[The relation between infarction localization and late potentials].
OBJECTIVE
There are controversies about the relation between infarction localization and late potentials (LP) following acute myocardial infarction (AMI). To evaluate this issue 124 consecutive patients with first Q-wave AMI fulfilling the inclusion criteria were enrolled in this signal--averaged ECG (SAECG) study.


METHODS
The patients were divided into three groups according to infarction localization: anterior (Group I n = 62; 50%), inferior (Group II: n = 42; 34%) and both inferior and right ventricular (RV) involvement (Group III n = 20; 16%). SAECG records were performed during the second week. LP results were evaluated as positive when at least two of the major criteria (QRS > 114 ms, LAS 40 > 38 ms, RMS < 20 V) were obtained. Tukey--Cramer multivariate analysis was performed.


RESULTS
Positive LP results were obtained in 29% of group I, 35.7% of group II and 55% of group III patients. Patients with both inferior and RV involvement had a significantly higher positive LP results independent from left ventricular ejection fraction.


CONCLUSIONS
Therefore, increased risk of arrhythmia in those patients with both inferior MI localization and RV involvement should be taken into consideration.
Iltümür
K
K
Dicle Universitesi Tip Fakültesi Kardiyoloji Anabilim Dali.
Karabulut
A
A
Temamoğullari
A V
AV
Karadede
A
A
Alan
S
S
Siddik Ulgen
M
M
Toprak
N
N
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D016022:Case-Control Studies; D004562:Electrocardiography; D005071:Evoked Potentials; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology*