Hemodynamics CCRN Questions and Answers well Explained Latest 2024/2025 Update 100% Correct.
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Course
Hemodynamics CCRN
Institution
Hemodynamics CCRN
Tx to decrease preload - -Diuretics
-Dilators (nitrates, nitroprusside, morphine)
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...
-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 - -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
What pressures reflect the right ventricle preload? - -Right atrial (RA)
-Central venous pressure (CVP)
What pressure reflects the left ventricle preload? - -Pulmonary artery wedge pressure (PAOP)
Define afterload - -Afterload is the pressure (resistance) against which the ventricle must pump to
open the valve (pulmonic and aortic)
How is afterload measured for the right ventricle? - -Pulmonary Vascular Resistance (PVR)
How is afterload measured for the left ventricle? - -Systemic Vascular Resistance (SVR)
Afterload and CO - -As afterload increases, SV and CO decrease
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