Related Experiment Video
Updated: Jun 6, 2026
09:36
Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
[Early repolarization syndrome and recurrent syncope in two Chinese pedigrees]
Zhen-ni TAN1, Wei DENG, Yuan-yuan LUO
1Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Zhonghua Xin Xue Guan Bing Za Zhi
|November 25, 2010
Summary
Early repolarization syndrome (ERS) can lead to serious cardiac events like syncope and ventricular arrhythmias, not always a benign condition. Family screening is crucial for identifying at-risk individuals.
Area of Science:
- Cardiology
- Clinical Electrophysiology
- Genetics
Background:
- Early repolarization syndrome (ERS) is an electrocardiographic finding often considered benign.
- However, its association with cardiac events, particularly in familial contexts, requires further investigation.
Purpose of the Study:
- To investigate the clinical characteristics of Early Repolarization Syndrome (ERS) in two families.
- To understand the link between ERS, syncope, and potentially life-threatening arrhythmias within these families.
Main Methods:
- Comprehensive clinical screening of all family members, including probands.
- Utilized electrocardiography (ECG), echocardiography, Holter monitoring, chest X-ray, head-up tilt test, and blood biochemistry.
Main Results:
- No organic heart disease was found in either family.
- Proband 1 experienced recurrent syncope, ERS, and documented torsade de pointes (TdP) ventricular tachycardia and ventricular fibrillation.
- Proband 2 presented with recurrent syncope and ERS; his father had sudden cardiac death, and a nephew had asymptomatic ERS.
Conclusions:
- Early Repolarization Syndrome (ERS) is not invariably benign and can be associated with severe outcomes.
- Recurrent syncope, TdP, and ventricular fibrillation are potential complications of ERS.
- Pedigree research is essential for understanding the clinical implications and inheritance patterns of ERS.
Related Concept Videos
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...
01:30Cardiac Action Potential
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
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...
01:15Dysrhythmias 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...
01:29Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.