A) having 90% blockage of the three main coronary arteries
B) having a very high blood pressure
C) with irregularity in the heart rhythm
D) suffering from arteriosclerosis
Correct Answer: C
Solution :
SA node (Sinu-atrial node) initiate heart beats and thereby sets the basic pace of the heart beat, hence, its name pace maker. Pace maker is a bundle of modified cardiac muscles. An artificial pace maker is implanted subcutaneously and connected to the heart in patients with irregularity in the heart rhythm.
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