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51 terms

Heart

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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