Final answer:
Elevated ST segments are most commonly seen on an ECG strip of a patient with an MI. They help diagnose and differentiate between STEMI and non-STEMI myocardial infarctions, supported by additional tests like echocardiography and cardiac enzyme levels.
Step-by-step explanation:
The most commonly seen feature on the ECG strip of a patient with myocardial infarction (MI) is elevated ST segments. This finding is significant for diagnosing an MI and differentiating between types known as ST-elevated MI (STEMI) and non-ST-elevated MI (non-STEMI). Additional tests such as echocardiography and blood tests for creatine kinase MB and cardiac troponin can also indicate MI. Elevation of the ST segment above the baseline is a key sign of acute MI, whereas a suppressed or inverted T wave may suggest hypoxia. While other abnormalities in the ECG such as flattened T waves or enlarged Q waves may be present, the elevated ST segment is most indicative of an acute MI.