Cardiology

2 factors of Venous Circulation

one way valves, muscle/skeletal pump

Afterload

measure of pressure, how hard it is to eject blood

Delay between S1 and S2 allows…

ventricles to fill with blood

Diastole

Atria contracting, vent relaxing

Endocardium

inside the heart, makes heart valves

Ideal cardiac output

high preload, low afterload

Lumen

inner hollow of vessels

Myocardium

muscle layer, thickest layer

Pericardium

parietal and visceral layers, prevents overfilling

Preload

how much blood is sucked into the heart

S1

"Lub" Sound

S2

"Dub" Sound

Systole

Vent contracting, atria relaxing

Tunica External

external layer, adventitia

Tunica Intima

endothelium, internal layer

Tunica Media

Middle Layer

What is the main artery that provides blood to left ventricle?

Left anterior descending artery

When are AV valves open

Diastole

When are SL valves open

Systole

Where does blood slow the most?

arterioles

Which coronary artery is responsible for widow maker heart attacks?

left anterior descending artery