmias: These are abnormal heart rhythms that can cause the heart to beat too fast, too slow, or irregularly. 4. Valvular heart disease: This occurs when the heart valves become damaged or diseased, leading to problems with blood flow. 5. Congenital heart disease: This refers to heart defects that are present at birth. 6. Inflammatory heart disease: This includes conditions such as pericarditis and myocarditis, which cause inflammation of the heart. 7. Heart infections: These include conditions such as endocarditis and myocarditis, which can cause damage to the heart muscle and valves. Treatment for heart diseases depends on the specific condition and may include medications, lifestyle changes, and in some cases, surgery. Early detection and treatment are important for improving outcomes and reducing the risk of complications.
Cardiac tamponade is a medical emergency that occurs when excess fluid builds up around the heart, causing the heart to become compressed and unable to pump blood effectively. This can lead to a drop in blood pressure, rapid heart rate, and other serious symptoms. The fluid that builds up around the heart can come from a variety of sources, including bleeding from a heart attack, trauma to the chest, or certain medical conditions such as cancer or connective tissue disorders. When the fluid accumulates, it can put pressure on the heart and interfere with its ability to fill with blood and pump it out to the rest of the body. Treatment for cardiac tamponade typically involves removing the excess fluid from around the heart. This can be done through a procedure called pericardiocentesis, in which a needle is inserted through the chest wall to drain the fluid. In some cases, surgery may be necessary to repair the underlying cause of the fluid buildup or to remove any damaged tissue. Cardiac tamponade is a serious condition that requires prompt medical attention. If you or someone you know is experiencing symptoms such as shortness of breath, chest pain, or rapid heart rate, seek medical help immediately.
Cardiomyopathies are a group of heart diseases that affect the heart muscle (myocardium). These diseases can cause the heart to become enlarged, thickened, or rigid, which can lead to problems with the heart's ability to pump blood effectively. There are several different types of cardiomyopathies, including: 1. Hypertrophic cardiomyopathy: This is a condition in which the heart muscle becomes abnormally thick, which can make it difficult for the heart to pump blood. 2. Dilated cardiomyopathy: This is a condition in which the heart muscle becomes weakened and enlarged, which can cause the heart to pump blood less effectively. 3. Arrhythmogenic right ventricular cardiomyopathy (ARVC): This is a condition in which the heart muscle in the right ventricle becomes abnormal and can cause irregular heart rhythms. 4. Non-ischemic dilated cardiomyopathy: This is a type of dilated cardiomyopathy that is not caused by a lack of blood flow to the heart muscle. 5. Idiopathic left ventricular hypertrophy: This is a condition in which the left ventricle of the heart becomes abnormally thick, which can make it difficult for the heart to pump blood. Cardiomyopathies can be inherited or acquired, and they can range from mild to severe. Treatment for cardiomyopathies depends on the specific type and severity of the condition, and may include medications, lifestyle changes, and in some cases, surgery.
Pericardial effusion is a medical condition characterized by the accumulation of fluid in the pericardial sac, which is a sac-like structure that surrounds the heart. The pericardial sac is filled with a small amount of fluid that helps to lubricate and protect the heart. When there is an excessive amount of fluid in the pericardial sac, it can lead to a condition called pericardial effusion. Pericardial effusion can be caused by a variety of factors, including infections, heart failure, cancer, and autoimmune disorders. Symptoms of pericardial effusion may include chest pain, shortness of breath, coughing, and fatigue. In some cases, pericardial effusion may be asymptomatic and discovered incidentally during a routine medical examination. Diagnosis of pericardial effusion typically involves imaging tests such as echocardiography, computed tomography (CT), or magnetic resonance imaging (MRI). Treatment for pericardial effusion depends on the underlying cause and may include medications, drainage of the fluid, or surgery.，，，。
Thromboembolism is a medical condition that occurs when a blood clot (thrombus) forms in a vein or artery and breaks off, traveling through the bloodstream to block a smaller vessel. This can cause a variety of symptoms, depending on the location and size of the clot. When a clot forms in a deep vein, it is called deep vein thrombosis (DVT). If the clot breaks off and travels through the bloodstream to block a smaller vessel, it is called an embolism. An embolism can block blood flow to organs or tissues, leading to serious complications such as stroke, heart attack, or organ damage. Thromboembolism can be caused by a variety of factors, including prolonged immobility, surgery, pregnancy, certain medications, and underlying medical conditions such as cancer or blood disorders. It is a serious medical condition that requires prompt diagnosis and treatment to prevent complications.
