During Mild Exertion a 70-Year-Old Man Has an Ischemia-Induced Myocardial

question 10

Multiple Choice

During mild exertion a 70-year-old man has an ischemia-induced myocardial infarction and dies from ventricular fibrillation. In this patient, which factor was most likely to increase the tendency of the heart to fibrillate after the infarction?

• A)Increased parasympathetic stimulation of the heart
• B)A decrease in ventricular diameter
• C)Low potassium concentration in the heart extracellular fluid
• D)A more negative ventricular membrane potential
• E)Current of injury from the damaged area

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