Part 5 Flashcards
what is released from the endothelial wall the prevents platelet aggregation
prostacyclin
what converts fibrinogen to fibrin
thrombin
why is elevated homocysteine a risk factor in heart disease
stimulates platelet aggregation
during depolarization, which is the correct sequence of permeability changes in a typical ventricular cell
Na, Ca permeability increasing; K permeability decreasing
an increase in aortic BP will induce what change
an increase in LV force of contraction
Ach binds to
muscarinic cardiac receptors
NE binds to
beta cardiac receptors
thyroid hormones T3 and T4 have a negative inotropic effect on the ventricle
false
when does myocardial blood flow peak in the LV
at the onset of systole
on the ST segment
the wave of depolarization is moving toward the positive electrode
who is more susceptible regarding a prolonged QT interval
males
if you block fast Na channels in a typical cardiac muscle cell using tetrodotoxin, what will be observed
depolarization is slowed
an occasional isolated P wave with no associated QRS complex is characteristic of
first degree AV block
