A 50-year-old man with a history of coronary artery disease develops unstable angina. Which is the primary mechanism of transient myocardial ischemia?
Q1. A 50-year-old man with a history of coronary artery disease develops unstable angina. Which is the primary mechanism of transient myocardial ischemia?
Answer: Coronary artery spasm
Explanation: Coronary artery spasm fails to cause transient myocardial ischemia without decreased myocardial contractility.