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apex

the name for the tip of the heart

SA and AV nodes

cardiac muscle tissue that is specialized to conduct rather than contract is found in these

left atrium and ventricle

chambers of the heart that contain freshly oxygenated blood

right atrium and ventricle

chambers of the heart that contain deoxygenated blood

SA node

commonly called the "pacemaker"

epicardium

layer of the heart that is on the very outside surface

"lub" sound

caused by AV valves closing

coronary arteries

heart muscle is oxygenated by

chordae tendinae

connected to the cuspid valves to prevent them from flapping backwards

Papillary muscles

found in the ventricles

interventricular septum

separate the ventricles

myocardium

muscular heart wall

aortic semilunar valve

prevents the backflow of blood into the left ventricle

Heart murmurs

caused by leaking valves

myocardial infarction

death of heart tissue itself

Tachicardia

very rapid heart beat

Lidocaine

slows down the heart

EKG

recording of the heart's electrical charges

systole

Contraction of the heart

120

Normal systolic pressure for an adult

Veins

have valves to prevent deoxygenated blood from collecting in your extremities

aorta

major artery containing oxygenated blood

plaque

build-up of fats and cholesterol on vessel walls

diastole

relaxing heart

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