XXXX factors in @entity3454 .

@entity1 @entity1165 @entity339 @entity3454 @entity572 @entity1540 @entity943
To assess the prevalence of @entity943 and late potentials (LPs) in @entity3454 ( @entity3454 ) and to identify clinical, ECG, and echocardiographic markers of spontaneous @entity943 , we studied 58 consecutive @entity1 (mean age 46.6 +/- 17.8 years; 29 males, 29 females) with @entity3454 diagnosed by echocardiography. @entity1 underwent ambulatory ECG recording (n = 58), exercise stress test (n = 56), signal-averaged ECG (n = 58), and programmed ventricular stimulation (n = 52). Ten @entity1 (17.2%) had spontaneous @entity1165 ( @entity1165 ), 26 @entity1 (44.8%) had @entity1540 ( @entity1540 ), Lown grade > or = 3 during 24-hour ECG, and 19 had Lown grade > or = 3 @entity1540 during exercise stress test; 13 @entity1 had LPs (22.4%). We provoked sustained VT in one case and @entity1165 in ten cases. @entity1 with complex @entity943 during 24-hour ECG and exercise stress test were older and more often had @entity339 . There was a statistical correlation between the presence of LPs and spontaneous VT (46.1% vs 8.9%; P < 0.005) and induced @entity943 (50% vs 12.8%; P < 0.005). No correlation was found between spontaneous @entity943 and @entity572 of the mitral valve. In conclusion, complex ventricular @entity943 (especially VT) and LPs are frequent in @entity3454 . @entity1 age and @entity339 seem to be determinant factors of complex @entity943 in @entity3454 . On signal-averaged ECG, absence of LPs seems to be a good additional marker to identify @entity3454 @entity1 without spontaneous VT. On the other hand, programmed ventricular stimulation does not appear valuable in determining a @entity3454 subgroup with a high risk of @entity943 .
