The heart's cardiac skeleton comprises four dense connective tissue rings that encircle the mitral and tricuspid atrioventricular (AV) canals and extend to the origins of the pulmonary trunk and aorta.

[1] The unique matrix of connective tissue within the cardiac skeleton isolates electrical influence within these defined chambers.

Understood as such, the cardiac skeleton efficiently centers and robustly funnels electrical energy from the atria to the ventricles.

The cardiac skeleton binds several bands of dense connective tissue, as collagen, that encircle the bases of the pulmonary trunk, aorta, and all four heart valves.

Distensibility of the ventricles is tied to variable accumulation of minerals which also contributes to the delay of the depolarization wave in geriatric patients that can take place from the AV node and the bundle of His.

The valve rings, central body, and skeleton of the heart consisting of collagen are impermeable to electrical propagation.

[3] The fibrous rings surrounding the arterial orifices serve for the attachment of the great vessels and semilunar valves, they are known as The aortic annulus.

Electrical signals from the sinoatrial node and the autonomic nervous system must find their way from the upper chambers to the lower ones to ensure that the ventricles can drive the flow of blood.

Simply put, the dense connective tissue within the cardiac skeleton does not conduct electricity and its deposition within the myocardial matrix is not accidental.

Where collagen is diminished by age, calcium is often deposited, thus allowing readily imaged mathematical markers which are especially valuable in measuring systolic volumetrics.