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IJAR.2017.174

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Type of Article:  Original Research

Volume 5; Issue 2.1 (April 2017)

Page No.: 3771-3776

DOI: https://dx.doi.org/10.16965/ijar.2017.174

ARTERY OF HAAS- ITS ORIGIN AND COURSE: A CLINICAL PERSPECTIVE

Vidyashambhava Pare *1, Harsha C.R.2, Roopa Kulkarni 3, Sheela G. Nayak 4.

*1 Professor and Head, Department of Anatomy, K.V.G. Medical College and Hospital, Kurunjibagh, Sullia, Dakshina Kannada, India.

2 Assistant Professor, Department of Anatomy, K.V.G. Medical College and Hospital, Kurunjibagh, Sullia, Dakshina Kannada, India.

3 Principal and Professor of Anatomy, K.V.G. Medical College and Hospital, Kurunjibagh, Sullia, Dakshina Kannada, India.

4 Dean (Academics), K.V.G. Medical College and Hospital, Kurunjibagh, Sullia, Dakshina Kannada, India.

Correspondence address: Dr. V.S. Pare, Professor & Head, Department of Anatomy, K.V.G. Medical College & Hospital, Sullia, Dakshina Kannada-574327, India. Mobile: 9448460498, 9901730398.  E-Mail: vs_pare@yahoo.co.in

ABSTRACT:

Introduction: Human heart is the organ which supplies blood to all tissues. But the heart itself requires proper nutrition to conduct impulses for the contraction of the heart normally. For the efficient functioning of the conducting system, the nutrition to it is essential. One of the components of the cardiac conducting system is atrioventricular node. The artery to the atrioventricular node, also called as artery of Hass which arises from the right coronary artery in majority of cases. In some cases it arises from the left circumflex artery. Apart from the origin, the angle that the artery makes with its parent artery at the site of origin is clinically important, as this angle can determine the amount of circulation and nourishment.

Materials and Methods: Sixty heart specimens obtained from the Department of Anatomy, Mysore Medical College, Mysore, over a period of two years, were studied by dissection method (37 hearts), corrosion cast (16 hearts), and arteriography (7 hearts).

Observation and Results: The origin and the angle at the origin with parent artery were studied. In 80% of hearts the atrioventricular nodal artery arose from right coronary artery, in 8.3% of cases it arose from left circumflex artery. In 6.6% cases it arose from both right coronary and left circumflex arteries. In 5% of cases there was absence of a separate atrioventricular nodal artery.   The angle it made with the parent trunk was observed in 57 hearts. In 66.1% of cases the artery was making obtuse angle, in 30.5% of cases it was at right angles and in 03.3% of cases it was making an acute angle at the site of origin from the parent trunk. There were two atrioventricular nodal arteries arising from right coronary artery which anastomosed with each other.

Conclusion: The atrioventricular nodal artery is the main nourishing channel for the atrioventricular node of the conducting system of heart. The variations in origin, course and the angle it makes with the parent trunk at its origin, play an important role in the functioning of heart. No references were available about the angle of atrioventricular nodal artery at its origin from the parent trunk, which is the original work.

KEY WORDS: Atrioventricular Node, Atrioventricular Nodal Artery, Artery Of Haas, Conducting System, Coronary Arteries.

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Cite this article: Vidyashambhava Pare, Harsha C.R., Roopa Kulkarni, Sheela G. Nayak. ARTERY OF HAAS- ITS ORIGIN AND COURSE: A CLINICAL PERSPECTIVE. Int J Anat Res 2017;5(2.1):3771-3776. DOI: 10.16965/ijar.2017.174