Hemodynamics CCRN Exam Questions With
Correct Answers
Cardiac |output |equation |- |CORRECT |ANSWER✔✔-CO |= |HR |x |SV
Components |of |stroke |volume |- |CORRECT |ANSWER✔✔-Preload
Afterload
Contractility
Preload |components |- |CORRECT |ANSWER✔✔-CVP |(right |ventricular) |- |central |venous |pressure
PAOP |(left |ventricular) |- |pulmonary |artery |occlusive |pressure
Afterload |components |- |CORRECT |ANSWER✔✔-PVR |(right |ventricular) |- |pulmonary |vascular |
resistance
SVR |(left |ventricular) |- |systemic |vascular |resistance
Normal |cardiac |output |- |CORRECT |ANSWER✔✔-4-8L/min
CI |- |CORRECT |ANSWER✔✔--Cardiac |index
-take |into |account |body |surface |area |and |is |a |more |meaningful |value |than |CO
Normal |cardiac |index |(CI) |- |CORRECT |ANSWER✔✔-2.5-4.0L/min/m2
CO |and |HR |- |CORRECT |ANSWER✔✔--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 |- |CORRECT |ANSWER✔✔--How |many |mL |pr |beat |the |left |ventricle |
ejects
Stroke |Volume |and |CO |- |CORRECT |ANSWER✔✔--As |stroke |volume |increases, |cardiac |output |
increases
Normal |SV |(stroke |volume) |- |CORRECT |ANSWER✔✔-50-100 |mL |per |beat
Define |preload |- |CORRECT |ANSWER✔✔--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? |- |CORRECT |ANSWER✔✔--Right |atrial |(RA)
-Central |venous |pressure |(CVP)
What |pressure |reflects |the |left |ventricle |preload? |- |CORRECT |ANSWER✔✔--Pulmonary |artery |
wedge |pressure |(PAOP)
Define |afterload |- |CORRECT |ANSWER✔✔--Afterload |is |the |pressure |(resistance) |against |which |
the |ventricle |must |pump |to |open |the |valve |(pulmonic |and |aortic)
Correct Answers
Cardiac |output |equation |- |CORRECT |ANSWER✔✔-CO |= |HR |x |SV
Components |of |stroke |volume |- |CORRECT |ANSWER✔✔-Preload
Afterload
Contractility
Preload |components |- |CORRECT |ANSWER✔✔-CVP |(right |ventricular) |- |central |venous |pressure
PAOP |(left |ventricular) |- |pulmonary |artery |occlusive |pressure
Afterload |components |- |CORRECT |ANSWER✔✔-PVR |(right |ventricular) |- |pulmonary |vascular |
resistance
SVR |(left |ventricular) |- |systemic |vascular |resistance
Normal |cardiac |output |- |CORRECT |ANSWER✔✔-4-8L/min
CI |- |CORRECT |ANSWER✔✔--Cardiac |index
-take |into |account |body |surface |area |and |is |a |more |meaningful |value |than |CO
Normal |cardiac |index |(CI) |- |CORRECT |ANSWER✔✔-2.5-4.0L/min/m2
CO |and |HR |- |CORRECT |ANSWER✔✔--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 |- |CORRECT |ANSWER✔✔--How |many |mL |pr |beat |the |left |ventricle |
ejects
Stroke |Volume |and |CO |- |CORRECT |ANSWER✔✔--As |stroke |volume |increases, |cardiac |output |
increases
Normal |SV |(stroke |volume) |- |CORRECT |ANSWER✔✔-50-100 |mL |per |beat
Define |preload |- |CORRECT |ANSWER✔✔--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? |- |CORRECT |ANSWER✔✔--Right |atrial |(RA)
-Central |venous |pressure |(CVP)
What |pressure |reflects |the |left |ventricle |preload? |- |CORRECT |ANSWER✔✔--Pulmonary |artery |
wedge |pressure |(PAOP)
Define |afterload |- |CORRECT |ANSWER✔✔--Afterload |is |the |pressure |(resistance) |against |which |
the |ventricle |must |pump |to |open |the |valve |(pulmonic |and |aortic)
