OBJECTIVES: Evaluate patients, before and after surgery, with change of aortic valve for a small prosthesis (19 and 21 mm), in order to check the viability of their use. MATERIALS AND METHODS: In our Service, from January 1989 to November 1997, 1497 patients had the aortic valve changed. The small prostheses were used in 100 patients. Females predominated (74%) in this group, with average body surface of 1.57 m2. The biological prosthesis were used in 33% of the cases. Postoperatively, these patients were followed by Doppler echocardiography and clinical evaluation. RESULTS: This group of patients presented improvement in functional class; 86.3% of them are in class I, and the others in class II. The VE-Ao gradient was significantly reduced, with a postoperative average of 30.9 mmHg. In 64% of the cases an associated procedure was necessary: the most common was mitral valve replacement. The survival rate of this group, in 101 months of follow-up, is 83%. CONCLUSION: Considering the clinical improvement in these patients, most are asymptomatic and with an acceptable trans-prosthetic gradient, we fell that the small prosthesis can be used safely when the relationship between the size of the prosthesis and the patient’s body surface area is appropriate.
Heart valve prosthesis; Heart valve prosthesis; Aortic valve; Mitral valve
