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56 terms

heart chap13

the heart is
the pump that circulates blood to all parts of the body
arteries, viens and capillaries
are structures that take blood from the heart to the cells and return blood from the cells back to the heart
carries oxygen and nutrients to the cells and carries wastes away
the lymph system
returns excess fluid from tissues to general circulation
the hearts apex
lies on the diaphram and points to the left of the body.
heart sounds are heard thru
a stethoscope.
surrounds the heart its a double layer of dense fibrous tissues
cardiac muscle
covers the heart valves and lines the blood vessels
superior vena cava
bring deoxygenated blood to the right atrium
coronary sinus
heart muscle to the right atrium
pulmonery artery
takes blood away from the right ventricle to the lungs for oxygenation
pulminary veins
bring oxygenated blood from the lungs to the left atrium
takes blood away from the left ventricle to the rest of the body.
lower chambers of the heart
right and left ventricle
tricuspid valve
positioned between the right atrium adn the right ventricle.
chordae tendinae
small fibrous strands connectiong the edges of the tricuspid valve to the pappilary muscle that are projections of the myocardium.
mitral valve
located between the left atrium and the left ventricle blood flows from the left atrium into the left ventricle
lumonary semilunar valve
found at the orifice of the pulmonary artery it allows blood to travel from right ventricle into the pulmonary artery.
right side of heart
deoxygenated blood flows into the heart from the superior and inferior vena the right atrium to the tricuspid valve to the right ventricle through the pulminary semilunar valves to the pulmonary arterywhich takes blood to the lungs for oxygen.
left side of heart
oxygenated blood flows into the heart from the lungs by the pulminary veins to the left atrium through the bicuspid valve to the left ventricle to the aorta for general circulation.
stroke volume
amount of blood ejected from the ventricles
cardiac output
total volume of blood ejected from the heart per minute.
heart sounds are also known as
lubb dubb sounds
ecg or ekg
ideal cholesteral level
less than 200
ldl low density lipoprotien level
less than 100
HDL high density lipoprotien
40 or higher
less than 150
used to discuss any change from the normal rate or rhythm of the heart
slow heart rate less than 60bpm
rapid heart rate more than 100bpm
indicate some defects in the valves of the heart shen valves fail to close properly a gurgling or hissing sounds will occur.
mitral valve prolapse
which the vale between the left atria and the left ventricle closes imperfectly symptyms are fatigue palpitations headache chest pain and anxiety
coronary artery disease
narrowing of the arteries that supply oxygen and nutrient filled blood heart muscle
angina pectoris
severe chest pain that arises whe the heart doesnt recieve enough oxygen.
myocardial infarction
heart attack
inflammation of the outer membrane covering the heart
inflammation of the heart muscle
inflammation of the membrane that lines the heart and covers the valves
rheumatic heart disease
may result of a person having frequent strep throat ifections during childhood
heart failure
occurs when the ventricles of the heart are unable to contract effectively and blood pools in the heart
excessive blood in the tissues
CHF congestive heart failure
similar to heart failure but in addition there is edema in the lower extremities
is said to occur whe the conduction system of the heart is affected.
premature contractions
arrythmia disorder
rhythm breaks down and muscle fibers contract at random without coordination
helps open clogged vessels
coronary bypass
surgical detour or bypass that allows bloodsupply to go around the blocked area of the coronary artery.
cardiac stents
hold arteries open after angioplasty
human hearts own pacemaker
sinus node.
q wave
negative deflection
r wave
positive deflection
s wave
is a negative wave
t wave
positive wave and represents ventricular re polarization
u wave
occasionally seen ain some patients is a positive deflection and associated with repolarization.