Term
| End diastolic volume (EDV) |
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Definition
| volume of blood in the ventricles at the end of diastole |
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Term
| End systolic volume (ESV) |
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Definition
| volume of blood in the ventricles after systole-after ejection is complete |
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Term
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Definition
| amount of blood pumped out of each ventricle w/each contraction; SV=EDV-ESV |
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Term
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Definition
| volume of blood pumped by each ventricle/min.; CO=HR X SV |
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Term
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Definition
| difference btw. max. CO and resting CO; depends on HR and SV (increase together) |
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Term
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Definition
| mechanism that affect the cardiac rate; increase HR (+) chrom. effect; decrease HR (-) chrom. effect |
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Term
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Definition
| rate set by SA node's rate of depolarization |
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Term
| Changing Stroke Volume-EDV |
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Definition
| increasing venous return will increase EDV |
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Term
| Changing Stroke Volume-contractility |
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Definition
| strength of contraction; Frank-Starling Law of the Heart (length/tension relationship of cardiac muscle) |
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Term
| Changing Stroke Volume-total peripheral resistance |
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Definition
increase BP->heart has to work harder; decrease SV
increasing the force of contraction will decrease ESV
increase venus return: increase EDV->increase SV
increase force of contraction: decrease ESV->increase SV |
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Term
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Definition
depends on total blood volume and venous pressure
increase VR->increase EDV->increase force of cont.->increase SV->decrease ESV-> increase CO |
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Term
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Definition
| 1 way valves; respiratory pump; skeletal pump; vasoconstriction |
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