The nurse is reviewing normal cardiac conduction with a new graduate nurse. What will the nurse teach when the impulse reaches the bundle of His? Note: Credit will be given only if all correct choices and no incorrect choices are selected
Select all that apply. 1. Conduction of the impulse penetrates the atrioventricular valves.
2. Conduction of the impulse bifurcates into the right and left bundle branches.
3. Conduction of the impulse continues to the Purkinje fibers.
4. Conduction of the impulse is slowed because of calcium ions.
5. Conduction creates a flat line after the P wave on the ECG rhythm.
1,2,3
Rationale 1: Once the impulse reaches the bundle of His, the impulse penetrates the AV valves.
Rationale 2: Once the impulse reaches the bundle of His and penetrates the AV valves, the impulse bifurcates into the right and left bundle branches.
Rationale 3: Once the impulse reaches the bundle of His and penetrates the AV valves, the impulse bifurcates into the right and left bundle branches and continues until it reaches the Purkinje fibers.
Rationale 4: A slowing of the conduction because of calcium ions occurs when the impulse is moving through the atrioventricular node.
Rationale 5: A flat line after the P wave on the ECG rhythm occurs when the impulse travels through the atrioventricular node.
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