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Related Flashcards
Cards In This Set
| Front | Back |
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Definition of Hemodynamics?
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The study of the physical aspects of blood flow
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Definition of Cardiac Output?
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Volume of blood ejected from heart / min
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Equation for Cardiac Output?
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HR x Stroke Volume
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Normal value for Cardiac Output?
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4-8 L / min
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Definition of Ejection Fraction?
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Fraction of blood ejected with each beat
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Normal value for Ejection Fraction?
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60 - 70% - from L. ventricle
(depends of metabolism & body's needs)
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Equation for Cardiac Index? normal value?
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CO / Body surface area (height & weight)
2.5- 4.2 L / min / m2
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Definition of Systemic Vascular Resistance (SVR)?
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Resistance that the LEFT ventricle must overcome to eject a volume of blood
(if SVR increases = CO decreases)
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What can SVR display? (3)
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1. Peripheral vascular resistance
2. Diameter of blood vessels
3. Indicative of LV afterload
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Normal value for SVR?
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770- 1500
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Definition of Stroke Volume?
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The amount of blood ejected by the left ventricle.
(dependent of preload, afterload & contractility)
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Normal value for Stroke Volume?
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60- 130 ml / beat
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Definition of Preload?
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Degree of muscle fibers STRETCH before systole
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What can Preload determine?
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The amount of blood in ventricle prior to contraction
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Left preload?
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PAOP (wedge) = 8-12 mm Hg
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