heart and heart disease
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| thickest muscular layer of the heart | Myocardium
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| outermost layer of the heart wall that is also part of the pericardium | epicardium
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| layer of the heart that intercalated disk are found | Myocardium
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| 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
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| lower chambers of the heart are called | ventricles
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| valve that is located at the exit of the right ventricle | Pulmonary valve
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| chamber of the heart that has thick muscular walls capable of generating the largest force | left ventricle
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| what partition seperates the 2 atria | Atrial septum
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| another name for the right atrioventricular valve | tricuspid valve
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| the 2 semilunar valves | Pulmonary valve and Aortic valve
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| aortic valve prevents blood from reentering which chamber | Left ventricle
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| which layer of the heart wall does coronary circulation provide blood supply to | Myocardium
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| the fisrt branches off the aorta | right and left coronary arteries
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| 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
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| active phase of the cardiac cycle | systole
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| during ventricular systole,are the av valves open or closed | closed
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| what is cardiac output the product of | stroke volume and heart rate
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| what is stroke volume | volume of blood ejected from the ventricle with each beat
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| what do chordae tendineae attach to valve flaps to | Papillary muscle
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| the normale pacemaker of the heart that sets the heart rate | SA node
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| through what pathways can impulses travel directly from SA node to the AV node | Internodal pathways
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| what defect does parasympathetic stimulation have on heart rate | decreases heart rate
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| what effect does sympathetic nervous system have on heart rate | increases
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| bradycardia | slow heart rate less than 60 beats minn
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| tachycardia | fast heart rate more than 100 beats minn
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| when does the lubb heart sound occur | at the start of the ventricular systole
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| what causes the dupp sound of the heart | sudden closure of the semilunar valves
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| 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
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| endocarditis | inflamation of lining of the heart
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| preicarditis | inflamation of the serious membrane on the heart surface as well as the lining of the pericardial sac
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| what cause atrial septal defect | failure of the foramen ovale to close(a small hole in the septum between the right and left atria)
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| 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
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| coarctation | a localized narrowing of the aortic arch
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| medical term for heart attack | Myocardial infarction
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| the area of tissue damaged in a heart attack | infarct
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| angina pectoris | chest pain
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| risk factors for heart attack that cannot be modified | age,gender,heredity,body type
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| risk factors for heart attack that can be modified | smoking,physical inactivity,overweight,saturated fat in diet,high blood pressure,diabetes,gout
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| function of the electrocardiograph | used to record electrical changes produced as the heart muscle contracts
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| 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
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| what effects does digitalis have on heart muscle contractions | slows and strenthens
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| 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
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| if SAa node fails to generate a normal heart beat what can be inserted | artificial pacemaker
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| purpose of angioplasty | to open restricted arteries in the heart and other areas of the body
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| what is a stent | a small tube that can be inserted in a vessel to keep it open and prevent repeated blockage
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| what is the SA node | the pace maker of the heart
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| where is the SA node located | right atrium
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| SA node sends regular electrical impulses to the ventricles causing them to | contract
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| what structure relays electrical impulses to ventricles causing them to contract | AV node
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| when watching a EKG what is happing w/ P wave | activity in the atria
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| when watching EKG what is happing w/QRS and T wave | activity in ventricles
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| ischemia | lack of blood supply to the area fed by the arteries
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| occlusion | closing of a vessel
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| stenosis | narrowing of a duck or canal
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| fibrillation | very rapid uncoorinated beating of the heart
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Created by:
cornejo
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