A Study Of Posterior Interventricular Artery In Adult Human Cadaveric Hearts

Background: Posterior interventricular artery (PIVA), usually a branch of right coronary artery supplies both theventricles and the posterior 1/3rd of the interventricular septum. In some cases, PIVA can also arise from the leftcoronary artery. Origin of posterior interventricular artery determines the cardiac dominance. The present studyis aimed to assess the cardiac dominance by assessing the number, origin and termination of the posteriorinterventricular artery in the human cadaveric hearts. The blood supply of the inferior myocardium depends onthe dominance. Hence the awareness of these variations plays an important role in treating the inferior wallinfarcts.Materials and Methods: This study was carried out in the Department of Anatomy, Sree Mookambika Institute ofMedical Sciences. A total of 112 adult human cadaveric hearts were collected and the parameters such as thenumber, origin and the termination of the posterior interventricular artery were noted.Results and Discussion: In the present study, the PIVA is seen in all the hearts. Out of 112 cases, the right coronarydominance was seen in 94 cases (84%), and left coronary dominance was seen in 18 cases (16%). And the levelof termination of PIVA is more, ie; 42 out of 112 specimens (37.5%) are ½ way down the PIVS.Conclusion: Coronary artery disease is one of the major causes of death in developing countries. The advanceddiagnostic and therapeutic interventional procedures necessitate the sound knowledge of the coronary arterypattern. Prognosis of inferior wall infarcts are related to coronary dominance. So the study of PIVA may behelpful in coronary artery angiography and bypass surgeries.

Evaluation of coronary dominance in pigs; a comparative study with findings in human hearts / Avaliação da dominância coronária em suínos. Estudo comparativo com os achados em corações humanos

Coronary dominance in swine has been poorly evaluated. The frequencies of each type of dominance have been described, but few details have been given as to the different expressions of each one. The aim of this study was to characterize coronary dominance in commercial breed swine. One hundred and fifty eight pig hearts were evaluated. The coronary arteries (CA) were infused with synthetic resin (Palatal 85% and Styrene15%) through the ostia after channeling. The coronary artery that gives origin to the posterior interventricular artery (PIA), and the site of termination of both the circumflex arteries (CXA), and left retroventricular branch (LRVB) were determined in order to establish the coronary dominance pattern. Right coronary dominance was found in 105 hearts (66.5%), and a balanced circulation in 53 specimens (33.5%). No dominance was observed for the left coronary artery in the hearts studied. The CXA ended on the posterior aspect of the left ventricle in 101 samples (64%) and on the crux cordis in 55 specimens (34.8%). In two specimens (1.3%) it ended as a left marginal artery. In all cases the PIA was a branch of the RCA, and was long in 105 hearts (66%), 55% of which corresponded to males and 45% to females, but this difference was not statistically significant (p=0.77). The AIA ended on the apex in 126 specimens (80%), 71 of which (56%) corresponded to males and 55 (44%) to females (p=0.74)...

A dominância coronária em suínos tem sido pouco avaliada. Descreveram-se as frequências de cada um dos tipos, mas não detalharam as diferentes expressões de cada um deles. O objetivo deste estudo foi caracterizar a dominância coronária em suínos de raças comerciais. Avaliaram-se 158 corações de suínos. As artérias coronárias (AC) foram infundidas através da canalização dos seus ostium com resina sintética (Palatal 85% e Estireno15%). Para estabelecer o tipo de dominância coronária, determinou-se de qual coronária desprendia-se a artéria interventricular posterior (AIP) e o lugar de finalização das artérias circunflexa (ACX) e do ramo retro ventricular esquerdo (RRVI). Encontrou-se dominância coronária direita em 105 corações (66%) e circulação balanceada em 53 exemplares (34%). Não foi observada a dominância coronária esquerda nos corações estudados. O calibre proximal e médio da ACD nos casos de dominância coronária direita foi de 3,84 ± 0,80 mm. Por outro lado, encontrou-se que este mesmo calibre nos corações com dominância coronária balanceada foi de 3,97 + 0,79 mm. (p=0,88). A ACX finalizou-se na face posterior do ventrículo esquerdo em 101 amostras (64%) e na crux cordis em 55 exemplares (34,8%). A AIP emergiu em todos os casos da ACD sendo comprida em 105 corações (66%) dos quais 55% correspondia a machos e 45% a fêmeas, sem que esta diferença fosse estatisticamente significativa (p=0,77). A AIA finalizou-se no ápice em 126 exemplares (80%), dos quais 71 (56%) corresponderam a machos e 55 (44%) a fêmeas (p=0,74)...

A Study of Coronary Dominance in Population of Jalgaon Region of North Maharashtra by Angiographic Method.

Introduction: The incidence of coronary artery disease is increasing now a day’s all over the world. Dominance pattern of the heart has got important clinical significance in different pathologies. So the present work is undertaken to study the dominance of coronary arteries in population of Jalgaon region of North Maharashtra, India. Aim and objectives: Aim of the present study was to determine dominance pattern of coronary arteries in Jalgaon region and to compare it with other studies. Material and Method: The subjects (n=1000) attending cardiology outpatient department (OPD) at Dr. Ulhas Patil Medical College and Hospital, Jalgaon Kh. formed the study group for this study. Invasive coronary angiography was performed by either femoral or radial route using radio-opaque dye and cineangiograms were taken in different views. Using Schlesinger’s criteria, the coronary dominance was determined Results: In 82.4% of the subjects, right dominance was noted. In 13.3% of the subjects, left dominance was noted. Balanced dominance was noted in 4.3% of the subjects studied. Conclusion: Balanced dominance is significantly less in Jalgaon region of northern Maharashtra when compared with results of most other studies. Similarly right dominance is significantly more in this area when compared with results of most other studies. So it can be concluded that every region carries its own proportions of dominance and detailed studies should be conducted for betterment of human being in each region.