Question

Regarding the electrical conduction system of the heart; where does the most distal electrical conduction impulse occur?

Sinoatrial node
Purkinje fibers
Atrial ventricular node
Bundle of His

Answer 1

The most distal electrical conduction impulse occurs in the Purkinje fibers. Hence the correct answer is option B

Step-by-step explanation:

The most distal electrical conduction impulse in the heart occurs in the Purkinje fibers. These fibers are additional myocardial conductive fibers that spread the impulse to the myocardial contractile cells in the ventricles. They have a fast inherent conduction rate and allow the electrical impulse to reach all of the ventricular muscle cells in about 75 ms. This leads to the contraction of the ventricles and the pumping of blood out of the heart.

Hence the correct answer is option B