50 @entity1 (mean age 53.8 +/- 9.2 years) were studied at 1.5 to 2 months (U1), 12 months (U2) and 24 months (U3) after acute @entity583 . Late potentials were registered at the body surface using the signal-averaging technique and a digital Butterworth filter with high pass cut-off frequencies DC, 25, 50, 100 Hz and a low pass cut-off frequency 300 Hz, 18 db/octave, and a 24-hour ECG was recorded. All @entity1 underwent coronary angiography at U1. Late potentials were found at least once during the observation period in 56% of @entity1 , and 18% of @entity1 demonstrated late potentials at all three examinations but up to 38% at one of the three examinations. Complex @entity591 (Lown class IV) were found at least once in 48% of @entity1 and at all three examinations in 18% but up to 38% at one of the three examinations. Only four @entity1 demonstrated late potentials and complex @entity591 at all three examination dates. In contrast, 36% of @entity1 showed neither late potentials nor complex @entity591 at all three examinations. When late potentials and complex @entity943 were present simultaneously, the former were most often detected at the cut-off frequencies DC, 25 to 300 Hz (p less than 0.05). The median of the duration of late potentials was significantly longer at @entity68831 when complex @entity943 were also present. There was a significant relation between late potentials and complex @entity943 at @entity68831 (p less than 0.01 and p less than 0.025) and between the latter and disorders of regional wall motion at all examination dates (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

[Follow-up of late potentials and complex @entity943 following XXXX over a 2-year period].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity591 :: ('MESH:D013610', 'Disease') :: ['tachyarrhythmias'] @entity68831 :: ('26871;26853', 'Gene') :: ['U1 and U2'] @entity583 :: ('MESH:D009203', 'Disease') :: ['myocardial infarction'] @entity943 :: ('MESH:D001145', 'Disease') :: ['arrhythmias']
@entity583 :: (MESH:D009203,Disease) :: ['myocardial infarct']