Dextrocardia is a medical condition in which the heart is located on the right side of the chest, instead of the left side. This is an abnormal position of the heart, and it is a congenital defect that is present at birth. Dextrocardia can be classified as either dextrocardia with situs solitus or dextrocardia with situs inversus. In dextrocardia with situs solitus, the other organs in the chest and abdomen are arranged in a normal position, with the liver on the right side of the body and the spleen on the left side. In dextrocardia with situs inversus, all of the internal organs are reversed in position, so the liver is on the left side of the body and the spleen is on the right side. Dextrocardia can be associated with other heart defects, such as a or a patent foramen ovale. These defects can affect the flow of blood through the heart and can lead to problems with the heart's ability to pump blood effectively. Treatment for dextrocardia depends on the specific heart defects that are present and may include medications, surgery, or other interventions.
Metaproterenol is a medication that is used to treat bronchospasm, which is a narrowing of the airways in the lungs. It is a type of bronchodilator, which means that it helps to relax the muscles in the airways and make it easier to breathe. Metaproterenol is available in both an inhaler and an oral solution, and it is typically used to treat conditions such as asthma, chronic obstructive pulmonary disease (COPD), and bronchitis. It works by stimulating the release of a chemical called norepinephrine, which helps to relax the muscles in the airways and improve breathing. Metaproterenol is a relatively safe medication, but it can cause side effects such as tremors, nervousness, and rapid heartbeat. It is important to follow the instructions of your healthcare provider when using metaproterenol, and to let them know if you experience any side effects.
Arrhythmogenic Right Ventricular Dysplasia (ARVD) is a genetic heart disorder that affects the right ventricle of the heart. It is characterized by the replacement of healthy heart muscle with fibrous scar tissue, which can lead to abnormal heart rhythms and heart failure. ARVD is often diagnosed in young adults and children, and it can be life-threatening if not treated. The exact cause of ARVD is not fully understood, but it is believed to be related to mutations in certain genes that are involved in the development and maintenance of heart muscle. Treatment for ARVD typically involves medications to control abnormal heart rhythms and lifestyle changes to reduce the risk of sudden cardiac death. In some cases, surgery may be necessary to remove damaged heart muscle or implant a device to regulate the heart's rhythm.
A Bundle-Branch Block (BBB) is a type of heart rhythm disorder that occurs when there is a disruption in the electrical signals that control the contraction of the heart muscle. The heart has two main electrical pathways, called the right and left bundle branches, which carry electrical signals from the sinoatrial node (the heart's natural pacemaker) to the ventricles (the lower chambers of the heart) and cause them to contract and pump blood. A Bundle-Branch Block occurs when there is a delay or blockage in the electrical signals that travel through the bundle branches, causing the ventricles to contract asynchronously or with an abnormal rhythm. This can lead to a variety of symptoms, including palpitations, shortness of breath, dizziness, and fainting. There are two main types of Bundle-Branch Block: Right Bundle-Branch Block (RBBB) and Left Bundle-Branch Block (LBBB). RBBB is more common and usually has no symptoms, while LBBB is less common and can cause more serious symptoms, such as fainting or heart failure. Treatment for Bundle-Branch Block depends on the underlying cause and the severity of the symptoms. In some cases, no treatment may be necessary, while in others, medications or electrical cardioversion may be used to restore a normal heart rhythm. In severe cases, surgery may be necessary to correct the blockage.
