blood flow through the heart
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11 terms
Terms | Definitions |
|---|---|
 normal intracardiac pressures | -right atrium: 4mmHg; range: 0-8 mmHg -right ventricle systolic: 24 mmHg; range: 15-28 mmHg end -diastolic: 4 mmHg; range: 4-12 mmHg -left atrium: 7 mmHg; range: 4-12 mmHg -left ventricle systolic: 130 (peak) mmHg; range: 90-140 mmHg end-diastolic: 7 mmHg; range: 4-12 mmHg |
| heart sounds | -1st heart sound, "lub" occurs when atrioventricular valves close; AV valves closing; tricuspid & mitral valve -2nd heart sound, "dub" occurs when semilunar valve colses; pulmonic & aorta closing |
| conductions system of the heart | -2 pacemakers (SA node; AV node) -atriums open during fill up -right bundle branch -right ventricle -purkinje fibers -left ventricle -left bundle branch -left atrium -bundle of his |
| atherosclerosis | condition in which fatty deposits called plaque build up on the inner walls of the arteries |
| blood flow through heart | vena cava, r atrium, tricuspid valve, r ventricle, pulmonary valve, pulmonary trunk, pulmonary arteries, lungs - drop off CO2 and pick up O2, pulmonary veins, l atrium, biscuspid valve (mitral valve), l ventricle, aortic valve, aorta, aortic branches (arterioles) to the rest of the body -in right, out left -80 pushing in (keeps valves shut); over 80 pushing out (opens valves) |
| diastolic | The blood pressure during that part of the heartbeat when the hearts venticles are relaxing. -realxation/at rest -filling up -tricuspid & mitral valve open up |
| systolic | measurement of blood pressure taken when the heart is contracting and forcing blood into the arteries -starts to contract -aortic & pulmonary valve open up |
| T-wave | ventricular repolarization -goes back to negative |
| QRS-wave | ventricular depolarization -goes more positive -sodium goes in; calcium channels open up, poors in spikes up |
| symptoms of heart attack | -chest discomfort -pain in back, neck, left arm, middle back, possibility shoulder, stomach, jaw |
| EKG | a graphical recording of the cardiac cycle produced by an electrocardiograph -P-wave= atrial depolarization (QRS) -no QRS=block between atrium & ventricle -wide QRS= electrical signal is slowing down; longer for depolarization when electrolytes are off (sodium/potassium) |
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