ATI LPN
Cardiovascular Disease Questions Questions
Question 1 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.
Question 2 of 5
Which of the following does NOT open into the right atrium?
Correct Answer: C
Rationale: The pulmonary orifice connects the right ventricle to the pulmonary artery, not the right atrium, unlike the other structures listed.
Question 3 of 5
The internal elastic lamina found in elastic arteries is:
Correct Answer: A
Rationale: The internal elastic lamina is prominent in elastic arteries, aiding in their flexibility and recoil.
Question 4 of 5
Which of the following is associated with the 3rd heart sound?
Correct Answer: D
Rationale: The 3rd heart sound (S3) occurs due to rapid ventricular filling in early to mid-diastole.
Question 5 of 5
A 70-year-old male had a following ECG during his annual physical examination. What is the expected duration of Q-T interval?
Correct Answer: C
Rationale: The normal QT interval is approximately 0.35-0.44 seconds, with 0.40 sec being a typical value.