Chorda

Chord (Chorda, Plural Chordae) - cord, ligament or nerve fibers. Chordae tendineae (chordae tcndineae) are connective tissue cords that originate from the papillary muscles of the walls of the ventricles of the heart and are attached to the edges of the ventricular side of the cusps of the mitral and tricuspid valves. Rupture of the chordae tendineae due to injury, endocarditis, or degenerative changes in the body can lead to the development of valve insufficiency in a person.

The chords are intermediate elements of the structure of the semilunar valves of the heart. They are made of dense, dense and fibrous collagen. Located between the individual leaflets of each valve and provide a certain stability of the leaflets to avoid occlusion of the venous cava. If the chordal ligaments are weakened or damaged and become less tight, this can lead to valve malfunction, especially if the valves begin to stretch or become overloaded. Symptoms of weakened chordae may include discomfort in the heart (or other parts of the chest) and a feeling of irregular heartbeat when the person continues to work.

Tragi

The notochord is a cord (ligament) or nerve fiber. There are two types of these cords in the heart: chordae tendineae and chordae of the heart valves. The existence of chordae tendinae is associated with contraction of the atrial myocardium, which is why they are called Leone's nodes and are located at the base of the valve papillae.

The tendinous (or chordae) chordae are cords of connective tissue. They start from the tendinous part of the papillary muscle and are attached to the edge of the valve on its substantive side. Despite the fact that the tendinous part of the papilla is thinner than the rest, it is able to compensate for the insufficient approach of the edges of the valve leaflets due to the presence of the tendinous chord. In addition, the strength of the tendon fibers is higher than that of the round, fleshy valve leaflets. Therefore, chordae tendineae are a “lifeline” for aortic valve insufficiency, which prevents deformation of the valves and the risk of developing tricuspid regurgitation. Cardiovascular surgeons transplant chordae tendineus during stenting for peripheral valve appendage closure in newborns because it has greater extensibility than the teres muscle, or implant an artificial muscle when the pulmonary valve is critically dilated.

A rupture of the tendon tract that begins as a consequence of injury or the development of infective endocarditis is called a “rupture of the papillary chord.” This diagnosis can be made by transthoracic echocardiography in patients with heart failure in the posterior cavity type.