mechanics Flashcards
law of Laplace (cardiac): recall and explain the relationship of the law of Laplace to cardiac mechanics
1
Q
define law of LaPlace
A
when pressure within cylinder is constant, tension on its walls increases with increasing radius
2
Q
law of LaPlace calculation: pressure and radius
A
wall tension = vessel pressure x vessel radius
3
Q
law of LaPlace calculation: incoroprating wall thickness (h)
A
T = (P x R) / h
4
Q
why is the radius of curvature of left ventricular walls less than that of right ventricular walls
A
allow it to generate higher pressures with similar wall tension
5
Q
radius of curvature in heart failure
A
more dilated so increase in wall stress as pressure remains same
