ATI LPN
Cardiovascular Disease Questions Questions
Question 1 of 5
Which wave in an electrocardiogram represents repolarization of the ventricles?
Correct Answer: B
Rationale: The T wave on an ECG represents ventricular repolarization, preparing the ventricles for the next cycle of depolarization and contraction.
Question 2 of 5
The left atrioventricular valve is also called:
Correct Answer: D
Rationale: The left AV valve is known as both the mitral and bicuspid valve.
Question 3 of 5
Chordae tendineae are associated with which structure(s)?
Correct Answer: D
Rationale: Chordae tendineae are fibrous cords that connect the papillary muscles to the atrioventricular valve leaflets, supporting both the mitral and tricuspid valves.
Question 4 of 5
The first heart sound heard, or the 'lub' sound, is caused by the:
Correct Answer: A
Rationale: The first heart sound is caused by the closure of the AV valves during ventricular contraction.
Question 5 of 5
Which part of the heart conduction system is referred to as the pacemaker?
Correct Answer: B
Rationale: The sinoatrial (SA) node is known as the pacemaker because it initiates the electrical impulses that set the heart rate.