Bundle of His
The bundle of His (BH): 58 or His bundle (HB): 232 (/hɪs/ "hiss") is a collection of heart muscle cells specialized for electrical conduction. As part of the electrical conduction system of the heart, it transmits the electrical impulses from the atrioventricular node (located between the atria and the ventricles) to the point of the apex of the fascicular branches via the bundle branches. The fascicular branches then lead to the Purkinje fibers, which provide electrical conduction to the ventricles, causing the cardiac muscle of the ventricles to contract at a paced interval.
| Bundle of His | |
|---|---|
Isolated heart conduction system showing bundle of His | |
Heart cut-away showing the bundle of His. Schematic representation of the atrioventricular bundle of His. The bundle, represented in red, originates near the orifice of the coronary sinus, undergoes slight enlargement to form the AV node. The AV node tapers down into the bundle of His, which passes into the ventricular septum and divides into two bundle branches, the left and right bundles. Sometimes the 'left and right bundles of His' are called Purkyně or Purkinje fibers. The ultimate distribution cannot be completely shown in this diagram. | |
| Details | |
| Identifiers | |
| Latin | fasciculus atrioventricularis |
| MeSH | D002036 |
| TA98 | A12.1.06.005 |
| TA2 | 3955 |
| FMA | 9484 |
| Anatomical terminology | |
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