Situs inversus is a rare congenital condition in which the internal organs are reversed or mirrored from their normal position. In other words, instead of being located on the left side of the body, the organs are found on the right side, and vice versa. This can affect any or all of the internal organs, including the heart, lungs, liver, stomach, and intestines. Situs inversus is usually diagnosed during fetal development or at birth, and it can be associated with other medical conditions such as congenital heart defects, gastrointestinal abnormalities, and infertility. Treatment for situs inversus depends on the specific organs affected and may include surgery, medication, or other medical interventions.
Atrial remodeling is a term used in the medical field to describe the structural and functional changes that occur in the atria (upper chambers of the heart) as a result of various cardiovascular diseases or conditions. These changes can include thickening of the atrial walls, changes in the size and shape of the atria, and alterations in the electrical activity of the atria. Atrial remodeling is often associated with the development of atrial fibrillation (AF), a common heart arrhythmia characterized by rapid and irregular heartbeats. AF can increase the risk of stroke, heart failure, and other complications, and it is often associated with underlying cardiovascular diseases such as hypertension, heart failure, and valvular heart disease. Atrial remodeling can also occur in response to other conditions, such as myocardial infarction (heart attack), heart failure, and chronic obstructive pulmonary disease (COPD). In these cases, the remodeling process can contribute to the progression of the underlying disease and the development of complications. Treatment for atrial remodeling may involve medications to control symptoms, lifestyle changes to improve overall health, and in some cases, surgical intervention to correct structural abnormalities or restore normal heart function.
Warfarin is an anticoagulant medication that is used to prevent blood clots from forming in the body. It is also used to treat blood clots that have already formed, such as deep vein thrombosis (DVT) or pulmonary embolism (PE). Warfarin works by inhibiting the production of vitamin K, which is necessary for the production of certain clotting factors in the blood. This helps to prevent blood clots from forming and can also help to dissolve existing clots. Warfarin is typically prescribed for people who are at risk of developing blood clots, such as those who have had a previous blood clot or who have certain medical conditions that increase their risk of blood clots. It is usually taken orally and requires regular monitoring of blood clotting levels to ensure that the dose is appropriate and to prevent bleeding complications.
Ventricular outflow obstruction (VOO) is a condition in which there is a blockage or narrowing of the blood vessels that carry blood away from the heart's ventricles. This can cause the ventricles to work harder to pump blood, which can lead to an increase in blood pressure and strain on the heart. VOO can be caused by a variety of factors, including congenital heart defects, heart valve problems, and certain heart diseases. It can also be caused by damage to the heart muscle or blood vessels as a result of a heart attack or other cardiovascular disease. Symptoms of VOO may include shortness of breath, chest pain, fatigue, and swelling in the legs and ankles. Treatment for VOO depends on the underlying cause and may include medications, lifestyle changes, or surgery.
Pathologic constriction refers to a medical condition in which a blood vessel or other tubular structure becomes narrowed or blocked, leading to reduced blood flow or obstruction of the flow of other substances through the vessel. This can occur due to a variety of factors, including inflammation, scarring, abnormal growths, or the presence of a foreign object. Pathologic constriction can have serious consequences, depending on the location and severity of the constriction, and may require medical intervention to treat.
Foreign-body migration is a medical condition in which a foreign object, such as a piece of food, a splinter, or a surgical implant, moves from its original location in the body to a new location. This can occur due to various factors, including the body's natural movements, changes in the shape or size of the foreign object, or the body's immune response to the object. Foreign-body migration can be a serious medical problem, as it can cause inflammation, infection, or damage to surrounding tissues. In some cases, the foreign object may become trapped in a narrow passage or obstruct a vital organ, leading to serious complications. Treatment for foreign-body migration depends on the location and size of the object, as well as the severity of any associated complications. In some cases, the object may be able to be removed through minimally invasive procedures, such as endoscopy or laparoscopy. In more severe cases, surgery may be necessary to remove the object and repair any damage caused by its migration.
