mechanics Flashcards
pressures and volumes: define and state normal values for intra-cardiac pressures and volumes
typical end-diastolic volume
108mL
typical end-systolic volume
36mL
typical stroke volume
72mL
patterns of pressure changes: right side vs. left side
right side essentially identical to left side (same volume, lower pressure)
normal systemic circuit pressure
120/80 mmHg
normal pulmonary circuit pressure
25/5 mmHg
define pulmonary capillary wedge pressure
pressure measured by wedging a pulmonary catheter with an inflated balloon into a small pulmonary arterial branch, estimating left atrial pressure
define end-diastolic volume
final volume of blood in ventricles just before they contract (occurs in isovolumetric contraction)
define end-systolic volume
residual volume of blood in ventricles following contraction
how to calculate stroke volume
end-diastolic volume - end-systolic volume
normal pulse pressure
40
normal MAP
93
normal atrial pressure
<30
