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2443 ATS Open pivot bileaflet prosthesis for aortic valve replacement We report our experience with the new bileaflet prosthesis ATS Medical (ATS Medical Inc., Minneapolis) in small aortic valve size, with respect to the AP series particularly studied for the small diameters (sizes n° 18,20,22). We prospectively studied 93 consecutive patients who implanted a small ATS aortic valve (n°<23 mm.), aged 45-80 years (mean 68 yrs). Transvalvular gradients were determined by transthoracic echocardiography. Patients were followed for 24 to 60 months. We had one (1.07%) hospital death non valverelated. There were no thromboembolic events, no valve-related complications and no deaths at follow-up. Echocardiographic data revealed excellent hemodynamic in all cases, with low transvalvular pressure gradients and absence of significant regurgitation. In particular, hemodynamic results were excellent in the AP series n° 18,20,22 with mean transvalvular gradients absolutely acceptable ranging from 21 mmHg in the n° 18 size to 15 mmHg in the n° 22 We conclude that ATS bileaflet valve has excellent hemodynamic characteristics, in particular the AP series, and good safety respect to late complications with a target therapeutic INR of 2.0 to 2.5.

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2012-08-27   |   261 visitas   |   Evalua este artículo 0 valoraciones

Vol. 30 Núm.2. Abril-Junio 2001 Pags. 387-390 Rev Fed Arg Cardiol 2001; 30(2)