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General Medicine · Cardiology
Sample itemWhat rhythm is characterized by an irregularly irregular pulse?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Atrial fibrillation
Atrial fibrillation produces chaotic atrial electrical activity and variable ventricular filling, resulting in a characteristically irregularly irregular pulse.
Option by option
A. Atrial fibrillation (correct)
Correct: atrial fibrillation classically produces an irregularly irregular rhythm.
B. Ventricular bigeminy only
Bigeminy has a repeating pattern rather than random irregularity.
C. Sinus rhythm
Sinus rhythm is regular with organized atrial activity.
D. Complete heart block
Complete heart block may be regular but dissociated.
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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