ヒス束

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.
概要
表記・識別
ラテン語	fasciculus atrioventricularis
MeSH	D002036
TA	A12.1.06.005
FMA	9484
解剖学用語 [ウィキデータを表示]

ヒス束（ひすそく、英: bundle of His(BH)His bundle (HB)は、刺激伝導に特化した心筋細胞の集まりである。

心臓内の刺激伝導系の一部で、房室接合部に続く。ここから左側の膜性中隔部で右脚と左脚とに分かれる。

役割

房室結節（心房と心室の間）からの刺激を脚を介して束状枝の頂点まで伝達する。次に、プルキンエ繊維を介し、心室に刺激を伝える。この刺激によって心室の心筋を一定の間隔で収縮させる。

参考

• 日本心臓財団

文献

• “Long-term His-bundle pacing and cardiac function”. Circulation 101 (8): 836–37. (February 2000). doi:10.1161/01.cir.101.8.836. PMID 10694517. 
• “Transvenous cryoablation of the bundle of His”. Pacing and Clinical Electrophysiology 14 (4 Pt 1): 504–10. (April 1991). doi:10.1111/j.1540-8159.1991.tb02821.x. PMID 1710054. 
• “Surface recording of electrical activity from the region of the bundle of His”. The American Journal of Cardiology 33 (3): 384–89. (March 1974). doi:10.1016/0002-9149(74)90320-8. PMID 4591112. 
• Kistin AD (May 1949). “Observations on the anatomy of the atrioventricular bundle (bundle of His) and the question of other muscular atrioventricular connections in normal human hearts”. American Heart Journal 37 (6): 847–67. doi:10.1016/s0002-8703(49)90937-0. PMID 18119894. 

外部リンク

• Atlas image: ht_rt_vent at the University of Michigan Health System - "Right atrioventricular bundle branch, anterior view"
• thoraxlesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (thoraxheartinternalner)
• Healthy Heart