Determine the impact if the connection between the sinoatrial (SA)node and the atrioventricular (AV)node becomes blocked.
A)The ventricles will contract more slowly.
B)The ventricular rhythm will not change.
C)The ventricles will contract more quickly.
D)The atria will contract more forcefully.

Question

Quizplus · Accepted Answer

The connection between the SA node and AV node is responsible for the coordinated contraction of the atria and ventricles. If this connection becomes blocked, the ventricles will rely on their own intrinsic pacemaker cells, which are slower than the SA node. This will lead to a slower ventricular contraction and potentially decreased cardiac output. Option B is incorrect because the ventricular rhythm will be affected by the block. Option C is incorrect because the ventricles will contract more slowly, not more quickly. Option D is incorrect because the atrial contraction is not directly affected by the block.

Determine the Impact If the Connection Between the Sinoatrial (SA)node