RESUMO
We study the phonocardiogram, M mode, two-dimensional and Doppler pulsed echocardiogram of 30 patients, who underwent implantation of a bovine pericardial bioprosthesis manufactured at the Instituto Nacional de Cardiología Ignacio Chávez. We describe 26 patients with prosthesis in mitral position, 22 females and 4 males, with age between 19 to 60 years. After surgery, 22 were in functional I and 2 in class II of the New York Heart Association Criteria. Two patients (6.6%) died of extracardiac complications. Phonocardiogram: Mitral prosthesis closing click (MPCC) were recorded at all, the interval Q wave-MPCC was of 0.09 +/- 0.02 sec. The interval second sound-mitral prosthesis opening click (S2-MPOC) measured 0.10 +/- 0.01 sec. Mid-diastolic murmur were recorded in 8 patients (30.7%). The O-F slope of the apexcardiogram was of 82 +/- 40 mm/sec. Ten patients had tricuspid insufficiency. Echocardiogram: The D-E velocity of mitral prosthesis opening was of 318 +/- 99 mm/sec and the E-F slope velocity of 15 +/- 6.2 mm/sec. All patients except one showed paradoxical motion of the intraventricular septum. The prosthesis stents distance was of 14.1 +/- 2 mm, the internal diameter of 17.8 +/- 2.9 mm and the valvular area was calculated in 2.5 +/- 0.08 cm2. The flow velocity/diameter was 62.6 +/- 26.8 cm/sec/mm and the flow velocity/opening area of 52.5 +/- 26.1 cm/sec/cm2.(ABSTRACT TRUNCATED AT 250 WORDS)