ATI LPN
Cardiovascular NCLEX Questions with Rationale Questions
Question 1 of 5
According to the Frank-Starling law, stroke volume increases as a function of:
Correct Answer: C
Rationale: Frank-Starling law states that the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart (the end diastolic volume) when all other factors remain constant.
Question 2 of 5
If the Purkinje fibers, situated distal to the AV junction, become the pacemaker of the heart, what is the expected heart rate?
Correct Answer: A
Rationale: Purkinje fibers as pacemakers produce a rate of 20-40 beats/min, with 30/min being typical.
Question 3 of 5
Which of the following substances in plasma is the major factor that contributes to plasma colloid osmotic pressure?
Correct Answer: C
Rationale: Albumin is the primary contributor to plasma colloid osmotic pressure due to its abundance and size.
Question 4 of 5
A 75-year-old male goes to the hospital ER and faints. Five minutes later he is alert. An ECG shows 75 P-waves per minute and 35 QRS complexes per minute with normal QRS width. Which of the following is the most likely diagnosis?
Correct Answer: B
Rationale: Stokes-Adams syndrome involves transient complete heart block, causing fainting with a slow ventricular rate.
Question 5 of 5
Which is correct regarding HDL?
Correct Answer: C
Rationale: HDL removes cholesterol from tissues and delivers it to the liver, aiding reverse cholesterol transport.