coronary arteries branches of the ascending aorta that supply blood to the heart
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coronary sinus 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
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ejection fraction portion of the blood that is pumped or ejected from the heart with each contraction
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electrocardiogram (ECG) surface recording of the electrical activity of the heart that can be used for diagnosis of irregular heart function
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end diastolic volume (EDV) the amount of blood in the ventricles at the end of atrial systole just prior to ventricular contraction
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endocardium innermost layer of the heart lining the heart chambers and heart valves
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great cardiac vein vessel that follows the interventricular sulcus on the anterior surface of the heart and flows along the coronary sulcus into the coronary sinus on the posterior surface
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heart rate (HR) number of times the heart contracts per minute
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heart sounds sounds heard via auscultation with a stethoscope