health science theory and practice

Right atrium

receives deoxygenated blood from body via superior & inferior vena cava

Right ventricle

pumps deoxygenated blood   to the lungs via pulmonary veins

Left atrium

receives oxygenated blood from lungs via pulmonary veins

Left ventricle

pumps oxygenated blood to body via aorta

Tricuspid valve

allow blood to flow from right atrium to right ventricle

Pulmonary valve

allows blood to flow from right ventricle to pulmonary artery

Mitral valve

allows blood to flow left atrium to right ventricle 

Aortic Valve

allows oxygen to be pumped 

Pulmonaries arteries

carry deoxygenated blood while all other carry oxygenated

Pulmonary vein

carries oxygenated blood, others don’t, thinner walls, lower pressure

Capillaries

microscopic vessels where gas and nutrient exchange occurs

Electron Conduction System

controls the rate & rhythm of the heartbeat

What is another name for the flat baseline of an ECG that separates the various waves and represents the periods in the cardiac cycle when there are no currents?

isoelectric line

 Atrial depolarization

Excitement and contraction caused by the SA node at the beginning of the cardiac cycle

Purkinje fibers

Network of fibers found in the cardiac muscle that carries the electrical impulses resulting in contraction of the ventricles.

 electrodes

Instrument with a point or a surface that transmits current to a patient’s body

SA Nodes

pacemaker of the heart

Atriovascular node

gatekeeper of the heart

Bundle of His

fibers that carry signals from the AV node to the septum

Pulmonary Circulation

blood to, within, and coming from the lungs (exchanges CO2 for O2)

Coronary circulation

blood circulating in heart’s arteries and veins (oxygen direct)

somatic tremor

appears jagged & irregular line

causes: shivering, Parkinson’s, movement (muscular movement)

AC interference

regular uniform shape

causes: electrical equipment

Wandering Baseline

baseline drifts up and down

causes: loose electrodes, poor skin contact, sweating, breathing

Patient Movement

spikes