Late potentials have been detected in 73-92% of patients with sustained and inducible ventricular tachycardia after MI. Late potentials also have been identified in patients with nonischemic heart disease and ventricular tachycardia, such as those with dilated cardiomyopathy. Early use of thrombolytic agents reduces the prevalence of late potentials after coronary occlusion and therefore the risk of sudden death, ventricular fibrillation, and tachycardia.
Late potentials after MI are an independent marker of patients at high risk for ventricular tachycardia. SAECG results combined with other noninvasive data (e.g., Holter, ETT, ejection fraction) provide a highly sensitive and highly specific method of identifying patients at risk for ventricular tachycardia or sudden death.
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