Cariovascular Flashcards
preload
the end diastolic volume of the left ventricle
Q (dot)
cardiac output: the amount of blood pumped by the left ventricle per unit time (5L/min) Q=hr * stoke vol.
splanchnic
liver + gut
ejection fraction
% end diastolic volume (120-140 ml) ejected (end systolic volume 40-60 ml) per beat (50-75%)
cardiac index
2.6-4.2 L /min/ square meter BSA. a way to normalize CO
Organ pressure equation
[Q=DeltaP/R] or
amt of blood entering (L/min) = change in pressure of blood coming in and out of the organ/organ’s vascular resistance
mean aterial pressure
100
mean pulmonary arterial pressure
40 mmHg
which has lower resistance systemic or pulmonary circulation
flow is the same, smaller change in pressure for the lungs, so lower resistance in the PULMONARY
beta-1 receptor in the AV node
adrenergic( norepinephrine) increase hr
beta-1 AV node receptors
adrenergic. increase conduction velocity, decrease P-R interval
beta-1 receptors in atrial and ventricular muscle
increase inotropic state (contractility)
alpha-1 receptors in vascular smooth muscle
adrenergic. increase total peripheral resistance AKA arterial TPR (decreasing CO), increase venous return (decreasing resistance, increasing CO)
the adrenergic receptor in skeletal muscle (epinephrine)
beta-2 receptors. non-innervated. vasodilating for sk. mus. arterioles.
what direction does ventricular contraction occur
from apex to base
