Least conduction velocity is seen in:
A. AV node
B. Purkinje fibers
C. Bundle of his
D. Ventricular myocardial fibers
A. AV node
B. Purkinje fibers
C. Bundle of his
D. Ventricular myocardial fibers
Ans. D
Conduction rate
in decreasing order:
Purkinje fibers > Bundle of His = Ventricular
muscle = Atrial pathway > SA node > AV node
|
Tissue
|
Conduction rate (m/s)
|
Relative value
|
|
SA node
|
0.05
|
2nd least
|
|
Atrial
pathway
|
1
|
|
|
AV node
|
0.02
– 0.05
|
Least
|
|
Bundle
of His
|
1
|
|
|
Purkinje system
|
4
|
Highest
|
|
Ventricular
muscle
|
1
|
|
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