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6 Cards in this Set
- Front
- Back
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wall stress
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= r x P / 2h
along with O2, most relevant contributor to changes in myocardial O2 demand ellipsoid shape LV decreases wall stress (increases as becomes spherical) |
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Pulse pressure
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Difference bw systolic and diastolic pressures
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Factors influencing arterial pressure
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LV stroke volume
Distensibilty of aorta and large arteries Peripheral vascular resistance, particularly at arteriolar level Volume of blood in arterial system |
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Increased JVP indicative of:
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Right sided HF
Less commonly: Constrictive pericarditis Tricuspid stenosis SVC obstruction |
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arteriovenous oxygen difference
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difference in the oxygen content of the blood between the arterial blood and the venous blood
indication of how much O2 is removed from the blood in capillaries as the blood circulates in the body O2 blood measured at brachial, radial or femoral artery deO2 measured at pulm artery (typical mixed venous blood) at rest normally 5mL/100mL diff, increases with exercise up to 16mL/100mL (max even higher in trained athletes) |
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cyanosis determinants
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(1) arterial oxygen saturation,
(2) oxygen capacity (hemoglobin), and (3) arteriovenous oxygen difference Cyanosis will be noted if the arterial oxygen saturation is low, if the oxygen capacity is high, or if the arteriovenous difference is increased |
