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heart and heart disease

thickest muscular layer of the heart Myocardium
outermost layer of the heart wall that is also part of the pericardium epicardium
layer of the heart that intercalated disk are found Myocardium
why is the heart considered a double pump right side pumps in oxygen to the lungs through the pulmonary circuit,left side pumps oxygenated blood to the remainder of body through systemic circuit
lower chambers of the heart are called ventricles
valve that is located at the exit of the right ventricle Pulmonary valve
chamber of the heart that has thick muscular walls capable of generating the largest force left ventricle
what partition seperates the 2 atria Atrial septum
another name for the right atrioventricular valve tricuspid valve
the 2 semilunar valves Pulmonary valve and Aortic valve
aortic valve prevents blood from reentering which chamber Left ventricle
which layer of the heart wall does coronary circulation provide blood supply to Myocardium
the fisrt branches off the aorta right and left coronary arteries
what is coronary sinus dilated vein that opens into the right atrium near the inferior vena cava that collects blood that is drained from the coronary arteries
active phase of the cardiac cycle systole
during ventricular systole,are the av valves open or closed closed
what is cardiac output the product of stroke volume and heart rate
what is stroke volume volume of blood ejected from the ventricle with each beat
what do chordae tendineae attach to valve flaps to Papillary muscle
the normale pacemaker of the heart that sets the heart rate SA node
through what pathways can impulses travel directly from SA node to the AV node Internodal pathways
what defect does parasympathetic stimulation have on heart rate decreases heart rate
what effect does sympathetic nervous system have on heart rate increases
bradycardia slow heart rate less than 60 beats minn
tachycardia fast heart rate more than 100 beats minn
when does the lubb heart sound occur at the start of the ventricular systole
what causes the dupp sound of the heart sudden closure of the semilunar valves
what is murmur and what is the simplest piece of equipment needed to detect it an abnormal heart sound due to faulty action of valve.a stethascope
endocarditis inflamation of lining of the heart
preicarditis inflamation of the serious membrane on the heart surface as well as the lining of the pericardial sac
what cause atrial septal defect failure of the foramen ovale to close(a small hole in the septum between the right and left atria)
ductus arteriosus small blood vessel in the fetus that connect the pulmonary artery and the aorta so that some blood headed tward the lungs will enter the aorta instead
coarctation a localized narrowing of the aortic arch
medical term for heart attack Myocardial infarction
the area of tissue damaged in a heart attack infarct
angina pectoris chest pain
risk factors for heart attack that cannot be modified age,gender,heredity,body type
risk factors for heart attack that can be modified smoking,physical inactivity,overweight,saturated fat in diet,high blood pressure,diabetes,gout
function of the electrocardiograph used to record electrical changes produced as the heart muscle contracts
what happens in catheterization catheter is passed through the veins of the arm or groin then into the heart,blood samples are obtained along the way for testing and preasure readings r taken
what effects does digitalis have on heart muscle contractions slows and strenthens
function of beta-adrenergic blocking agents control sympathetic stimulation of heart,they reduce the rate and strength of heart contractions,thus reducing the hearts oxygen demand
if SAa node fails to generate a normal heart beat what can be inserted artificial pacemaker
purpose of angioplasty to open restricted arteries in the heart and other areas of the body
what is a stent a small tube that can be inserted in a vessel to keep it open and prevent repeated blockage
what is the SA node the pace maker of the heart
where is the SA node located right atrium
SA node sends regular electrical impulses to the ventricles causing them to contract
what structure relays electrical impulses to ventricles causing them to contract AV node
when watching a EKG what is happing w/ P wave activity in the atria
when watching EKG what is happing w/QRS and T wave activity in ventricles
ischemia lack of blood supply to the area fed by the arteries
occlusion closing of a vessel
stenosis narrowing of a duck or canal
fibrillation very rapid uncoorinated beating of the heart
Created by: cornejo