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Forensic Medicine · Injuries and wounds: blunt cardiac injury
Sample itemA driver hits the steering wheel and has sternal tenderness, new ventricular ectopics and a raised troponin. What is the most likely injury?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Myocardial contusion
A blow to the sternum can bruise the myocardium, commonly the right ventricle, causing arrhythmias and raised cardiac markers. Aortic transection causes mediastinal widening and pneumothorax causes absent breath sounds.
Option by option
A. Traumatic aortic transection
Aortic transection presents with shock and a widened mediastinum, not ectopics with local sternal pain.
B. Tension pneumothorax
Tension pneumothorax gives absent breath sounds and a shifted trachea.
C. Myocardial contusion (correct)
Correct. Arrhythmia and raised troponin after a steering wheel blow suggest myocardial contusion.
D. Pulmonary embolism
Pulmonary embolism is not caused directly by the blunt impact.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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