Which ECG change is most commonly associated with myocardial ischemia?
ST segment depression
Classical myocardial ischaemia on the ECG shows horizontal or down-sloping ST-segment depression of at least 1 mm, 60–80 ms past the J point, in leads overlying the ischaemic territory — most commonly seen during exercise, angina or demand ischaemia.
U waves (hypokalaemia), tall T waves (acute hyperkalaemia or very early STEMI) and prolonged QT (electrolyte or drug effects) are not the most common and specific ECG marker of ischaemia.
Hence, ST segment depression.
Similar Questions
A patient presents with chest pain and ST elevation in leads II, III, and aVF. According to the universal definition of MI, which coronary artery is most likely involved, and what is the ECG diagnosis?
Which ECG change is most characteristic of an acute myocardial infarction?
Which segment is primarily analyzed to diagnose an ST-elevation myocardial infarction (STEMI)?
What is a typical ECG finding in patients with cerebral infarct?
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Which ECG finding most reliably indicates myocardial ischemia rather than established myocardial infarction?
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Important Questions from Introduction to Cardiovascular Diseases
A patient presents with chest pain and ST elevation in leads II, III, and aVF. According to the universal definition of MI, which coronary artery is most likely involved, and what is the ECG diagnosis?
Which ECG change is most characteristic of an acute myocardial infarction?
Which segment is primarily analyzed to diagnose an ST-elevation myocardial infarction (STEMI)?
What is a typical ECG finding in patients with cerebral infarct?
In the context of CVS monitoring, which finding in myxedema patients could be explained by their ECG pattern?
