Perfusion - answer✔passage of nutrients and oxygenated blood through the body to the cells
removal of cellular waste products
what does perfusion depend on? - answer✔normal functioning of the respiratory and cardiac
systems
influences of perfusion - answer✔pump: poor pump, poor perfusion
volume: decrease, then decrease blood to carry O2
INCREASE: volume = organs compensate for the high supply
vessels: HTN, stiff, increase cholesterol
veins: problem e.g. edema, blood can not go back to heart
perfusion: central and local arteries - answer✔pulses
color of extremities
one of the most controllable risk factors for CVD is? - answer✔obesity
(#1 smoking
#2 obesity)
which of the following risk factors is NOT reduced by moderate exercise? - answer✔smoking
coronary arteries - answer✔receive blood during ventricular relaxation: diastole
coronary artery, pacemaker where? - answer✔SA node
R atrium
R ventricle
LAD (left anterior descending artery) - answer✔L ventricle
L coronary artery
widow maker
* most commonly occluded of coronary arteries
supplies the front and bottom of the left ventricle and the front of the septum.
block of LAD? - answer✔block of impulse conduction between atria and ventricles known as
"right/left bundle branch block"
circumflex artery supplies?
a.k.a. circumflex branch of left coronary artery - answer✔supplies most of the left atrium: the
posterior and lateral free walls of the left ventricle, and part of the anterior papillary muscle
may give off a variable number of left marginal branches to supply the left ventricle.
right coronary artery supplies blood to? - answer✔right ventricle
the right atrium
3 controlled by autonomic nervous system
4 adjusts rapidly to regulate cardiac output
stroke volume (SV) - answer✔1 amount of blood ejected by the left ventricle during systole
2 influenced by: HR, preload, after-load, contractility
Ejection Fraction (EF) - answer✔amount of blood ejected by the left ventricle expressed in a %
normal: 50-70%
measured by echocardiogram
preload: 4 concepts - answer✔1 degree of myocardial fiber stretch at the end of diastole
2 determined by L ventricular end-diastolic volume (LVEDV)
3 starling's law: the more the heart is filled during diastole, the more forcefully it contracts (up
to a point)
4 excessive filling= excessive LVEDV= overstretched= decrease CO
Normal heart: preload - answer✔increase preload
increase CO
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