Author Question: Calculate the left ventricular stroke work for a patient with a body surface area of 1.1 m2, blood ... (Read 75 times)

imowrer · **on:** Jul 16, 2018

Calculate the left ventricular stroke work for a patient with a body surface area of 1.1 m2, blood pressure 105/68 mm Hg, heart rate 86 beats per minute, and cardiac output of 4.3 L/min.

a. 10.9 g-m/m2
b. 35.6 g-m/m2
c. 49.5 g-m/m2
d. 54.4 g-m/m2

Question 2

The following hemodynamic measurements were obtained from a patient in the intensive care unit: pulmonary artery pressure (PAP) = 67/25 mm Hg, pulmonary artery occlusion pressure (PAOP) = 18 mm Hg,

blood pressure (BP) = 100/50 mm Hg, central venous pressure (CVP) = 17 mm Hg, cardiac out-put (C.O.) = 5.7 L/min, and heart rate (HR) = 75 beats/min. Calculate this patient's pulmonary vascular resistance (PVR).
a. 295 dyne sec cm5
b. 393 dyne sec cm5
c. 800 dyne sec cm5
d. 1165 dyne sec cm5

leahchrapun · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Left ventricular stroke work (LVSW) = (MAP SV) 0.0136/BSA, MAP = Systolic BP + 2 (Diastolic BP)/3, SV = C.O./HR

Answer to Question 2

ANS: A
PVR = (MPAP MLAP)/PBF 80