RESUMO
An increase in QT dispersion (QTd) is associated with myocardial ischemia and may serve as a marker of ischemia and ventricular arrhythmia. We studied the effect of early reperfusion with rheolytic thrombectomy using an angiojet catheter (Possis, Minneapolis, MN) on QTd in 12 patients who presented with acute myocardial infarction. QTd and QT dispersion, rate-corrected for RR interval, were significantly reduced from 57 +/- 16 and 68 +/- 13 msec before reperfusion to 34 +/- 16 and 44 +/- 19 msec after reperfusion respectively (mean +/- SD; P < 0.002 and P < 0.0008, respectively). Successful reperfusion with rheolytic thrombectomy reduces QTd and may confer electrical stability to vulnerable myocardium. Reduction in indexes of repolarization inhomogeneity with reperfusion may serve as a noninvasive marker of coronary patency.
Assuntos
Angioplastia Coronária com Balão/métodos , Eletrocardiografia , Infarto do Miocárdio/diagnóstico , Infarto do Miocárdio/terapia , Trombectomia/métodos , Idoso , Cateterismo Cardíaco , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Reperfusão Miocárdica/métodos , Estudos Retrospectivos , Sensibilidade e Especificidade , Resultado do TratamentoRESUMO
In 111 patients with left ventricular ejection fraction < or =30% who required hospitalization for heart failure, we examined the association between outpatient dose of diuretic agents and all-cause mortality. In comparison to patients who were not on treatment with diuretics prior to hospitalization, patients being treated with 'low' doses of diuretics (<80 mg/day of furosemide) and those being treated with 'high' doses of diuretics (> or =80 mg/day of furosemide) were more likely to die during follow-up after adjustment for other clinical parameters (adjusted relative risks, RR, 3.1 and 4.6).
Assuntos
Diuréticos/administração & dosagem , Furosemida/administração & dosagem , Insuficiência Cardíaca/tratamento farmacológico , Idoso , Relação Dose-Resposta a Droga , Feminino , Insuficiência Cardíaca/mortalidade , Insuficiência Cardíaca/fisiopatologia , Humanos , Masculino , Pacientes Ambulatoriais , Estudos Retrospectivos , Fatores de Risco , Volume Sistólico , Taxa de Sobrevida , Resultado do TratamentoRESUMO
Ultrasonography was performed on eight patients with confirmed amebic colitis to determine whether it is possible to differentiate amebic colitis from Crohn's disease or ulcerative colitis. Bowel wall thickening was similar to that found in Crohn's disease and ulcerative colitis; thus, other tests should be used to confirm sonographic findings. However, ultrasonographic findings of thickened bowel wall should suggest amebic colitis in areas endemic for amebiasis.