005 Citation: Nagpal H, Sharma PK, Chopra J, Patel R (2018) Aortic Arch Morphometry and its clinical implication –A computed tomography study. Arch Anat Physiol 3(1): 005-008. DOI: http://dx.doi.org/10.17352/aap.000011 http://dx.doi.org/10.17352/aap DOI: 2640-7957 ISSN: Abstract Aortic arch is a challenging site for endovascular repair. In the present study morphometric details of aortic arch such as aortic arch angle, aortic arch type and angle of aortic arch curvature were observed with an objective to provide normogram of these parameters for north indian population as the literature is lacking with these values. These parameters were corelated with age and gender also. It is a pilot study of its own kind. Research Article Aortic Arch Morphometry and its clinical implication –A computed tomography study Hema Nagpal 1 *, PK Sharma 2 , Jyoti Chopra 3 and Rajni Patel 4 1 Assistant professor, Department of Anatomy, SIMS,Hapur, UP, India 2 Professor and Head, Department of Anatomy, ERA Medical College, Lucknow, UP, India 3 Professor, Department of Anatomy, King George’s Medical University, Lucknow, UP, India 4 Associate professor, dept of anatomy, SIMS, HAPUR, UP, India Received: 19 July, 2018 Accepted: 31 July, 2018 Published: 01 August, 2018 *Corresponding author: Hema Nagpal, Assistant professor, Department of Anatomy, SIMS, Hapur, UP, India, E-mail: Keywords: Aortic Arch; Morphometry; Computed tomography https://www.peertechz.com Introduction Aorta is the main arterial trunk that delivers oxygenated blood from the left ventricle of the heart to the tissues of the body. The major branches of arch of aorta are the great ways for blood supply to the head and upper limb, and are of particular interest in clinical angiography. The most common branching pattern of the aortic arch in humans comprises of three great vessels; first, the brachiocephalic trunk then the left common carotid artery and finally the left subclavian artery. The aortic arch and its branches is important anatomical structure for both surgeons and interventionalists. Aneurysms and dissections of the aortic arch need to be treated with complex surgical procedures such as deep hypothermic circulatory arrest and selective antegrade cerebral perfusion. These procedures evolved to enable replacement of the aortic arch and reconstruction of its continuity to the aorta with less risk of ischemic and embolic cerebral damage. For this the knowledge of morphometric data of the aortic arch can be of help for conceiving, designing and optimizing all types of diagnostic and therapeutic interventions involving the aortic arch and its branches. Materials and Methods The present study was conducted on 55 patients, including 31 males and2 4females. The patients underwent computed tomographic angiographic scan for various indications, were included in the study. Age of subjects ranged from 3 months to 75 years across 5 age groups. Written informed consent from the patients was obtained. The images of patients with previous history of allergy to contrast agent, renal insufficiency,distortion of anatomy of arch of aorta due to any pathology were excluded from this study. A region of interest was drawn on the aorta at the level of the diaphragm. After an appropriate delay to allow passage of the contrast agent into the renal arterial circulation, a series of thin cuts (0.9mm) were obtained throughout the aorta. Morphometry of arch of aorta were studied in axial, multiplanar reconstructions (MPR) images, and in volume rendered images. The parameters observed were: 1. Aortic arch angle- It was defined as the angle between a line connecting the highest point of the aortic arch and a mid-luminar point of the ascending and descending aorta at the height of the bifurcation of the pulmonary trunk in the parasagittal plane [1] (Figure 1). Figure 1: Parasaggital MPR showing measurment of aortic arch angle .a= highest point of the aortic arch,b and c- mid-luminar point of the ascending and descending aorta at the height of the bifurcation of the pulmonary trunk.