A chest trauma patient with an irregular pulse is most consistent with which diagnosis?

• A. Myocardial Infarction
• B. Cardiac Contusion
• C. Cardiac Tamponade
• D. Tension Pneumothorax

Answer: (B)

Blunt chest trauma can bruise the heart and disrupt its electrical system, so a cardiac contusion often presents with an irregular pulse due to arrhythmias or irritation of the conduction pathways. This makes it the most likely explanation in a trauma setting. Cardiac tamponade would usually show hypotension with jugular venous distention and muffled heart sounds, not just an irregular rhythm. Tension pneumothorax causes respiratory distress, unilateral breath sounds loss, and mediastinal shift rather than a rhythm disturbance being the primary clue. Myocardial infarction can cause arrhythmias too, but in the immediate post-trauma context, direct injury to the heart from the impact fits best.