Which symptom is least likely to be associated with coronary artery spasm?

Coronary artery spasm is a condition that can lead to a temporary reduction or cessation of blood flow to the heart muscle, often resulting in symptoms such as chest pain, ST segment changes on an ECG, and potentially unstable angina. These symptoms arise due to the ischemic effects of the reduced blood flow.

Chest pain, commonly known as angina, is a hallmark symptom of coronary artery spasm. Patients often experience this discomfort during episodes of spasm, and it is typically relieved with rest or nitroglycerin.

ST segment elevation on an ECG is also observed during episodes of coronary artery spasm. This elevation reflects the acute ischemia caused by the spasm and can be transient in nature, returning to baseline once the spasm resolves.

Unstable angina may also occur due to coronary artery spasm, as it represents a change in the pattern of angina, potentially occurring at rest and indicating an increased risk of progression to myocardial infarction or other serious heart conditions.

In contrast, a heart murmur is not typically associated with coronary artery spasm. Murmurs are usually indicative of valvular heart disease or structural abnormalities within the heart and do not result from the ischemic processes triggered by coronary artery spasms. Therefore