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25 Cards in this Set
- Front
- Back
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This is to see how the heart is functioning. It mainly records how often beats (heart rate) and how regularly it beats ( heart ryhthm). |
electrocardiogram (ecg) |
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This cardiac phase occurs when the heart contracts to pump blood out |
systole |
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This cardiac phase occurs when the heart relaxes after contraction. |
diastole |
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what are the cardiac cycle phases? |
atrial diastole atrial systole isovolumic contraction ventricular eejction isovolumic relaxation ventricular filling stage |
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in thsi stage, chambers of the heart are calmed. that is whe the aortic valve and pulmonary artery closes and atrioventricular valves open, thus causing chambers of the heart to relax. |
atrial diastole |
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at this phase, blood cells flow from atrium to ventricle and at this period, atrium contracts. |
atrial systole |
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at this stage, ventricles begin to contract. the atrioventricular valves, valve, and pulmonary artery valves close, but there won't be any transformation in volume. |
isovolumic contraction |
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at this stage, ventricles contract and emptying. pulmonary artery and aortic valve close. |
ventricular ejection |
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in this phase, no blood enters the ventricles and consequently, pressure decreases, ventricles stop contracting and begin to relax. now due to the pressure in the aorta- pulmonary artery and aortic valve close. |
isovolumic relaxation |
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in this stage, blood flows from atria into the ventricles. it's altogether known as one stage (first an second stage). after that, they are three phases that involve the flow of blood to the pulmonary artery from ventricles. |
ventricular filling stage |
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The period when the heart chambers contract that causes the ejection of blood into the aorta an pulmonary trunk. |
systole |
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the part of the cardiac cycle during which the heart refills blood after it is emptied during the systolic phase. |
diastole |
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this refers to basic measures of cardiovascular function, such as arterial pressure or cardiac output. |
hemodynamics |
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in a normal person, a heartbeat is |
72 beats/minute |
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this refers to the volume of blood pumped out per ventricle per minute. |
cardiac output |
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the amount of blood pumped by the left ventricle in one compression is called the ___________ |
stroke volume |
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it refers to the number of times the heart beats pe minute (bpm) |
heart rate |
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factors determining cardiac output: |
venous return force of contraction heart rate |
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this is the amount of blood that enters the heart through the veins per minute. |
venous return |
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cardiac output formula: |
CO = HR x SV |
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it is defined as the cardiac output divided by the body surface area. |
cardiac index |
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the smallest branches of the arteries and the site of highest resistance in the cardiovascular system; have a smooth msucle wall that i extensively innervated by autonomic nerve fibers. |
arterioles |
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_____________ is regulated by the autonomic nervous system |
arteriolar resistance |
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________________ are found on the arterioles of the skin, splanchnic, and renal circulations. |
adrenergic receptors |
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adrenergic receptors are found on arterioles of ________ muscle |
skeletal |
