Morphological and morphometric parameters of coronary arteries in human foetal hearts

Author : K. Jyothirmayia, Subhadra Devi Velichety, K. Thyagaraju, S. Havila Hasinid, Ch.Jaipale, Md. Reshma

Introduction: Heart is a hollow muscular organ composed primarily of cardiac muscle tissue that continuously contracts and relaxes. Heart receives blood from right and left coronary arteries. Materials and Methods: In the present study 50 hearts from aborted foetuses (13 36 wks of gestational age) were collected. The foetuses were categorized in to two groups of 13 -24 weeks (Group I) and 25- 36 weeks (Group II) gestational age range. The heart specimens were observed for origin, course and branching pattern of coronary arteries, segment wise lengths of coronary arteries, coronary dominance, presence of third coronary artery and myocardial bridges. The mean lengths of coronary arteries were compared between 1st, 2nd and 3rd segments. Results: There is a significant increase in the lengths of 1st, 2nd and 3rd segments from group-I to group-II. The posterior interventricular artery was arising from right coronary artery in 56%, left coronary artery in 8% and from both arteries in 6%. The frequency of occurrence of third coronary or right conus artery arising separately from anterior aortic sinus is 2%. Myocardial bridges are present in 9 hearts and among these 4 bridges are observed in the course of right coronary artery and 5 bridges on left anterior descending branch. Conclusion: The data presented in this study provide potentially useful information for the preoperative evaluation of the newborn and may have clinical implication in sudden fetal death.

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