ANATOMY

Detailed explanation-1: -Since the blood pressure in atria is much lower than that in the ventricles, the flaps attempt to evert to the low-pressure regions. The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position.

Detailed explanation-2: -These muscles attach to the tricuspid and mitral valve leaflets via the chordae tendineae and functionally prevent regurgitation of ventricular blood via tensile strength by preventing prolapse or inversion of the valves during systole.

Detailed explanation-3: -Papillary muscles, finger-like projections from the wall of the ventricles, connect the chordae tendineae (heartstrings) to the cusps of the atrioventricular valves. This connection prevents the valve from prolapsing under pressure.

Detailed explanation-4: -Chordae tendineae maintain the position and tension of the atrioventricular valves (tricuspid and bicuspid valves). They maintain the one-way blood flow from the auricle to the ventricles.

Detailed explanation-5: -The chordae tendinae are primarily responsible for the end-systolic position of the anterior and posterior leaflets. Arising from the papillary muscles, they are classified according to their site of insertion between the free margin and the base of leaflets (Figure 1).