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Updated: Jun 16, 2026
Analysis of Coronary Vessels in Cleared Embryonic Hearts
Published on: December 7, 2016
Origins of the coronary arteries and their significance
Subhash D Joshi1, Sharda S Joshi, Sunita Arvind Athavale
1Anatomy Department, Rural Medical College, Loni, dist Ahmednagar - Maharashtra/Indian.
Insights
This study details normal coronary artery ostia anatomy in Indian subjects. Understanding these variations is crucial for diagnosing potential cardiac anomalies and guiding interventions like angiography.
Area of Science:
- Cardiovascular Anatomy
- Human Anatomy
- Medical Imaging
Background:
- Anomalous coronary artery origins can lead to severe symptoms, including sudden death during physical exertion.
- Cadaveric studies of normal coronary variants are essential for identifying anomalies and assessing screening efficacy.
Purpose of the Study:
- To document the typical and variant anatomy of coronary artery ostia in an Indian population.
- To provide a reference for interpreting coronary artery variations.
Main Methods:
- Dissection of 105 human heart specimens.
- Observation of ostia number, position within aortic sinuses, and deviations.
- Measurement of ostia and cusp heights relative to the sinus base.
Main Results:
- No coronary ostia were found in the pulmonary or non-coronary sinuses.
- Aortic sinuses exhibited 2-5 ostia, predominantly in the anterior sinus; multiple ostia were common.
- Most ostia were below the sinotubular ridge (89%) and at/above cusp margins (84%).
- Left coronary ostia were typically central (80%); right coronary ostia often shifted to the right posterior sinus (59%).
Conclusions:
- Coronary ostia are typically located within the sinus, above cusps, and below the sinotubular ridge.
- Normal variants such as multiple ostia, positional shifts, and slit-like ostia can complicate imaging and procedures.
- Accurate anatomical knowledge aids in interpreting coronary angiography, angioplasty, and coronary artery bypass grafting procedures.
Objective:
To describe the normal and variant anatomy of the coronary artery ostia in Indian subjects.
Introduction:
Anomalous coronary origins may cause potentially dangerous symptoms, and even sudden death during strenuous activity. A cadaveric study in an unsuspected population provides a basis for understanding the normal variants, which may facilitate determination of the prevalence of anomalies and evaluation of the value of screening for such anomalies.
Methods:
One hundred and five heart specimens were dissected. The number of ostia and their positions within the respective sinuses were observed. Vertical and circumferential deviations of the ostia were observed. The heights of the cusps and the ostia from the bottom of the sinus were measured.
Results:
No openings were present in the pulmonary artery or the non-coronary sinus. The number of openings in the aortic sinuses varied from 2-5 in the present series; multiple ostia were mostly seen in the anterior sinus. The majority of the ostia lay below the sinutubular ridge (89%) and at or above the level of the upper margin of the cusps (84%). Left ostial openings were mainly centrally located (80%), whereas the right coronary ostia were often shifted towards the right posterior aortic sinus (59%).
Discussion:
The preferential location of the ostia was within the sinus and above the cusps, but below the sinutubular ridge. On occasion, normal variants like multiple ostia, vertical or circumferential shift in the position, and slit-like ostia may create confusion in interpreting the images and pose a difficulty during procedures like angiography, angioplasty, and coronary artery bypass grafting.
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