Med Term Chap 11

heart stuff

**A**rteries

the vessels that lead away from the heart

Veins

have thinner walls than arteries and move deoxygenated blood toward the heart

Capillaries

are the smallest vessels. They transport blood, nutrients and oxygen to cells in your organs and body systems.

Tricuspid valve (cusps are flaps of the valves)

between the right atrium and right ventricle

Pulmonary valve

between the right ventricle and pulmonary artery

Mitral valve

between the left atrium and left ventricle

Aortic valve

between the left atrium and aorta

Diastole

**relaxation**

Systole

contraction

lubb

closure of the tricuspid and mitral valves at the beginning of systole

dubb

closure of the aortic and pulmonary valves at the end of systole

murmur

an abnormal heart sound caused by improper valve closure

Sinoatrial node (SA node)

the pacemaker of the heart

Pacemaker

origin of electrical impulse causing walls of the atria to contract and force blood into the ventricles (ending diastole)

Atrioventricular node (AV node)

This sends the excitation wave to a bundle of specialized fibers called the atrioventricular bundle or Bundle of His

ECG or EKG (electrocardiogram)

The record used to detect electrical changes in heart muscle as the heart beats

P wave

spread of excitation wave over the atria just before contraction

QRS wave

spread of excitation wave over the ventricles as the ventricles contract

T wave

electrical recovery and relaxation of ventricles

Blood pressure

The force that blood exerts on arterial walls (measured using a sphygmomanometer). Expressed as a fraction systolic pressure/diastolic pressure.

aneurysm/o

aneurysm

angi/o

vessel

aort/o

aorta

arter/o

artery

arteri/o

artery

ather/o

yellowish plaque

atri/o

atrium

axill/o

armpit

brachi/o

arm

cardi/o

heart

cholesterol/o

cholesterol

coron/o

heart

cyan/o

blue

isch/o

to hold back

my/o

muscle

myx/o

mucus

ox/o

oxygen

pericardi/o

pericardium

phleb/o

vein

pulmon/o

long

rrhythm/o

rhythm

sphygm/o

pulse

steth/o

chest

thromb/o

clot

valvul/o

valve

valv/o

valve

vas/o

vessel

vascul/o

vessel

ven/o ven/i

vein

ventricul/o

ventricle

-constriction

narrowing

-dilation

widening stretching expanding

-emia

blood condition

-graphy

process of recording

-lysis

breakdown separation destruction loosening

-megaly

enlargement

-meter

measure

-oma

tumor mass fluid collection

-osis

condition usually abnormal

-plasty

surgical repair

-sclerosis

hardening

-stenosis

tightening structure

-tomy

process of cutting

a- an

no not without

brady-

slow

de-

lack of down less removal of

dys-

bad painful difficult abnormal

endo-

in within

hyper-

above excessive

hypo-

deficient below under less than normal

inter-

between

peri-

surrounding

tachy-

fast

tetra-

four

tri-

three