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WVSOM -- Physio
Systemic Circulation
Question | Answer |
---|---|
Pulse Pressure | systolic - diastolic |
Current = | Voltage/resistance |
TPR | total peripheral resistance |
Q= | Arterial Pressure / TPR |
MAP | Mean Arterial Pressure |
MAP = | Diastolic + 1/3(PP) CO X TPR |
SV = | EDV-ESV |
CO = | SV X HR |
80% of total BV is in the ___________ | systemic circulation |
Most of the blood in the systemic circulation is in the | veins |
Central BV contains _____% of total BV | ~20-25 |
Central BV is | Central vena cava Intrathoracic portions of the inferior vena cava Right atrium and ventricle pulmonary circulation left atrium |
CVP | central venous pressure |
2 ways to alter CBV | increase or decrease the total BV OR redistribute the BV you have |
MSFP | mean circulatory filling pressure |
Venous return must equal | cardiac output |
Right atrial pressure depends on | Cardiac Output and Venous return |
Venous return determines | Right Atrial Pressure |
Right Atrial Pressure determines | Venous Return and Cardiac Output |
Things that shift teh vascular curve up and down are | blood volume and venous tone |
What happens to MCFP when there is more BV or an increase in VT? | increase |
Things that can change MCFP | SNS tone blood volume contraction of skeletal muscle |
Increasing arteriolar resistance __________ venous return | increases |
Cardiac function curve plots cardiac function as a functino of | RAP or CVP |
Increased TPR effect on cardiac function and venous return curves | Vasoconstriction Lowers CO May shift both cardiac function and venous return curves |
Heart Failure effect on the venous return and cardiac function curve | Cardiac function goes down and then Venous Return goes up to compensate |