Which of the following sequences correctly depicts the normal pattern of sequential depolarization of the structures of the heart?
(1)right and left bundle branches
(2)sinoatrial (SA)node
(3)subendocardial Purkinje network
(4)bundle of His
(5)atrioventricular (AV)node

Question

Which of the following sequences correctly depicts the normal pattern of sequential depolarization of the structures of the heart? 
(1)right and left bundle branches
(2)sinoatrial (SA)node
(3)subendocardial Purkinje network
(4)bundle of His
(5)atrioventricular (AV)node

Quizplus · Accepted Answer

The normal pattern of sequential depolarization involves the structures of the heart in the following order: sinoatrial (SA)node,atrioventricular (AV)node,bundle of His,right and left bundle branches,subendocardial Purkinje network.The electrocardiogram (ECG)is a recording of this electrical activity.The primary anatomic pacemaker for the heart is the SA node,a crescent-shaped structure 9 to 15 mm long that is located at the junction of the superior vena cava and the right atrium.

Which of the Following Sequences Correctly Depicts the Normal Pattern