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29 Cards in this Set

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On the cardiac cycle curves, where do you point to diastasis?
on the ventricular pressure curve
ejection fraction?
stroke vol / end diastolic vol

recall:
EDV - ESV = stroke vol (ejection vol)
what is normal efection fraction?
60%
cardiac output?
heart rate * stroke vol
sympathetic burst causes what cardiac response
incr heart rate
vasoconstriction
law of laplace
larger the radius of vessel,
the greater the wall tension
Bainbridge reflex?
autonomic reflex that increases the heart rate if right atrium is stretched.
What 2 effects causes increased heart rate after stretched right atrium?
Bainbridge reflex and
SA node stretching
when afterload increases, does stroke work increase?
yes
the adrenergic sympathetic fibers of the heart release ______
norepinephrine
norepinephrine interacts with ________ receptors to increase heart rate, condution velocity, and contractility
beta adrenergic
what keeps the heart from beating at its intrinsic SA node rate?
parasympathetic tone
the heart's parasympathetic fibers travel via the ____
vagus nerve
the heart's parasympathetic fibers release ______ neurotransmitter
Ach
Acetylcholine interacts with muscarinic receptors to reduce heart rate at the ____node and conduction velocity at the ______node
SA

AV
too much calcium will cause the heart to _____
spasm
what are the effects of potassium on cardiac function?
heart dilates,
becomes flaccid and slow,
conduction at AV node can be blocked
decrease in memb potential
decreased intensity of action potential
decreased calcium has an effect on cardiac function that is similar to INCREASED _________
potassium
increased temperature has what effect on heart rate?
increases HR
intrinsic ability of heart to contract is related to the number of _________
crossbridges
ventricular dP/dt helps assess ventricular _______
contractility
most common cause of valvular lesions
rheumatic fever
murmur of aortic regurg
blowing, high-pitched
diastolic
murmur of mitral regurg
blowing, high pitch
systolic
mitral stenosis murmur
thrill over apex
end of diastole
murmur of aortic stenosis
systolic
crescendo-decrescendo
Murmur of PDA
machinery, wax and wane
4 charcs of tetralogy of fallot
aorta in right ventricle
pulmonary artery stenosis
right to left shunt (VSD)
right ventricular hypertrophy
where is the coarctation of the aorta?
b/w the heart and the kidneys