Heart
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51 terms
Terms | Definitions |
|---|---|
 AV valves | valves that are open during atrial systole |
| adrenaline | example of a positive chronotropic drug |
| adrenaline (or digitalis) | an example of a positive inotropic drug |
| afterload | a term used to describe the blood pressure in the great arteries leaving the heart |
| atrial fibrillation | the term used to describe atria that are twitching but are not moving any blood |
| atrial systole | term for atrial contraction |
| bradycardia | a heart rate less than 50-60 bpm |
| cardiac cycle | one systole and one diastole |
| cardiac output | stroke volume X heart rate is called |
| cardiac reserve | the amount above normal that cardiac output can be increased (norm 4-5X) |
| cor pulmonale | right-side heart failure due to pulmonary disease (increased pressure) |
| sv will decrease initially | SV will do this initially when afterload is high |
| CO will decrease | effect of vagal stimulation on cardiac output |
| CO will decrease | effect of high K+ on cardiac output |
| diastole | part of the cardiac cycle most shortened in tachycardia |
| diastole | ventricular relaxation |
| ejection fraction | the term for SV/EDV X 100 |
| end diastolic volume | meaning of EDV |
| end systolic volume | meaning of ESV |
| Frank Starling Law | law that states the greater the EDV, the greater the SV |
| HDL | abbreviation for high density lipoprotein (good fat) |
| SV will increase | SV tends to do this when EDV is high |
| CO will increase | effect of increasing preload on cardiac output |
| isovolumetric contraction | phase in systole (very short) when all 4 VALVES are CLOSED |
| isovolumetric contraction and ejection | two phases of systole |
| isovolumetric relaxation | phase in diastole (very short) when all 4 valves are closed |
| LDL | abbreviation for low density lipoprotein (bad fat) |
| left ventricle | the part of the systemic circuit that has to create the highest pressure |
| ml/min or L/min | units of cardiac output |
| none | phase in the cardiac cycle when all four valves are open |
| none | amount of blood that is pumped during ventricular fibrillation |
| passive filling | phase in diastole when most blood enters the ventricles |
| positive chronotropic | a drug that increases RATE of HEART is described this way |
| positive inotropic | a drug that increases FORCE of CONTRACTION of heart is described this way |
| pulmonary edema | type of edema seen during left congestive heart failure |
| right ventricle | the part of the PULMONARY circuit that has to create the highest pressure |
| stroke volume | meaning of SV |
| systemic edema | type of edema seen during right congestive heart failure |
| systole | ventricular contraction |
| systole | time in the cardiac cycle when semilunar valves are open |
| systole | time in the cardiac cycle when AV valves are shut |
| tachycardia | a heart rate of over 100 beats per minute |
| venous return aka preload | amount of blood coming into heart |
| ventricular fibrillation | the term used to describe ventricles that are twitching but not moving any blood |
| 0.3 sec ventricular systole | approximate time it takes for the ventricles to beat |
| 60/heart beat=0.55 sec | length of the cardiac cycle if the heart beat is 110 |
| 60/heart beat=0.86 sec | length of the cardiac cycle if the heart rate is 70 |
| 120-130ml | typical value for the EDV |
| 70 percent | amount of blood that reaches the ventricles during atrial fibrillation |
| 70 percent | amount of blood that enters ventricles during passive filling |
| 70ml | normal value for stroke volume |
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