Hybrid cardiac surgery
Paroxysmal supraventricular tachycardia
Permanent junctional reciprocating tachycardia
George S. Abela
List of Johnson & Johnson products and services
Management of atrial fibrillation
Inappropriate sinus tachycardia
Myocardial infarction diagnosis
Premature ventricular contraction
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Weight loss before Afib ablation procedure results in improved outcomes among obese patients
- Radiofrequency ablation uses heat energy to eliminate the problem area. (medlineplus.gov)
- By reducing the critical mass required to sustain AF through either surgical or catheter-based compartmentalization of the atria (ie, maze procedure), fibrillatory wavelets collide with fixed anatomic obstacles, such as suture lines or complete lines of ablation, thus eliminating or reducing the development of permanent AF. (medscape.com)
- Cardiac ablation is a procedure that is used to scar small areas in your heart that may be involved in your heart rhythm problems . (medlineplus.gov)
- Catheter ablation is a long procedure. (medlineplus.gov)
- A procedure called catheter ablation (when a thin, flexible tube is inserted through veins or arteries into the heart) may also be used to treat AFib. (medlineplus.gov)
- [ 19 ] The clinical decision to use a rhythm-control or rate-control strategy requires an integrated consideration of several factors, including degree of symptoms, likelihood of successful cardioversion, presence of comorbidities, and candidacy for AF ablation (eg, catheter-based pulmonary vein electric isolation or surgical ablation). (medscape.com)
- Cardiac ablation is used to treat certain heart rhythm problems that medicines are not controlling. (medlineplus.gov)
- A small, flexible tube (catheter) will be inserted through this cut into one of the blood vessels in the area. (medlineplus.gov)
- Once the source of the problem has been found, one of the catheter lines is used to send electrical (or sometimes cold) energy to the problem area. (medlineplus.gov)
- Some patients with focal origins of their AF also may be candidates for catheter ablation. (medscape.com)
- AF ablation methods continue to be studied and modified and thus may be considered as a work in progress rather than a mature primary therapy. (medscape.com)
- Once the catheter is in place, your cardiologist will place small electrodes in different areas of your heart. (medlineplus.gov)
- Two big trials, presented at the ESC meeting and published in the New England Journal of Medicine ( NEJM ), addressed the use of imaging to place stents in the cath lab. (medscape.com)
- The cardiologist will use live x-ray images to carefully guide the catheter up into your heart. (medlineplus.gov)
- Of the 77 patients in the ablation group, 25 (32%) underwent repeat ablation (20 for recurrent AF, 5 for atrial flutter). (medscape.com)
- Left atrial ablation and ablation for persistent atrial flutter should not be performed in the presence of known atrial thrombus. (medscape.com)
- The catheters are used to create lesions during cardiac ablation procedures to treat atrial flutter. (cardiacrhythmnews.com)
- There is no published randomized study comparing amiodarone therapy and radiofrequency catheter ablation (RFA) after only 1 episode of symptomatic atrial flutter (AFL). (nih.gov)
- Radiofrequency catheter ablation (RFCA) has revolutionized treatment for tachyarrhythmias and has become first-line therapy for some tachycardias. (medscape.com)
- Radiofrequency catheter ablation (RFCA) has been applied to most clinical tachycardias, even to polymorphic VT and VF in preliminary studies. (medscape.com)
- 1) Background: Computer tomography (CT) is an imaging modality used in the pre-planning of radiofrequency catheter ablation (RFA) procedure in patients with cardiac arrhythmias. (muni.cz)
- Dormant" pulmonary vein conduction revealed by adenosine after ostial radiofrequency catheter ablation. (acc.org)
Effect of Catheter Ablation2
- Effect of Catheter Ablation vs Antiarrhythmic Drug Therapy on Mortality, Stroke, Bleeding, and Cardiac Arrest Among Patients With Atrial Fibrillation: The CABANA Randomized Clinical Trial. (nih.gov)
- Effect of Catheter Ablation vs Medical Therapy on Quality of Life Among Patients With Atrial Fibrillation: The CABANA Randomized Clinical Trial. (nih.gov)
