MCQ 11: Tachycardia induced cardiomyopathy

Q. Most common cause of tachycardia induced cardiomyopathy is?
A. Atrial flutter
B. Atrial fibrillation
C. Ventricular tachycardia
D. Ventricular fibrillation

Answer: B

Explanation:

Tachycardia induced cardiomyopathy (TIC) is defined as systolic and/or diastolic ventricular dysfunction resulting from a prolonged elevated heart rate which is reversible upon control of the arrhythmia or the heart rate.
It is a rate dependent cardiomyopathy and those patients with higher tachycardia rates develop TIC earlier.
Abnormal calcium handling, reduced cellular energy storing, and abnormal energy use have been proposed as the underlying mechanisms responsible for this syndrome.
Pathologic changes start as early as 24-48 hours after onset of tachyarrhythmia in experimental models.
Most common cause is supraventricular tachycardia and of them most common sustained tachycardia is atrial fibrillation.

ECG Spotter

What is the diagnosis? Click the button below to view answer: Show Answer

Cardiology MCQ Q. Which of the following leads is not an inferior lead in ECG? A. Lead II B. Lead III C. Lead aVF D. Lead aVR Click the button below to view answer Show answer Correct answer is option D. Lead aVR

ST segment and T wave changes

What is the cause of ST changes and T wave inversions in this ECG? Should the patient be taken to Cath lab for coronary angiography? Show Answer These ST segment and T wave changes are secondary to left ventricular hypertrophy. There are classical features of left ventricular hypertrophy in this ECG which should not be missed. Hence, if the patient doesn't have any other features which suggest ischemia, then he should undergo evaluation for cause of left ventricular hypertrophy. The most common cause for left ventricular hypertrophy is hypertension.

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