Term
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Definition
| The tension in the ventricular wall at the end of diastole. In the intact heart, preload results from the stretching of muscle fibers by the volume of blood contained within the ventricle at the end of diastole. |
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Term
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Definition
| The resistance that the ventricle has to overcome in order to eject blood into the vasculature. The intraventricular or arterial pressure during systole is used as an index of afterload. |
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Term
| Define contractility (inotropy0. |
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Definition
| Contractility or inotropy is the propery of the myocardium that accounts for changes in the strength of contraction when preload and afterload are unchanged. |
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Term
| Define stroke volume (SV). |
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Definition
| Stroke volume is the volume of blood ejected from the ventricle during systole. |
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Term
| Define ejection fraction. |
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Definition
| The percent of the end-diastolic volume that is ejected from the ventricle during systole. |
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Term
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Definition
| The volume of blood ejected by the ventricle per minute. |
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Term
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Definition
| Compliane is change in volume divided by change in pressure. If describes the ability of a chamber to accommodate a volume. |
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Term
| What is the Frank-Starling Law? |
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Definition
| The Frank-Starling law states that the force of ventricular ejection is proportional to the length of the muscle fibers. |
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