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Question
In the cardiac conduction system, least conduction velocity is seen in:
In the cardiac conduction system, least conduction velocity is seen in:
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Solution
The correct option is A AV node
The cardiac conduction system is a group of specialised cardiac muscle cells in the walls of the heart that send signals to the heart muscle causing it to contract.
The main components of the cardiac conduction system are the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers
The AV node serves as an electrical relay station, slowing the electrical current sent by the sinoatrial (SA) node before the signal is permitted to pass down through to the ventricles.
It is slowest in the AV node (seen as the PR interval on the ECG) allowing time for ventricular filling before ventricular contraction. If conduction velocity through the AV node is increased, ventricular filling may be compromised.
Conduction velocity is fastest in the Purkinje system.
The cardiac conduction system is a group of specialised cardiac muscle cells in the walls of the heart that send signals to the heart muscle causing it to contract.
The main components of the cardiac conduction system are the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers
The AV node serves as an electrical relay station, slowing the electrical current sent by the sinoatrial (SA) node before the signal is permitted to pass down through to the ventricles.
It is slowest in the AV node (seen as the PR interval on the ECG) allowing time for ventricular filling before ventricular contraction. If conduction velocity through the AV node is increased, ventricular filling may be compromised.
Conduction velocity is fastest in the Purkinje system.
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