Unusual Branching Pattern of Left Coronary Artery- Case Report

Case Report

Austin J Anat. 2015; 2(3): 1039.

Unusual Branching Pattern of Left Coronary Artery- Case Report

Rajani S*

Department of Anatomy, All India Institute of Medical Sciences, India

*Corresponding author: Rajani Singh, Department of anatomy, All India Institute of Medical Sciences, India

Received: September 05, 2015; Accepted: September 15, 2015; Published: November 02, 2015


During dissection of thorax of an 80 year old Female cadaver for undergraduate MBBS students, a heart was detected to have variant branching pattern of left coronary artery. Typically left coronary artery bifurcates into anterior interventricular artery and circumflex artery which continues in the left coronary sulcus. But the present case left coronary artery splitted into anterior interventricular artery and common trunk. The anterior interventricular artery gave diagonal/ventricular branches in the left as usual but ectopically generated a ventricular minor artery and a luminal artery. The luminal artery entered the infundibulum of right ventricle and ended near the septal papillary muscle. Common trunk divided into circumflex artery and anomalous diagonal artery. The case is reported for its virgin occurrence.

The knowledge of new configuration of branches of left coronary artery will be of paramount importance to cardiologists in cardiac surgery and to anatomists for new variant.

Keywords: Circumflex artery; Infundibulum of right ventricle; Left coronary artery; Luminal artery; Ventricle minimus artery


LCA: Left Coronary Artery; RCA: Right Coronary Artery; AIV: Anterior Interventricular Artery; Cx: Circumflex


Heart is supplied by two coronary arteries, Left Coronary Artery (LCA) and Right Coronary Artery (RCA). Variations in the branching pattern of LCA have been described by many authors [1, 2].

Typically LCA gives Anterior Interventricular Artery (AIV) and main artery continues as circumflex artery in left anterior coronary sulcus. Anterior interventricular artery from its left side gives many sub-parallel diagonal and ventricular branches to supply the left ventricle. But in the present cadaveric study, two arteries named as ventricular minor artery and luminal artery ectopically arise from right side of AIV. Ventricular minor artery enters the myocardium and ends there. Luminal artery enters into the lumen of right ventricle of heart.

In addition to these new arteries, a diagonal artery arises from common trunk along with circumflex artery. These variations are not reported in literature as far as known to the author and may affect the pathophysiology of heart. So the knowledge of these variants may be of immense use to clinicians, imagery experts and anatomists. Therefore the case is reported.

Case Report

During dissection of thorax of an eighty year old female cadaver, the heart was found to have variant configuration of branching pattern of LCA as well as AIV as described below-

LCA after travelling 1.5 cm from its origin gave a common trunk of 1.00 cm and AIV (Figure 2). Common trunk bifurcated into Circumflex (Cx) and diagonal arteries. Cx artery after travelling 2.00 cm in the left anterior coronary sulcus gave marginal artery and ended aberrantly at the left border of heart.