What is the significance of a flat or inverted T wave?

• A. Normal heart activity
• B. Potential ischemia or electrolyte imbalance
• C. Heart failure
• D. Atrial enlargement

Answer: (B)

A flat or inverted T wave is significant because it can indicate potential ischemia or an electrolyte imbalance. T waves reflect the repolarization of the ventricles in the heart. When these waves are flat or inverted, it suggests that the cardiac myocytes may not be recovering their electrical charge appropriately.

This can be a sign of ischemia, where heart tissue is not receiving enough blood flow and oxygen, potentially leading to angina or even a heart attack if left unaddressed. Furthermore, a flat or inverted T wave can be associated with electrolyte imbalances, particularly concerning potassium, calcium, and magnesium levels, which are critical for normal cardiac function.

Monitoring T wave morphology is therefore vital in assessing cardiac health, as changes can indicate underlying pathologies that may require immediate intervention. Recognizing the significance of these changes is essential in ECG interpretation and patient management.