Adaptações fisiológicas precoces e tardias após valvotomia mitral por cateter balão
PURPOSE: To evaluate the early and late cardiorespiratory responses after balloon mitral valvuloplasty. METHODS: Nine female patients aged 35±9 years, with mitral stenosis, in class II or III (NYHA) underwent upright ergoespirometric test, resting electrocardiogram and echocardiogram before, 3 to 5...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1998 |
| País: | Brasil |
| Institución: | Universidade Federal de São Paulo (UNIFESP) |
| Repositorio: | Repositório Institucional da UNIFESP |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.unifesp.br:11600/582 |
| Acceso en línea: | http://dx.doi.org/10.1590/S0066-782X1998000200003 http://repositorio.unifesp.br/handle/11600/582 |
| Access Level: | acceso abierto |
| Palabra clave: | mitral stenosis mitral valvuloplasty exercise test echocardiogram estenose mitral valvoplastia mitral teste ergométrico ecocardiograma |
| Sumario: | PURPOSE: To evaluate the early and late cardiorespiratory responses after balloon mitral valvuloplasty. METHODS: Nine female patients aged 35±9 years, with mitral stenosis, in class II or III (NYHA) underwent upright ergoespirometric test, resting electrocardiogram and echocardiogram before, 3 to 5 days (early evaluation) and 8 to 12 months (late evaluation) after mitral valvuloplasty. All patients were treated with digitalis and diuretics. RESULTS: During late evaluation, 44% patients were in class II and 56% were in class I (NYHA). The resting heart rate decreased (87±11bpm vs 85±7bpm vs 75±9bpm) and the number of steps increased (4±1 steps vs 5±2 steps vs 6±1 steps); the peak oxygen uptake improved only in the late evaluation (16±3mL/kg/min vs 18±4mL/kg/min vs 22±7mL/kg/min). The anaerobic threshold, minute ventilation (VE) and ventilatory equivalent for oxygen showed no change. The heart rate (1st step: 124±18bpm vs 112±13bpm vs 87±15bpm), O2 uptake (1st step: 10±2mL/kg/min vs 8±2mL/kg/min vs 8±2mL/kg/min) and VE decreased during submaximal exercise in early and late phases. The mitral valve area decreased in the late evaluation (0.94cm² vs 1.66cm² vs 1.20cm²). CONCLUSION: Although partial restenosis tended to occur in these patients, they improved the functional class and cardiorespiratory performance and cardiocirculatory load during submaximal exercise. |
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