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Hemodynamics CCRN Questions and Correct Answers | Latest Update
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Cardiac output equation -:- CO = HR x SV Components of stroke volume -:- Preload Afterload Contractility Preload components -:- CVP (right ventricular) - central venous pressure PAOP (left ventricular) - pulmonary artery occlusive pressure Afterload components -:- PVR (right ventric...

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  • September 19, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • hemodynamics ccrn questions and correct answers
  • cardiac output equation co hr x sv compone

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  • Hematology CSMLS
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2024 /2025 | © copyright | This work may not be copied for profit gain Excel!




Hemodynamics CCRN Questions and Correct
Answers | Latest Update
Cardiac output equation


✓ -:- CO = HR x SV




Components of stroke volume


✓ -:- Preload

✓ Afterload

✓ Contractility




Preload components


✓ -:- CVP (right ventricular) - central venous pressure

PAOP (left ventricular) - pulmonary artery occlusive pressure




Afterload components


✓ -:- PVR (right ventricular) - pulmonary vascular resistance

SVR (left ventricular) - systemic vascular resistance




1|P a g e | G r a d e A + | 2 0 2 0 2 5

,2024 /2025 | © copyright | This work may not be copied for profit gain Excel!



Normal cardiac output


✓ -:- 4-8L/min




CI


✓ -:- -Cardiac index

-take into account body surface area and is a more meaningful value than CO




Normal cardiac index (CI)


✓ -:- 2.5-4.0L/min/m2




CO and HR


✓ -:- -As heart rate increases

-Cardiac output increases up to a point


-Extreme bradycardia results in low CO and hypotension


-Increase in HR >> first sign of compensation for a low CO




Definition of stroke volume



2|P a g e | G r a d e A + | 2 0 2 0 2 5

, 2024 /2025 | © copyright | This work may not be copied for profit gain Excel!



✓ -:- -How many mL pr beat the left ventricle ejects




Stroke Volume and CO


✓ -:- -As stroke volume increases, cardiac output increases




Normal SV (stroke volume)


✓ -:- 50-100 mL per beat




Define preload


✓ -:- -Preload is the volume/pressure in the ventricle at the end of

DIASTOLE after the AV valves close, just prior to ejection

-As preload increases, SV and CO will increase up to a point


-Too high of a preload may lead to heart failure


-Preload will seldom be elevate if the heart is without disease and there are no metabolic

abnormalities




What pressures reflect the right ventricle preload?


✓ -:- -Right atrial (RA)

3|P a g e | G r a d e A + | 2 0 2 0 2 5

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