has part characteristic of part of has modifier Abnormal cardiac atrium morphology Abnormal coronary sinus morphology An abnormality of the coronary sinus, which is formed by the union of the great cardiac vein and the left marginal vein and terminates in the right atrium. The coronary sinus functions to o collect deoxygenated blood from the myocardium of the heart and drain it into the right atrium. SNOMEDCT_US:253323000 Abnormality of the coronary sinus Fyler:2840 UMLS:C0344680 morphology abnormal coronary sinus