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Sudden Cardiac Death in Ischemic Heart Disease: Pathophysiology and Risk Stratification

Nabil El-Sherif, Mohamed Boutjdir, Gioia Turitto
Cardiac Electrophysiology Clinics 2017, 9 (4): 681-691
29173410
Sudden cardiac death (SCD) accounts for approximately 360,000 deaths annually in the United States. Ischemic heart disease is the major cause of death in the general adult population. SCD can be due to arrhythmic or nonarrhythmic cardiac causes. Arrhythmic SCD may be caused by ventricular tachyarrhythmia or pulseless electrical activity/asystole. This article reviews the most recent pathophysiology and risk stratification strategies for SCD, emphasizing electrophysiologic surrogates of conduction disorder, dispersion of repolarization, and autonomic imbalance. Factors that modify arrhythmic death are addressed.

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