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Cardiology
Cardiophysiology
Question | Answer |
---|---|
highest resistant in CVS | arterioles |
largest total cross-sectional and surface area | capillaries |
veins | under low pressure; high portion of blood |
arteries | deliver oxygenate blood to tissues; high pressure; stressed volume |
Systolic pressure | hightest arterial pressure during cardiac cycle; measured after heart contracts and blood ejected into arterial system |
Diastolic pressure | lowest arterial pressure during a cardiac cycle; measured when Heart is relaxed and blood is returning to the heart via veins |
Pulse Pressure | determinant of Stroke Volume |
what can cause increase in PP | aging |
Pulse pressure calculations | systolic - diastolic |
arterial pressure is measurement of | Left arterial pressure [PCWP] |
Ejection fraction measured | Stroke volume / EDV |
what is normal EF | 55% |
Preload measured by | EDV and RA pressure |
Afterload measured by | LV = aortic pressure : increase in aortic pressure = Increase in afterload of LV RV = pulmonary artery pressure; increase in pulmonary artery pressure causes increase in afterload in RV |
what increases preload | venous dilaters |
what decreases afterload | vasodilators |