- Field Medical is developing a promising second-generation pulse field ablation (PFA) system for the $3.6B cardiac catheter ablation market - a market rapidly accelerating at 14% CAGR. (klfy.com)
- Field Medical intends to expand the indications for pulsed field ablation (PFA) beyond atrial fibrillation therapy by addressing much more challenging arrhythmias in the ventricle and common procedures like supraventricular tachycardia (SVT) that require minimal sedation. (klfy.com)
- Ablation may also be done by freezing tissue (called cryoablation), destroying tissue with a laser (laser ablation), or by applying short bursts of high voltage electrical energy (called pulsed electrical field ablation). (msdmanuals.com)
Cardiac catheter ablation1
- 18. FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance. (nih.gov)
Antiarrhythmic Drug Therapy1
- Antiarrhythmic drug therapy has been the primary treatment for AF for decades, but limited effectiveness combined with incompletely assessed risks have led to the development of other strategies to maintain sinus rhythm, such as ablation. (nih.gov)
- Patients who remained in sinus rhythm after ablation had a significant mean increase in LVEF, decrease in left-atrial size, and decline in AF symptom score. (medscape.com)
- [ 3 , 11 ] Both left atrial ablation for restoration of sinus rhythm and AV junction ablation for rate control are class I indications, depending on the circumstance. (medscape.com)
- High-density maps of left atrial (LA) were constructed using a circular mapping catheter. (edu.au)
- Pulmonary vein isolation (PVI) was performed using an irrigated-tip radiofrequency ablation catheter guided by a circular mapping catheter. (acc.org)
- After isolation of the LSPV, no pulmonary vein potentials (PVP) are observed during the first two beats, with the circular mapping catheter (PV 1,2 to PV 19,20) recording only atrial far-field signals (A). Adenosine administration (12 mg IV bolus) results in AV block with transient recovery of PV conduction. (acc.org)
- Catheter-based ablation is a typical strategy for treating cardiovascular arrhythmias yet conveys a gamble of inadvertent blow-back to solid encompassing tissue. (articlequarter.com)
- Catheter ablation of ventricular arrhythmias has proven efficacious in reducing the burden of arrhythmias and reducing implantable cardiac defibrillator (ICD) shocks. (ucsf.edu)
- The aim of this study is to create a prospective international database registry that will allow for better assessment of the outcomes of catheter ablation of ventricular arrhythmias. (ucsf.edu)
- The company's core products - the FieldForce™ Catheter and the FieldForce™ Generator - use proprietary technology called FieldBending™ - which represents a major step forward to overcome limitations of first-generation PFA technologies and address a huge unmet need to treat any cardiac arrhythmia while expanding capabilities to also treat complex ventricular arrhythmias. (klfy.com)
- Catheter-based cryoablation was developed after RFCA, and it utilizes tissue cooling to cause tissue necrosis. (medscape.com)
- Though not as versatile or widely used compared to RFCA, cryoablation is safer for ablation near the compact atrioventricular (AV) node. (medscape.com)
- 20. Needle-based ablation of renal parenchyma using microwave, cryoablation, impedance- and temperature-based monopolar and bipolar radiofrequency, and liquid and gel chemoablation: laboratory studies and review of the literature. (nih.gov)
- The term ablative therapies applies to trans-arterial catheter chemoembolization (TACE), radiofrequency ablation (RFA) and cryoablation (CA). (nih.gov)
- Both groups started amiodarone (200 mg daily) 6 weeks before the ablation group underwent their procedures. (medscape.com)
- The ablation group continued the amiodarone for 3 months postablation and were permitted one cardioversion if needed. (medscape.com)
- In the powerful AATAC multicenter worldwide randomized trial, catheter ablation was compared to drug treatment with amiodarone (the most effective but also the most toxic of the antiarrhythmic drugs). (a-fib.com)
- Patients were randomized to receive either a catheter ablation or drug treatment with amiodarone. (a-fib.com)
Success of ablation1
