HBS Unit 3

systolic pressure

pressure in the arteries when the heart undergoes (____)-heart contracts to push blood through the body

Diastolic pressure

Pressure in the arteries when heart goes (_____)- the heart is at rest, allowing chambers to fill with blood

Atherosclerosis

build up of plaque

ABI Index: Normal

above 0.90

ABI Index: mild obstruction

0.71-0.90

ABI Index: moderate obstruction

0.41-0.70

ABI Index: severe obstruction

0.00-0.40

P

Atria depolarized and contracts

P-Q

How long it takes for electrical signal to travel from SA to AV

QRS Complex

ventricles depolarize

S-T

Ventricles contract

T

Ventricles repolarize

Pulmonary veins

transports 02 rich blood from lungs to heart

Pulmonary loop

right side of heart picks up 02 poor blood from body and moves it to lungs for cleaning and reoxygenation

Pulmonary arteries

transport deoxygenated blood from right side of heart to lungs for oxygenation

Systemic loop

once blood is re-oxygenated, left side of heart moves blood throughout body, providing 02 where its needed

Tidal volume (TV)

volume of air breathed in and out without conscious effort

Inspiratory reserve volume (IRV)

Additional volume of air that can be inhaled with max effort after normal exhalation

Expiratory reserve volume (ERV)

Additional volume of air that can be forcibly exhaled after normal exhalation

Vital capacity (VC)

total volume of air that can be exhaled after max inhalation → __=TV+IRV+ERV

Residual volume

volume of air that remains in lungs after max exhalation, normal conditions; lungs are never fully empty

Total lung capacity (TLC)

total volume of lungs: sum, of VC and residual volume → ___= VC+RV