Which in ECG is the most important for differential diagnosis between myocardial infarction and variant angina pectoris?
Understand the Problem
The question is asking about a specific aspect of the electrocardiogram (ECG) that is crucial for distinguishing between myocardial infarction and variant angina pectoris.
Answer
ST segment elevation differentiates MI from variant angina on ECG.
ST segment elevation in an ECG is a key indicator for differentiating myocardial infarction from variant angina pectoris. Myocardial infarction often shows ST elevation, while variant angina can also cause temporary ST elevation due to coronary artery spasm.
Answer for screen readers
ST segment elevation in an ECG is a key indicator for differentiating myocardial infarction from variant angina pectoris. Myocardial infarction often shows ST elevation, while variant angina can also cause temporary ST elevation due to coronary artery spasm.
More Information
In myocardial infarction (MI), persistent ST segment elevation is commonly seen, which indicates a more severe and lasting blockage. Variant angina, also known as Prinzmetal's angina, shows transient ST elevation due to spasms in the coronary arteries.
Tips
A common mistake is assuming any ST elevation on ECG indicates MI; variant angina can also cause temporary ST elevation.
Sources
- ST elevation: Differential diagnosis and caveats. A comprehensive ... - sciencedirect.com
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