A regular rhythm with narrow QRS complexes,indistinguishable P waves,and a heart rate of 155 would be consistent with
A)atrial fibrillation.
B)supraventricular tachycardia.
C)sinus bradycardia.
D)ventricular tachycardia.

Question

Quizplus · Accepted Answer

A regular rhythm with narrow QRS complexes and a heart rate of 155 suggests a supraventricular origin. The indistinguishable P waves may be due to their being buried within the QRS complexes or occurring very close to them, which is typical of supraventricular tachycardia. Atrial fibrillation would have an irregular rhythm and no discernible P waves. Sinus bradycardia would have a heart rate less than 60 bpm. Ventricular tachycardia would have wider QRS complexes.

A Regular Rhythm with Narrow QRS Complexes,indistinguishable P Waves,and a Heart