What is the chordae?
What is the chordae?
The chordae tendineae (tendinous cords), colloquially known as the heart strings, are inelastic cords of fibrous connective tissue that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.
What are the types of chordae tendineae?
Five types of chordae were distinguished by their morphology and mode of insertion: Fan-shaped, rough zone, basal, free edge, and deep chordae.
What is the main function of the chordae tendineae?
Chordae Tendineae and Papillary Muscles The chordae provide the critical function of anchoring the mitral leaflets during systole, allowing for symmetric coaptation and preventing prolapse of the leaflets into the LA.
What are the chordal attachments?
Chordae tendinae Primary chords attach to the free edge of the rough zone of both leaflets. Secondary chords attach to the ventricular surface in the region of the rough zone (i.e. body of the leaflet). The tertiary chords are found in the mural (posterior) leaflet only which has a basal zone.
What is the moderator band?
The moderator band, also called the septomarginal trabecula, is a consistent structure in the morphologic right ventricle and can be helpful as a landmark in situations where the ventricles may be ambiguous (i.e. in some forms of congenital heart disease).
How many chordae does mitral valve have?
chordae), 14 to the posterior leaflet (10 rough zone chordae, two cleft chordae and two basal chordae) and two are inserted into the commissures.
What do chordae tendineae prevent?
The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position.
What is the function of the chordae tendineae and the papillary muscles?
Introduction: The papillary muscles (PM) play a vital role in atrioventricular (AV) valve function. The PM and their chordae tendineae (CT) regulate the closure of the AV valve during systole.
Does everyone have a moderator band?
The moderator band (MB, also known as the septomarginal trabecula) found in all human hearts is derived from the muscle band of the interventricular septum, begins below the septal end of the supraventricular crest, and runs toward the anterolateral wall of the ventricle [1].