A recording of the electrical activity of a patient’s heart shows that the atria are contracting regularly and normally, but every few beats the ventricles fail to contract. Which of the following is probably not functioning properly?
A. AV node
B. Semilunar valve
C. SA node
D. AV valve
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A heart attack patient is suffering blockage in the coronary arteries that branched into arteries supplying the blood to AV node. What is the effect of this blockage the patient’s heart?
A. The AV node caused a prolonged delay in generating impulse.
B. The AV node generate impulse without any delay after SA node.
C. The Ventricles will contract more frequently in each cardiac cycle
D. The atrium will contract slower than normal.
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