ANATOMY
LIMB VASCULATURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Select the correct pairing of the node with it’s BPM
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SA Node 70-80
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AV Node 40-70
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Purkinje Fibers 15-40
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AV Node 40-60
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SA Node 70-90
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Explanation:
Detailed explanation-1: -The SA node is the pacemaker of the heart and has an intrinsic rate of 60 – 100 bpm. If the SA node does not fire, the next pacemaker in hierarchical order is the AV node. This intrinsic rate of the AV node is 40 – 60 bpm.
Detailed explanation-2: -The AV node slows the impulses from the SA node, firing at a normal rate of 40-60 bpm, and causes depolarization of the ventricular muscle tissue and ventricular contraction. Sympathetic nervous stimulation increases the heart rate, while parasympathetic nervous stimulation decreases the heart rate.
Detailed explanation-3: -The intrinsic rate of the AV node is 40 to 60 beats per minute (bpm).
There is 1 question to complete.