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13-08-2019
Biology

contestada

First-degree heart block is characterized by
a. prolonged PR interval.
b. absent P waves.
c. variable PR interval.
d. widened QRS complex.

Respuesta :

euden57 euden57

13-08-2019

Answer:

The answer is A. Prolonged PR interval.

Explanation:

First-degree heart block is characterized by prolonged PR interval. First-degree A-V blockages occur when electrical impulses that move through the atrioventricular node are delayed, but not obstructed. It presents with a slow conduction and without lost beats.

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