What happens if chordae tendineae become non functional?

What happens if chordae tendineae become non functional?

If chordae tendinae of the tricuspid valve became partially non-functional due to injury then the flow of blood into the pulmonary artery will be reduced. The valves in the heart allow the flow of blood only in one direction, i.e, from the atria to the ventricles and from the ventricles to pulmonary artery or aorta.

What is likely to occur if the chordae tendineae are defective?

If there is not enough tension on the chordae tendineae, the cusps may not close properly and blood may leak backwards, or regurgitate. In this example, the cusps of the mitral valve are prolapsing, or failing to close properly. Blood is leaking back into the left atrium from the ventricle.

What happens when chordae tendineae contract?

Chordae tendineae are relaxed because the atrioventricular valves are forced open. When the ventricles of the heart contract in ventricular systole, the increased blood pressures in both chambers push the AV valves to close simultaneously, preventing backflow of blood into the atria.

What happens when the pacemaker is non functional?

If the pacemaker of the heart is not functional, the cardiac muscles will not be able to contract rhythmically in a coordinated manner. This would, in turn, affect the pumping of blood and may even lead to cardiac arrest.

Where are chordae tendineae located?

The chordae tendineae (singular: chorda tendinea, is rarely used) are thin strong inelastic fibrous cords that extend from the free edge of the cusps of the atrioventricular valves (the tricuspid and mitral valves) to the apices of the papillary muscles within the right and left ventricles respectively.

Which muscles do the chordae tendineae attached to?

Chordae tendineae: Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles, small muscles within the heart that serve to anchor the valves.

Is the pacemaker is absent?

A failure of output is suspected if the heart rate is below the programmed lower rate of the pacemaker and no pacer electrical output is noted on the electrocardiogram (ECG)—that is, pacing spikes are absent.