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

Peripartum Cardiomyopathy

Peripartum Cardiomyopathy (PPCM) • Usually develops in last month of pregnancy or first 5 months post-delivery. • Presents as heart failure with reduced ejection fraction (dilated cardiomyopathy) ↳ LV EF < 45% • PPCM is a diagnosis of exclusion. • Risk factors → 1- History of Hypertension, Pre-eclampsia 2- Black women • Incidence → 1 in 2000 live births. • Management → 1. Guideline directed medical therapy for HF- Beta-blockers Hydralazine plus isosorbide dinitrate Diuretics 2. Bromocriptine 3. Low threshold for anticoagulation 4. ...

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