- Now scientists are using ultrasound for more accurate maps of arrhythmic sites in the heart for improved success of ablation procedures. (nih.gov)
- Of the 69 controls, 53 (77%) elected to undergo circumferential ablation for recurrent AF and only 3 (4%) converted to sinus rhythm without any drug therapy. (medscape.com)
- To participate in this study, you must not have had a catheter ablation procedure to treat atrial fibrillation, had surgery to replace your heart valves, or been treated for sleep apnea. (nih.gov)
- A cryoballoon has been developed for pulmonary vein isolation, the minimal objective in catheter ablation of atrial fibrillation, and it appears roughly comparable to point to point RFCA. (medscape.com)
- Participants in the catheter ablation group underwent pulmonary vein isolation, with additional ablative procedures at the discretion of site investigators. (nih.gov)
- After pulmonary vein isolation, regions with the top 10% of the highest dyssynchrony in LA were targeted during ablation and followed with ablation of complex atrial electrograms. (edu.au)
- Because AFib usually begins in the pulmonary veins or at their attachment to the left atrium, energy is applied around the connections of the pulmonary veins to the left atrium during the pulmonary vein ablation procedure (also called pulmonary vein antrum isolation or PVAI). (tgh.org)
- However, the ablation strategy apart from electrical isolation of PV in patients with persistent AF is still not well defined. (minervamedica.it)
- The endpoint of electrical pulmonary vein isolation (entrance and exit block) was confirmed in each of the 4 PVs after an observation time of 30 minutes post ablation (Figure 2). (acc.org)
- Catheter ablation of atrial fibrillation (AF), a procedure now widely performed in major electrophysiology laboratories, has been studied most carefully in patients with paroxysmal AF. (medscape.com)
- Eligible patients were aged 65 years and older or younger than 65 years with 1 or more risk factors for stroke (hypertension, heart failure, history of stroke, diabetes, or other heart problems), had 2 or more episodes of paroxysmal AF or 1 episode of persistent AF in the prior 6 months, and were suitable for catheter-based treatment or rhythm and/or rate control drug therapy. (nih.gov)
- The objective of this registry is to collect prospective data on patients undergoing catheter ablation for Ventricular Tachycardia (VT) and Premature Ventricular Contractions (PVC). (ucsf.edu)
- All patients undergoing catheter ablation for ventricular tachycardia (VT) or premature ventricular contractions (PVCs). (ucsf.edu)
- Dr. Beyerbach brings extensive knowledge of clinical cardiac electrophysiology with a specialty focus in catheter ablation treatment of atrial fibrillation and ventricular tachycardia (VT). (thechristhospital.com)
- People who underwent ablation did have a reduced risk of their condition recurring and reported greater quality of life improvements. (nih.gov)
- Lesion size is influenced, in part, by the length of the distal ablation electrode and the type of catheter (standard vs saline-cooled). (medscape.com)
- 3. Ex vivo experiment of saline-enhanced hepatic bipolar radiofrequency ablation with a perfused needle electrode: comparison with conventional monopolar and simultaneous monopolar modes. (nih.gov)
- 10. Multiple-electrode radiofrequency ablation of in vivo porcine liver: comparative studies of consecutive monopolar, switching monopolar versus multipolar modes. (nih.gov)
- Most often, the abnormal area is destroyed by radiofrequency ablation (delivery of energy of a specific frequency through a catheter with a tiny electrode at its tip that is inserted into the heart). (msdmanuals.com)
- With typical power settings and good catheter contact pressure with cardiac tissue, lesions are minimally about 5-7 mm in diameter and 3-5 mm in depth. (medscape.com)
- Your doctor will aim the tip of a special catheter at the small area of heart tissue. (nih.gov)
- During ablation, an electrical frequency is delivered through flexible catheters inserted into the heart via a vein in the leg to eliminate tissue that either triggers or perpetuates atrial fibrillation. (tgh.org)
- Energy is delivered through the tip of the catheter to the tissue targeted for ablation. (tgh.org)
