Cardiac conduction abnormality

What it means

Any anomaly of the progression of electrical impulses through the heart.

The conduction system of the heart initiates and coordinates the electric signal that causes the rhythmic and synchronized contractions of the atria and ventricles. In higher vertebrates, this system comprises the sinuatrial (SAN) and atrioventricular nodes (AVN) and the wiring of the ventricles. The latter comprises the atrioventricular bundle (AVB), the left and right bundle branches (BBs), and the peripheral ventricular conduction system (PVCS).

Rare diseases that can present with this17

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Abnormality of cardiac conduction · Abnormality of cardiac conduction system · Cardiac conduction abnormalities · Cardiac conduction defects · Heart conduction disorder