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