Question

Case 1 – New data set: ABP = 90/60 mm Hg, HR 145 Beats/min, cardiac output = 3 l/min, CVP = 0 mm Hg, PAP = 30/10 mm Hg, PCWP = 2 mm Hg. Calculate the SV and fill in the table below and answer the question below.

Mean arterial pressure (MAP)	mmHg
Systemic vascular resistance (SVR)	dynes
Mean pulmonary artery pressure (PA mean)	mmHg
Pulmonary vascular resistance (PVR)	dynes
Stroke volume (SV)	ml

Regarding Case 1. The cardiac output is lower than normal primarily because:

afterload is increased

preload is decreased

contractility is decreased

rate is increased

Answer 1

Answer:- Given that, Case-1

ABP = 90/60 mm Hg, HR 145 Beats/min, cardiac output = 3 l/min, CVP = 0 mm Hg, PAP = 30/10 mm Hg, PCWP = 2 mm Hg,

Mean arterial pressure (MAP) = (2×diastolic+systolic) / 3

Pulmonary vascular resistance (PVR) = 80(PAP-PCWP)/cardiac output

Systemic vascular resistance (SVR) = 80(MAP-CVP)/cardiac output

Stroke volume (SV) = Heart rate * cardiac output

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