Which ECG finding is indicative of Digoxin toxicity?

Which ECG finding is indicative of Digoxin toxicity?

• A. Prolonged QT interval
• B. T wave inversion
• C. ST elevation
• D. Bradycardia

Answer: (B)

The correct answer highlights that T wave inversion can indicate digoxin toxicity. Digoxin affects the heart's electrical activity and can alter the repolarization phase of the cardiac cycle. One of the hallmark ECG changes associated with digoxin toxicity is the appearance of specific T wave changes, such as T wave inversion or a scooped appearance. This is due to the drug's impact on the cardiomyocyte's ion exchanges, especially affecting potassium and calcium concentrations. While other options may represent various cardiac or electrolyte abnormalities, they are not specific indicators of digoxin toxicity. For example, prolonged QT interval and ST elevation can occur due to numerous other conditions or drug effects, but they do not specifically point towards digoxin. Bradycardia, although a common effect of digoxin, does not provide a specific electrocardiographic finding and may arise from other causes as well. Thus, the presence of T wave inversion is a key diagnostic marker in identifying potential digoxin toxicity.

The correct answer highlights that T wave inversion can indicate digoxin toxicity. Digoxin affects the heart's electrical activity and can alter the repolarization phase of the cardiac cycle. One of the hallmark ECG changes associated with digoxin toxicity is the appearance of specific T wave changes, such as T wave inversion or a scooped appearance. This is due to the drug's impact on the cardiomyocyte's ion exchanges, especially affecting potassium and calcium concentrations.

While other options may represent various cardiac or electrolyte abnormalities, they are not specific indicators of digoxin toxicity. For example, prolonged QT interval and ST elevation can occur due to numerous other conditions or drug effects, but they do not specifically point towards digoxin. Bradycardia, although a common effect of digoxin, does not provide a specific electrocardiographic finding and may arise from other causes as well. Thus, the presence of T wave inversion is a key diagnostic marker in identifying potential digoxin toxicity.