A 60-year-old man experienced an ischemia-induced myocardial infarction and died from ventricular fibrillation. What factor was most likely to increase the tendency of the heart to fibrillate after the infarction?

Question

Quizplus · Accepted Answer

Increased sympathetic stimulation of the heart can cause an increase in heart rate and contractility, leading to increased oxygen demand and potentially worsening ischemia. Additionally, sympathetic stimulation can increase the likelihood of ventricular fibrillation, as it increases the automaticity and excitability of cardiac cells, making them more prone to arrhythmias.

A 60-Year-Old Man Experienced an Ischemia-Induced Myocardial Infarction and Died