Trabeculae carneae are irregular muscular ridges and columns on the inner walls of both ventricles. Some are simple ridges, some form bridges attached at both ends, and the papillary muscles are a specialised form. They are coarser in the right ventricle and finer in the left.
| Location | Inner walls of the inflow parts and apices of the right and left ventricles; the outflow tracts are smooth. |
|---|---|
| Parts |
|
| Blood Supply | Coronary artery branches of the respective ventricle |
Help prevent suction that would occur with a flat wall, contribute to ventricular contraction and carry parts of the conduction system.
Excessive trabeculation of the left ventricle is seen in left ventricular non-compaction and also, to a lesser degree, as a benign adaptation in some athletes, which can make diagnosis difficult. Coarse trabeculation is one of the features used to identify the right ventricle. Clots can lodge among trabeculae near the apex after a heart attack.
A cardiomyopathy with a spongy, heavily trabeculated left ventricular wall. It may cause heart failure, arrhythmias and clots.
Clot forming among trabeculae of a poorly moving apex, usually after anterior myocardial infarction. It can cause stroke.
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