Which is the normal sequence of the spread of cardiac excitation?
1)AV node
2)SA node
3)atria
4)Purkinje fibers
5)bundle of His
6)ventricular myocardium
A)2-3-1-5-4-6
B)3-2-1-4-5-6
C)2-3-1-4-5-6
D)1-2-3-4-5-6
E)none of these

Question

Quizplus · Accepted Answer

The normal sequence of cardiac excitation starts at the SA node (2), spreads through the atria (3), reaches the AV node (1), travels down the bundle of His (5), spreads through the Purkinje fibers (4), and finally excites the ventricular myocardium (6).

Which Is the Normal Sequence of the Spread of Cardiac