PCCN Exam 2023 Questions with Correct Answers | 100% Guaranteed Pass.

PCCN Exam 2023 Questions with Correct Answers | 100% Guaranteed Pass. PCCN Exam 2023 Questions with Correct Answers What is the function of the cardiovascular system to drive O2 to the cell so that the cell can make ATP for energy production What is the formula for CARDIAC OUTPUT Stroke volume x Heart Rate CO = HR X SV ( Preload + Afterload + Contractility) What is the term for the amount of blood that is pumped out of the ventricle each MINUTE? Cardiac Output ( approximately 4 - 8 LPM ) What is the term for the amount of blood that is pumped out of the ventricle each BEAT? Stroke Volume What is the term for the number of contractions / minute? Heart Rate IMPORTANT RELATIONSHIPS TO KNOW 1. CO DECREASED -> HR INCREASES ( 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 What is the term for the volume of blood ejected from the ventricle per minute adjusted for body size Cardiac Index What is a normal cardiac index? Normal = 2.5 to 4.4 L/min/m2 **Always utilize CI values on exam (especially for bigger patients) What is a normal amount (mL/beat) for stroke volume? 60 to 100 mL What is the term for the end-diastolic volume stretching the ventricle? Preload ( increased fluid = increased stroke volume ) What is the term for the pressure that the ventricle must OVERCOME in order to eject blood into the circulatory system? Afterload What is the term for the inotropic state the cardiac muscle Contractility (how well the heart is contracted) Preload is the function of which part of the circulatory system? VEINS FUNCTION OF VEINS = PRELOAD What is the RIGHT VENTRICLE PRELOAD assessed by? CVP (Central venous pressure) (Normal is approx. 2 - 8 mmhg) What is a normal central venous pressure ? Approximately 2 - 8 mmhg What is the LEFT VENTRICLE PRELOAD assessed by? PAOP (Pulmonary artery occlusion pressure) / PAW pulmonary artery wedge pressure -Swans ganns in placed wedge pressure (PA) What are the signs and symptoms of an altered preload? 1. Dehydration (decreased preload) 2. Fluid overload (increased preload) What are some causes of a low preload? 1. Hemorrhage 2. Dehydration 3. Burns 4. Over-diuresis 5. Third spacing (fluid moving into spaces they shouldn't be) What are some causes of high preload? 1. Hypervolemia 2. Heart failure 3. Renal failure 4. Pulmonary HTN 5. Tamponade 6. Tension pneumothorax (most likely seen in right ventricle preload) What are the venous dilating drugs? 1. NITRO (given to drop preload) 2. ACE I/ARB 3. Ca-Channel blocker Which venous dilating drug is given to drop the preload amount? Nitro .