RESUMEN
Recent data from our laboratory have shown that patients with the indeterminate form of Chagas' disease can have impairment of left ventricular contractility, as evaluated by the slope of the left ventricle end-systolic pressure-dimension relationship. We also showed that Chagas' disease patients with minimal baseline wall motion abnormalities detected by two-dimensional echocardiography have more intense contractility impairment when compared to patients with the indeterminate form of the disease without this abnormality. The prognostic implications of these findings have not been established. We evaluated 59 patients (37-76 years, mean = 55 years) with different clinical forms of Chagas' disease, who had normal left ventricular global systolic function at baseline (57.6 +/- 6.9%) and who had at least one additional echo during clinical follow-up (0.4-17.6; mean 4.6 years). Group 1 consisted of 14 patients with minor baseline left ventricle wall motion abnormalities and group 2 consisted of 45 patients without these abnormalities. During follow-up, global left ventricle systolic function deterioration was observed in 10 group 1 patients (71.4%) and in only 10 group 2 patients (22.2%; P < 0.005). Age and duration of follow-up were not independent determinants of left ventricular function deterioration in these patients. The present data indicate that mild segmental left ventricular wall motion abnormalities are associated with worsening of systolic function in Chagas' disease patients who have normal baseline global systolic performance.
Asunto(s)
Enfermedad de Chagas/fisiopatología , Contracción Miocárdica/fisiología , Disfunción Ventricular Izquierda/fisiopatología , Adulto , Anciano , Cardiomiopatía Chagásica/diagnóstico por imagen , Cardiomiopatía Chagásica/fisiopatología , Enfermedad Crónica , Ecocardiografía , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Índice de Severidad de la Enfermedad , Disfunción Ventricular Izquierda/diagnóstico por imagenRESUMEN
Recent data from our laboratory have shown that patients with the indeterminate form of Chagas' disease can have impairment of left ventricular contractility, as evaluated by the slope of the left ventricle end-systolic pressure-dimension relationship. We also showed that Chagas' disease patients with minimal baseline wall motion abnormalities detected by two-dimensional echocardiography have more intense contractility impairment when compared to patients with the indeterminate form of the disease without this abnormality. The prognostic implications of these findings have not been established. We evaluated 59 patients (37-76 years, mean = 55 years) with different clinical forms of Chagas' disease, who had normal left ventricular global systolic function at baseline (57.6 ± 6.9 percent) and who had at least one additional echo during clinical follow-up (0.4-17.6; mean 4.6 years). Group 1 consisted of 14 patients with minor baseline left ventricle wall motion abnormalities and group 2 consisted of 45 patients without these abnormalities. During follow-up, global left ventricle systolic function deterioration was observed in 10 group 1 patients (71.4 percent) and in only 10 group 2 patients (22.2 percent; P < 0.005). Age and duration of follow-up were not independent determinants of left ventricular function deterioration in these patients. The present data indicate that mild segmental left ventricular wall motion abnormalities are associated with worsening of systolic function in Chagas' disease patients who have normal baseline global systolic performance.
Asunto(s)
Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enfermedad de Chagas/fisiopatología , Contracción Miocárdica/fisiología , Disfunción Ventricular Izquierda/fisiopatología , Enfermedad Crónica , Cardiomiopatía Chagásica/fisiopatología , Cardiomiopatía Chagásica , Ecocardiografía , Estudios de Seguimiento , Pronóstico , Índice de Severidad de la Enfermedad , Disfunción Ventricular IzquierdaRESUMEN
PURPOSE: To assess the clinical, angiographic and early follow-up findings of young patients suffering an acute myocardial infarction, in comparison with older patients with infarction, in the thrombolytic era. METHODS: A retrospective analysis of the medical records of 46 patients < 40 years-old (group I) at the time of an acute myocardial infarction was compared with that of 46 older patients, randomly selected, presenting with this syndrome between february, 1991 and february, 1996 (group II). In both groups a comparison was conducted regarding the proportions of gender, risk factors, type of infarction (Q vs non-Q), left ventricular function, coronary anatomy and early mortality (1 month). The medical treatment was comparable for both groups, including the utilization of thrombolytics. RESULTS: The groups were discriminated only by: higher prevalence of smoking, of angiographically normal coronary arteries, and of non-critical (< 75% reduction of luminal diameter) coronary stenosis in group I; in the older group a higher proportion of patients had multivessel disease. Although not reaching statistical significance, a trend was observed to a more benign early course of the infarction in the patients less than < 40 years-old. CONCLUSION: The present findings are similar to those described in the pre-thrombolytic era, for young patients suffering an acute myocardial infarction.