cardiovascular unit 5

22 cards·by cnweaks

coronary arteries supply what type of blood to the heart

oxygen rich

true or false: pressure is higher in the arteries thatn in the veins

true

vasodilation results in what?

decreased blood pressure

what is the pacemaker of the heart?

sa node

what is the primary extracellular ion?

sodium

what is the sequence of the cardiac conduction system?

sa node, av node, bundle of his, purkinje fibers

fluid flows from a region of ____pressure to a region of ____ pressure

higher, lower

stroke volume is influenced by what 3 factors

preload, afterload, and contractility

pressure in ventricles at the end of diastole

preload

amount of resistance to ejection of blood from ventricles

afterload

the force generated by the myocardium under any given circumstance

contractility

percentage of blood that is ejected from the ventricles with each heart beat

ejection fraction

amount of pressure needed to push blood out of the right ventricle into the pulmonary artery

pulmonary vascular resistance

most deaths related to heart disease are caused by what?

coronary artery disease

best diagnostic tool to rule out a MI is?

12 lead EKG

difference between the systolic and diastolic; indicates how well the body is maintaining cardiac output

pulse pressure

vibration or purring sensation felt indicates turbulent blood flow called a____

thrill

what heart sound is indicative of heart failure

what cardiac bio marker is indicative of a MI

troponin

the more increased the greater the chance of HF

BNP

secreted by the ventricles, neurohormone that responds to volume overload in the heart by acting as a diuretic and vasodilator

BNP

increases the strength and efficiency of heart contractions, and is useful in the treatment of heart failure

Digoxin