- 12. Finite element modeling of cooled-tip probe radiofrequency ablation processes in liver tissue. (nih.gov)
- Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. (nih.gov)
- Some catheters have wire electrodes that record and locate the source of your abnormal heartbeats. (nih.gov)
- Once the catheter is in place, your cardiologist will place small electrodes in different areas of your heart. (medlineplus.gov)
- 2. Hepatic bipolar radio-frequency ablation between separated multiprong electrodes. (nih.gov)
- 4. Wet radio-frequency ablation using multiple electrodes: comparative study of bipolar versus monopolar modes in the bovine liver. (nih.gov)
- 8. Switching monopolar radiofrequency ablation technique using multiple, internally cooled electrodes and a multichannel generator: ex vivo and in vivo pilot study. (nih.gov)
- 19. Finite element analyses of uniform current density electrodes for radio-frequency cardiac ablation. (nih.gov)
- Ablation is done through a procedure called cardiac catheterization that passes flexible tubes, or catheters, through your blood vessels until they reach your heart. (nih.gov)
- Compared with medications, a procedure called catheter ablation did not significantly reduce the risk of death or serious complications from atrial fibrillation. (nih.gov)
- But a procedure called catheter ablation has also become common. (nih.gov)
- A procedure called catheter ablation (when a thin, flexible tube is inserted through veins or arteries into the heart) may also be used to treat AFib. (medlineplus.gov)
- Cite this: Catheter Ablation of Chronic AFib - Medscape - Mar 23, 2006. (medscape.com)
- Catheters were first used for intracardiac recording and stimulation in the late 1960s, but surgical treatment for refractory tachyarrhythmias was the mainstay of nonpharmacologic therapy until it was superseded by catheter ablation. (medscape.com)
- For these conditions, catheter ablation is first-line therapy if that is the patient's preference. (medscape.com)
- [ 12 ] Catheter ablation is first-line therapy in idiopathic VT if that is the patient's preference. (medscape.com)
- In structural heart disease, catheter ablation is generally performed for drug inefficacy or intolerance, or as adjunctive therapy in patients with an implantable cardioverter-defibrillator (ICD) who are experiencing frequent ICD shocks. (medscape.com)
- To determine whether catheter ablation is more effective than conventional medical therapy for improving outcomes in atrial fibrillation. (nih.gov)
- 1108 patients were randomized to the catheter ablation group and 1096 to the medical therapy group. (nih.gov)
- Eligible participants were randomized to either the catheter ablation group or the medical therapy group. (nih.gov)
- Among patients with AF, the strategy of catheter ablation, compared with medical therapy, did not significantly reduce the primary composite end point of death, disabling stroke, serious bleeding, or cardiac arrest. (nih.gov)
- The availability of MediGuide ablation catheter tools allows us to effectively treat patients with ablation therapy using minimal exposure to radiation," said Chun Hwang, director Cardiac Electrophysiology, Utah Valley Regional Medical Center, Provo, USA, who performed the first procedure with the new ablation catheter. (cardiacrhythmnews.com)
- Just under 20% of people in the ablation group required a second procedure due to recurrent symptoms. (nih.gov)
- INTRODUCTION: Catheter ablation (CA) is an established and widespread treatment option for drug refractory atrial fibrillation (AF). (minervamedica.it)
- RF energy, a low-voltage, high-frequency form of electrical energy familiar to physicians from its use in surgery (eg, electrocautery), quickly supplanted DC ablation. (medscape.com)
- A Hagendorff, Leipzig Update on valvular guidelines V Falk, Berlin How to deal with severe MAC - catheter-based options R Smith, Dallas Mitral surgery for rheumatic heart disease T Chotivatanapong, Nonthaburi Cardiac surgery in the developing world V Jawali, Bangalore Should we be doing more mitral clips than conventional mitral valve surgery? (eacts.org)
- Sometimes surgery is needed because catheter-based ablation was not effective. (msdmanuals.com)
