Anatomical Study of the Variations of Sinuatrial and Atrioventricular Nodal Arteries in Human Heart
Abstract
Introduction: The conducting system of the heart is supplied mainly by Sinuatrial nodal artery and Atrioventricular nodal artery. Generally, in 60% subjects, Sinuatrial nodal artery arise from Right Coronary Artery and in remaining 40% it arise from Left circumflex branch of Left Coronary Artery. Similarly, the atrioventricular nodal artery arises from Right Coronary Artery in 80% and from Left Coronary Artery in 20% subjects. The aim of the present study is to observe the variation of Sinuatrial & Atrioventricularnodal arteries in human hearts for gathering adequate information study which may be helpful for cardiovascular surgeries.
Material and Method: Present study included 50 human hearts. Heart specimens obtained from department of Anatomy of Netaji Subhash Chandra Bose medical College, Jabalpur, India. The course of Sinuatrial nodal and Atrioventricular nodal arteries were traced by micro dissection under water method.
Results: In the present study Sinuatrial nodal artery arose from RCA in 52% cases, from LCA in 24% cases and in 24% cases it arose from both RCA & LCA. Likewise, Atrioventricular nodal artery arose from RCA in 88% cases and in 12% cases it arose from LCA.
Conclusion: Considering the necessity of Open heart surgeries it becomes necessary to have a deep knowledge of origin and variation of Sinuatrial nodal and Atrioventricular nodal arteries. Knowledge of variation in the blood supply of conducting system may help cardiac surgeons in taking due cautions during various cardiac surgeries, atrial surgical interventions and surgery related to certain valvular disorder and congenital malformation.
Downloads
References
2. B Pejkovi´C1, I Krajnc2, F Anderhuber3 And D Košuti´C. Anatomical Aspects of the Arterial Blood Supply to the Sinuatrial and Atrioventricular Nodes of the Human Heart.J Int Med Res. 2008; 36: 691 – 698. [PubMed]
3. Standring S. The anatomical basis of clinical practice. 39th ed. Philadelphia: Elsevier Churchill Livingstone. 2005:1014-18.
4. Hurst, Willis J. The Heart. 7th edition Vol. I, Part I, Mc-Graw Hill, New york, Information sevices company. 1990; p-14-35.
5. Futami C, Tanuma K, Tanuma Y, Saito T. The arterial blood supply of the conducting system in normal human hearts. [PubMed]
6. Baroldi G, Mantero O, Scomazzoni G. The collaterals of the coronary arteries in normal and pathologic heart. Circulation Research. 1956; 4:223-9. [PubMed]
7. James TN. Anatomy of the coronary arteries. Hoeber, New York. Circulation. 1965;32:1020-33. [PubMed]
8. Kalpana R. A study of principal branches of coronary arteries in human. J anat soci India. 2003 Dec; 52(2):137-40.
9. Venkateshu KV. A study of arterial supply of SA node and AV node. Anat Karnataka. 2006 July; 2(2):21-24.
10. Anjali S Sabnis, Nazmeen N Silotry. Anatomical variations of nodal arteries in human hearts. Journal of Evolution of Medical and Dental Sciences. 2012 Oct; 1(4):482.
11. Schlesinger MJ, Zoll PM, Wessler S. The conus artery: a third coronary artery. Am Heart J. 1949; 38:823-36. [PubMed]
12. Sow ML, Ndoye JM, Lô EA. The artery of the sinuatrial node. SurgRadiol Anat. 1996;18:103-109. [PubMed]
13. James TN, Burch GE. The atrial coronary arteries in man. Circulation. 1958; 17: 90 – 98. [PubMed]
14. Duzgun Y. Anatomy & variations of arterial supply to sinuatrial node: Imaging with dual source cardiac multidetector CT angiography, Turk GogusKalpDamarCerDerg. 2010;18(4)290-292.
OAI - Open Archives Initiative
