Related Experiment Video
Updated: Jul 7, 2026
28:13
Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
Update on atrial fibrillation: part I.
1St George's University of London, Cranmer Terrace, London, U.K.
Clinical Cardiology
|February 8, 2008
Summary
Atrial fibrillation (AF) is a growing epidemic. Understanding its causes, mechanisms like atrial remodeling, and new treatments like novel anticoagulants and mechanical devices is crucial for managing stroke risk.
Area of Science:
- Cardiology
- Electrophysiology
- Pharmacology
Background:
- Atrial fibrillation (AF) affects 1-1.5% of the population, with prevalence projected to triple by 2050.
- Hypertension and heart failure are common causes, creating an arrhythmogenic substrate for AF.
- AF significantly increases stroke risk by 5-fold.
Purpose of the Study:
- To review the epidemiology, causes, and mechanisms of atrial fibrillation.
- To discuss current and emerging therapeutic strategies for AF-related stroke prevention.
Main Methods:
- Review of existing literature on atrial fibrillation epidemiology, pathophysiology, and treatment.
- Analysis of data on novel antithrombotic drugs and mechanical devices.
Main Results:
- AF mechanisms involve single or multiple foci and atrial remodeling, influenced by factors like Angiotensin II.
- New oral anticoagulants (dabigatran, rivaroxaban, apixaban) offer alternatives to warfarin.
- Mechanical approaches like left atrial appendage occlusion are emerging for stroke prevention.
Conclusions:
- AF poses a significant health and economic burden, necessitating effective management strategies.
- Targeting atrial remodeling and utilizing novel anticoagulants/devices are key to reducing AF-related morbidity, particularly stroke.
Related Concept Videos
01:25Dysrhythmias VI: Management of Dysrhythmias
Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
01:29Disturbances in Heart Rhythm
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
01:30Dysrhythmias V: Evaluating Dysrhythmias
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
01:28Dysrhythmias II: Classification of Tachyarrhythmias
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
01:15Dysrhythmias I: Introduction
Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...