Heart Valves

HEART DISEASE

      CARDIAC ANATOMY AND PHYSIOLOGY OF HEART 

     HEART TISSUE

      CORONARY ARTERIES 

Heart Valves ;    

            Four heart valves ensure one-way blood flow through the heart. Two atrioventricular valves are located between the atria and ventricle. The atrioventricular valve, positioned between the RA and RV, is termed the tricuspid valve; the left atrioventricular valve is the mitral valve (also known as the bicuspid valve), located between the left atrium and ventricle. he semilunar valves lie between the ventricles and arteries and are named based on their corresponding vessels (i.e., pulmonic valve on the right in association with the pulmonary artery, and aortic valve on the left relating to the aorta).

           Flaps of tissue called leaflets or cusps guard the heart valve openings. he right atrioventricular valve has three cusps and is therefore termed tricuspid, whereas the left atrioventricular valve has only two cusps and hence is termed bicuspid. These leaflets are attached to the papillary muscles of the myocardium by chordae tendineae. the primary function of the atrioventricular valves is to prevent backflow of blood into the atria during ventricular contraction or systole, while the semilunar valves prevent backflow of blood from the aorta and pulmonary artery into the ventricles during diastole. Opening and closing of each valve depends on pressure gradient changes within the heart created during each cardiac cycle.

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