Even if thrombosis is present in the coronary sinus, which of the following cardiac veins might remain normal in diameter
B. Anterior cardiac vein
C.Small cardiac vein
D. Oblique cardiac vein
Ans. B. Anterior
cardiac vein
-
Anterior cardiac veins drain directly into the right atrium and not the
coronary sinus, hence are spared in this particular patient.
-
The coronary sinus is the main drainage channel of venous blood from the
myocardium. It is the main derivative of the left horn of the sinus venosus of
fetal life. It is situated within the atrioventricular groove coronary sulcus. on the posterior surface of the heart between
the left atrium and ventricle.
-
It commences towards the left of the groove at the point at which it receives
the oblique vein of the left atrium. It passes to the right and inferiorly to
terminate by draining into the right atrium at the coronary sinus orifice.
-
The coronary sinus is drained into by a number of smaller veins; typically,
from left to right along its course, the:
Great
cardiac vein* from left side.
Oblique
vein of the left atrium from superior side.
Posterior
vein of the left ventricle
Middle
cardiac vein** from inferior side.
Small
cardiac vein from right side.
The
great cardiac vein is the largest lumen wise.
of the veins draining into the coronary sinus from the myocardium. It
commences near to the apex of the heart in the anterior part of the
interventricular groove. It passes superiorly in the company of the anterior
interventricular artery LAD. .
-At
the junction of the interventricular groove with the atrioventricular groove,
it enters the latter and passes to the left in the company of the circumflex
artery. It passes over the left border of the heart within the atrioventricular
groove to merge with the left end of the coronary sinus.
-
The great cardiac vein drains the territory supplied by the left coronary
artery e.g. the left atrium and ventricle.
