Final answer:
ST depression in SVT is generally not the primary concern, whereas ST elevation in aVR or other leads may indicate serious conditions such as acute myocardial infarction and requires careful ECG interpretation.
Step-by-step explanation:
The student's question focuses on the significance of ST segment changes in the context of supraventricular tachycardia (SVT) and concerns regarding ST depression and ST elevation, particularly in lead aVR. In the context of SVT, ST depression is not typically the primary concern; however, ST elevation, especially in aVR, can indicate a more serious condition like left main coronary artery ischemia or severe global ischemia. Therefore, it's important to assess ST elevations in any lead, as they could signify acute myocardial infarction (MI). An ECG interpretation is crucial in diagnosing these conditions, and although a certain degree of training is necessary to interpret ECGs, recognizing ST segment deviations is fundamental in the assessment of cardiac function.