Physiology Flashcards
1
Q
RV stroke work index equation. What value indicates good RV function.
A
RVSWI = (mean PA - CVP) x (CI/HR)
RVSWI > 0.3 predicts satisfactory RV function after LVAD support
2
Q
Transpulmonary gradient (TPG) equation
A
TPG = Mean PA - PCWP (left atria)
3
Q
Max transpulmonary gradient (TPG) for heart transplant
A
15 mmHg
4
Q
Treatment to decrease transpulmonary gradient (TPG)
A
LVAD therapy. It can dec TPG in over 6 months. Helps make inoperable patients operable. If TPG remains elevated after 6 months, list for heart-lung transplant.
5
Q
Pulmonary vascular resistance equation
A
PVR = TPG / CO
6
Q
Max pulm vasc resistance (PVR) for heart transplant
A
4 wood units
7
Q
At what value of PVR (in wood units) has a high rate of RV failure s/p LVAD
A
> 4.3 Wood units
