, Cardiac Dysrhythmias Advanced 2024
Exam Review Questions and Answers
100% Pass | Graded A+
What is the pacemaker of the heart normally? - Answer>> SA
Node.
Where does the SA node originate? - Answer>> Upper right
atrium.
What is the pathway of conduction in the heart? - Answer>> SA
node -> atria -> AV node -> bundle of his -> bundle branches ->
purkinje fibers -> ventricles.
What does stimulation of the vagus nerve cause? - Answer>>
Decreased firing of the SA node and slowed impulse conduction
of the AV node.
What does stimulation of the sympathetic nerves cause? -
Answer>> Increased firing of the SA node and increased
impulse through the AV node, and cardiac contractility.
What does the P wave represent? - Answer>> Time for the
passage of the electrical impulse through the atrium causing atrial
depolarization (contraction).
What is the normal P wave duration? - Answer>> 0.06 - 0.12.
What is a possible variation cause of a P wave? - Answer>>
Disturbance in conduction within the atria.
What does the PR interval represent? - Answer>> The measure
from the beginning of the P wave to the beginning of the QRS
complex, represents time taken for impulse to spread through the
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