What does a "dipped" T wave suggest on an ECG?

A "dipped" T wave on an ECG indicates possible myocardial ischemia or electrolyte imbalances. This alteration in the T wave morphology can suggest that there are issues with the heart's oxygen supply or a disturbance in the levels of electrolytes, such as potassium or calcium, which are crucial for proper heart function and electrical activity.

In the context of myocardial ischemia, the heart muscle is not receiving enough blood flow, which can affect the repolarization phase of the cardiac cycle, resulting in changes to the T wave. Similarly, fluctuations in electrolyte levels can significantly impact cardiac conduction, leading to observable changes on the ECG. Therefore, the presence of a dipped T wave should warrant further investigation into these potential underlying issues, as they are clinically significant and may require immediate attention to prevent further complications.