Question:easy
Boot shape of heart in TOF is due to:
Boot shape of heart in TOF is due to:
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Upturned apex from a thick right ventricle gives the clog shape.
Updated On: Jun 23, 2026
- Left atrial enlargement
- Right atrial enlargement
- Right ventricular hypertrophy
- Biventricular hypertrophy
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The Correct Option is C
Solution and Explanation
Step 1: Link the X-ray to the pathology. In TOF, pulmonary stenosis forces the right ventricle to pump against high resistance, so its muscle wall thickens - right ventricular hypertrophy. Step 2: A hypertrophied right ventricle pushes the cardiac apex upward and outward, while the obstructed, underfilled pulmonary trunk leaves a concavity at the left heart border where the main pulmonary artery normally bulges. Step 3: The combination of an upturned apex and a scooped-out pulmonary bay gives the silhouette of a boot or wooden clog, the coeur en sabot. Step 4: The root cause of the upturned apex is the hypertrophied right ventricle, so the answer is right ventricular hypertrophy. \[\boxed{\text{Right ventricular hypertrophy}}\]
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