The Spanish Society of Cardiovascular Surgery Registry of 1994 includes data from 44 hospitals. Within this year a total of 25,385 patients were operated on, with an average of 577 operations/ center. Fourteen thousand one hundred and fifteen of these were cardiac operations under extracorporeal circulation, with an average of 320 cases/hospital. The number of coronary surgeries was greater to that of valvular procedures (6,660 vs 5,386). The average of coronary graft/patient was 2.67. The 67.6% of these were arterial grafts. The hospital mortality was 7.8%, 5.9%, 6.6%, 7.0% and 4.1% for 1, 2, 3, 4 and 5 or more grafts, respectively. The number of valvular prothesis implanted was 6,243 and 80.7% of these were mechanical. There were 2,274 (58.2%) patients operated on aortic valvular surgery and 1,582 by mitral surgery, with a mortality of 5.9 and 8.6%, respectively. The number of patients operated on for congenital cardiac defects was 1,993 (1,367 open heart surgeries and 626 closed). There were 5,023 operations by peripheral vascular surgery. The number of aneurysms operated on during this year was 506.