ATI RN
Cardiovascular System Assessment Questions Questions
Question 1 of 5
List the sections of the aorta beginning with the section that leaves the heart.
Correct Answer: B
Rationale: The aorta’s sections from the heart are: ascending aorta, aortic arch, descending aorta (B). A, C, D misorder the sequence.
Question 2 of 5
The instrument used to measure blood pressure is known as:
Correct Answer: D
Rationale: A sphygmomanometer (D) measures blood pressure using a cuff and gauge. ECG (A) records heart electrical activity, barometer (B) atmospheric pressure, and manometer (C) general pressure.
Question 3 of 5
Parasympathetic stimulation of heart causes:
Correct Answer: A
Rationale: Parasympathetic (vagal) stimulation slows the SA node (A), reducing heart rate (bradycardia). B, C, and D are sympathetic effects.
Question 4 of 5
Conduction velocity is least in:
Correct Answer: A
Rationale: The AV node (A) has the slowest conduction (~0.05 m/s) to delay the signal. SA node (B) initiates, Purkinje (C, ~4 m/s) and Bundle of His (D, ~1 m/s) are faster.
Question 5 of 5
The hemoglobin oxygen saturation of blood entering the right atrium is about:
Correct Answer: C
Rationale: Venous blood in the right atrium has ~75% O₂ saturation (C, SvO₂) after systemic use (~25% extracted). A, B, and D underestimate normal values.