Electrocardiographic repolarization parameters are potential markers of arrhythmogenic risk and have not been evaluated in @entity1526 . The aim of this report was to investigate their associations with LV systolic function assessed by two-dimensional echocardiography. In a cross-sectional study involving 738 adult outpatients in the chronic phase of @entity1526 , maximal QTc and T wave peak-to-end (TpTe) intervals, and @entity1162 , QTapex (QTa), IT and TpTe interval dispersions, and variation coefficients were measured and calculated from 12-lead standard ECGs. Clinical, radiological, ECG, and echocardiographic data were recorded. In bivariate statistical analysis, all repolarization parameters were significantly increased in @entity1 with moderate or severe LV @entity299 , and these @entity1 showed more clinical, radiologic, and ECG abnormalities. Receiver operating characteristic curve analysis demonstrated that isolatedly QTd had the best predictive performance for @entity409 , with an 80% specificity and 67% sensitivity for values >60 ms in the subgroup of chagasic @entity1 with abnormal ECGs and no @entity712 . Multivariate logistic regression selected, as the best predictive model for @entity409 in this subgroup of @entity1 , the presence of @entity1283 on chest X ray (OR 14.06, 95% CI, 5.54-35.71), QTd >60 ms (OR 9.35, 95% CI, 4.01-21.81), male gender (OR 7.70, 95% CI, 2.98-19.91) and the presence of frequent @entity1540 ( @entity1540 ) on ECG (OR 4.06, 95% CI, 1.65-9.97). This model showed 90% specificity and 71% sensitivity. In conclusion, QTd was associated to LV systolic function and could be used to predict @entity10094 in chronic @entity1526 . The presence of @entity1283 , frequent @entity1540 , and male sex refined LV function stratification in these @entity1 .

Electrocardiographic ventricular repolarization parameters in chronic XXXX as predictors of asymptomatic left ventricular systolic dysfunction.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity712 :: ('MESH:D006333', 'Disease') :: ['heart failure'] @entity1283 :: ('MESH:D006332', 'Disease') :: ['cardiomegaly'] @entity10094 :: ('MESH:D058070', 'Disease') :: ['asymptomatic dysfunction'] @entity409 :: ('MESH:D008107', 'Disease') :: ['LV dysfunction'] @entity1526 :: ('MESH:D014355', 'Disease') :: ["Chagas' disease"] @entity1540 :: ('MESH:D018879', 'Disease') :: ['premature ventricular contractions', 'PVCs'] @entity299 :: ('MESH:D006331', 'Disease') :: ['systolic dysfunction'] @entity1162 :: ('MESH:D008133', 'Disease') :: ['QT']
@entity1526 :: (MESH:D014355,Disease) :: ['Chagas' disease']