- Santangeli, P & Di Biase, L 2017, ' Prophylactic mechanical hemodynamic support for catheter ablation of VT: locking the barn door before the horse has bolted ', Journal of Interventional Cardiac Electrophysiology , vol. 48, no. 1. (elsevierpure.com)
- Ablation is one of the common, minimally invasive types of electrophysiology procedures. (tgh.org)
- A small, flexible tube (catheter) will be inserted through this cut into one of the blood vessels in the area. (medlineplus.gov)
- During the procedure, a physician inserts catheters (long, flexible tubes) into the blood vessels of the leg and sometimes the neck, and guides the catheters into the atrium. (tgh.org)
- 16. Hepatic bipolar radiofrequency ablation creates coagulation zones close to blood vessels: a finite element study. (nih.gov)
- Catheter ablation is a procedure to stop abnormal electrical signals from moving through your heart and causing an irregular heartbeat. (nih.gov)
- Once the source of the problem has been found, one of the catheter lines is used to send electrical (or sometimes cold) energy to the problem area. (medlineplus.gov)
- Comparing adenosine-guided PVI to historical control groups without adenosine-guided ablation, a reduction in AF recurrence was noted. (acc.org)
- The relative safety of RF energy has contributed to the widespread adoption of catheter ablation as a therapeutic modality. (medscape.com)
- There are three class I indications for catheter ablation. (medscape.com)
- High power bipolar ablation of a thick myocardium: ex-vivo study using externally-irrigated large-tip ablation catheters. (escardio.org)
- 7. Improved perfusion system for bipolar radiofrequency ablation of liver: preliminary findings from a computer modeling study. (nih.gov)
- 13. Modeling bipolar phase-shifted multielectrode catheter ablation. (nih.gov)
- About a quarter of people initially assigned to receive drugs chose to undergo an ablation at some point during the trial. (nih.gov)
- Cardiac ablation procedures are done in a hospital laboratory by trained staff. (medlineplus.gov)
- The new MediGuide enabled ablation catheters expand the utility of the MediGuide system, which is an important platform that provides clinicians with the ability to reduce the duration of radiation exposure and improve the accuracy and consistency of procedures", said Frank J Callaghan, president of the St Jude Medical Cardiovascular and Ablation Technologies Division. (cardiacrhythmnews.com)
- For instance, does the technique reduce the time for the procedure, including reduced time under anesthesia, and does EWI ultimately reduce the cost of ablation procedures? (nih.gov)
- However, despite those characteristics, its utility in guiding catheter ablation of AF is limited suggesting other factors are responsible for AF persistence. (edu.au)
- It hasn't been clear whether catheter ablation is more effective than drugs in reducing the risk of death or serious complications of atrial fibrillation. (nih.gov)
- In the mathematical model, virtual ablation at high dyssynchrony regions resulted in conduction regularization. (edu.au)
- Injecting IV adenosine to restore conduction in viable but acutely non-conducting PVs may distinguish permanent block from dormant PV conduction, thereby allowing additional targeted ablation. (acc.org)
- Although these retrospective studies are promising, a prospective randomized controlled trial is currently being performed to definitely address the critical question of whether ablation at sites of adenosine-induced transient PV re-conduction improves outcomes after PVI. (acc.org)
- 1. Finite-element analysis of hepatic multiple probe radio-frequency ablation. (nih.gov)
- 6. Three-Dimensional finite-element analyses for radio-frequency hepatic tumor ablation. (nih.gov)
- 17. Guidelines for predicting lesion size at common endocardial locations during radio-frequency ablation. (nih.gov)
- Significant progress has been made in improving our understanding and ability to target the triggers of VF, via advanced mapping and ablation techniques , as well as with autonomic modulation. (bvsalud.org)
- People in the ablation group also reported higher quality of life and fewer symptoms during the years of follow-up. (nih.gov)
- Doctors perform catheter ablation in a hospital. (nih.gov)
- If drugs failed to control the condition, participants could receive ablation. (nih.gov)