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. I calculated that MAP=70 mm Hg, SVR=1866.7 dynes, PA mea=16.7 mm HG, PVR=139.2 dynes, and SV=20.1 ml. I just need help with the conceptual questions: A. How would SV normally respond if venous return increases? (increase, decrease, or nothing) B. What would be the best treatment for the patient? (diuretics, aortic balloon pump, intravenous fluid admin, or vasoconstrictors) C. The cardiac output would be lower because... (afterload increases, preload decreases, contractility decreases, rate increases) D. What structures influence SVR in normal persons? (heart valves, arterioles, capillaries, or papillary muscles)
ANSWER
A. If the venous return increases filling of blood into the heart increases
which result in increase in stroke volume (SV).
B. Patient have low cardiac output due to increase in systemic vascular
resistance(1866.7 dynes) so best treatment option is intra aortic balloon
pump which help to decrease SVR by deflating the balloon during systole
which creates a dead space to effectively reduce afterload for myocardial
ejection.
C. Cardiac output would be lower because of the increase in afterload which
make more resistance against ventricles of heart to eject blood during systole.
D. In the case of normal person Arterioles influence SVR because if arterioles
tighten or constrict which result in increasing SVR.
Case 1- New data set: ABP: 90/60 mm Hg, HR 145 beats/min, cardiac output=3 l/min, CVP=0...
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...
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 best treatment...
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