0 an extremely dangerous medical condition in which the flow of blood to the heart is blocked by a blood clot (= a mass of blood): --
1 relating to the arteries (= thick tubes) that supply blood to the muscles of the heart: --
2 relating to the blood vessels (= tubes carrying blood) around the heart, or to the heart and diseases of the heart: --
The interventricular grooves are shallow and identifiable only by the courses of the interventricular coronary arteries.
Their classification attempts to take into account the origins and initial courses of the coronary arteries.
Categories were then further divided according to the proximal epicardial course of the three major coronary arteries.
Fistulous communications between the ventricular cavity and the coronary arteries were only seen in the cases with muscular atresia.
Within the hearts they examined, all coronary arteries arose from the facing sinuses.
The coronary sinus courses within the atrioventricular groove behind the left atrium to open into the right atrium.
In our case, the only possible drainage for the left-sided atrium was through a window from the left atrium to the coronary sinus.
The widened coronary sinus itself never bulged into die left atrium.
