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15 Cards in this Set
- Front
- Back
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What artery goes to the SA node and Av junction
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Right coronary artery
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What artery goes to the septal wall, left ventricle, and papillary?
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Left coronary artery
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What does the papillary muscle control?
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Valve of the heart
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What does the left anterior descending do? What is it know as? If its blocked what does this mean?
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feeds the anterior wall, apex,and bundle branches. Know as the "widow maker". blocked means heart damage.
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Where is the widow maker located and what is its main purpose?
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covers the left ventricle and apex of the heart- its main purpose is pumping action.
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What is the conduction system?
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how the heart initiates a beat
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Where does the impulse start? What is it also known as? what is its normal beat?
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SA node, pace maker, beat 60-100/min
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AV node is know as what? regular beat?
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Atrial ventricular junction- protective mech. that blocks impulses to slow things down. 40-60/min
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Bundle of his rhythum
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<40/min
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Purkinje fibers does what
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tells the ventricle to contract, if nothing else working beat about 15/min
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What determines circulation of the heart?
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Cardiac output
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What is the normal CO?
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4-6L/min
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How is CO measured?
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CO=HRxSV
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What is preload?
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left ventricular before the contraction, the volume there stretches out"starling law" pushes blood out
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What is afterload?
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amount of pressure we have to push against to get blood out of the heart after the contraction. Its the resting phade of the ventricles.
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