PCCN Exam Questions and Answers

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PCCN Exam Questions and Answers (Verified Answers)

1.What is the function of the cardiovascular system: to drive O2 to the

cell so that the cell can make ATP for energy production

2.What is the formula for CARDIAC OUTPUT: Stroke volume x Heart Rate

CO = HR X SV ( Preload + Afterload + Contractility) 3.What is the term for the amount of blood that is pumped out of the ventricle each MINUTE (Answer) Cardiac Output ( approximately 4 - 8 LPM ) 4.What is the term for the amount of blood that is pumped out of the ventricle each BEAT (Answer) Stroke Volume 5.What is the term for the number of contractions / minute (Answer) Heart Rate 1 / 3

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6.IMPORTANT RELATIONSHIPS TO KNOW: 1. CO DECREASED -> HR

IN- CREASES ( to maintain adequate stroke volume ) 2.CO INCREASED -> HR DECREASES ( as stroke volume decreases ) 3.HR DECREASED -> SV DECREASES and CO DECREASES 4.HR INCREASES ( > 150 ) -> SV DECREASES and CO DECREASES 5.SV DECREASES -> CO DECREASES and HR INCREASES 6.SV INCREASES -> CO INCREASES and HR DECREASES 7.What is the term for the volume of blood ejected from the ventricle

per minute adjusted for body size: Cardiac Index

8.What is a normal cardiac index (Answer) Normal = 2.5 to 4.4 L/min/m2 **Always utilize CI values on exam (especially for bigger patients) 9.What is a normal amount (mL/beat) for stroke volume (Answer) 60 to 100 Ml 2 / 3

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10.What is the term for the end-diastolic volume stretching the ventricle (Answer) - Preload

• increased fluid = increased stroke volume )

11.What is the term for the pressure that the ventricle must OVERCOME in order to eject blood into the circulatory system (Answer) Afterload

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