On inspection of an ECG rhythm strip from an adult patient, you note the following: rate of 80/min; regular rhythm; normal P waves; P-R interval of 0.25 sec; normal QRS complexes. The most likely problem is:

A. 1st degree heart block
B. atrial fibrillation
C. 2nd degree heart block
D. 3rd degree heart block

Ans: A. 1st degree heart block

Health Professions

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