Chapter 19 - Cardiovascular: Heart Anatomy Vocabulary

aortic valve

(also, aortic semilunar valve) valve located at the base of the aorta

T wave

component of the electrocardiogram that represents the repolarization of the ventricles

mitral valve

(also, left atrioventricular valve or bicuspid valve) valve located between the left atrium and ventricle; consists of two flaps of tissue

heart rate (HR)

number of times the heart contracts (beats) per minute

endocardium

innermost layer of the heart lining the heart chambers and heart valves; composed of endothelium reinforced with a thin layer of connective tissue that binds to the myocardium

end diastolic volume (EDV)

(also, preload) the amount of blood in the ventricles at the end of atrial systole just prior to ventricular contraction

end systolic volume (ESV)

amount of blood remaining in each ventricle following systole

cardiac output (CO)

amount of blood pumped by each ventricle during one minute; equals HR multiplied by SV

coronary sinus

large, thin-walled vein on the posterior surface of the heart that lies within the atrioventricular sulcus and drains the heart myocardium directly into the right atrium

sinoatrial (SA) node

known as the pacemaker, a specialized clump of myocardial conducting cells located in the superior portion of the right atrium that has the highest inherent rate of depolarization that then spreads throughout the heart