Cardiovascular Flashcards
Senatorial (sa) node
In right atrium and unstable resting potential
Av node
In between atrium and septum, both atriumcontract
Bundle of his
Transfer signal atrium to ventricles
Left and right bundle branch
Split signals to extend down interventricts septum → apex
Purkinjee fibers
Transfers signal to apex and all ventricles myocardium - contract
What does p-wave indicate?
Artia depolarize
What does QRS complex indicate
Ventricular depolarize
What does T wave indicate
Ventricles repolarize
What is mitral stenosis
Mitral valve doesn’t open, trouble filling ventricle
What is mitral insufficiency
Mitral valve doesn’t close, trouble back flow into atrium
What is aortic stenosis
Aortic valve doesn’t open, forcing blood out L ventricle
Aortic insufficiency
Aortic valve doesn’t not close, trouble backflow into L ventricle
What dues vasodilators do?
Reduce peripheral resistance
What does beta-blockers treat
Hypertension and dysrhythmias
What is calcium channel blockers
Reduce cardiac contractility
What does digoxin
Treatment for heart failure
What is antihypertensive drugs
Low blood pressure
What is adrenergic blocking drug?
Act on SNS centrally or on periphery
angiotensin converting enzymes inhibitors
block conversion of angiotension I and angiotension ll
what does diruetic do
remove excess Na+ and H2O, treay high blood pressue and congestive heart failure
anticoagulants
reduce risk of blood clot formation
what does cholesterol lowering drugs do
reduce low density lipoprotein and cholesterol levels
atherosclerosis
atheromas in large arteries
arteriosclerosis
ALL type pf arterial changes
low density lipoprotein (LDL)
lazy, transport cholesterol from liver to cells
high density lipoprotien (HDL)
transport cholesterol away from the peripheral cels to liver– “good” lipoprotein, healthy
