[Delayed potentials and left ventricular hypertrophy].
Delayed potentials (DP) (ECGHA) are markers of the occurrence of ventricular rhythm disturbances, and have a prognostic value after myocardial infarction. In hypertensive heart disease, the prevalence of DP is variable according to the literature (1-40%) and their prognostic significance is not known. We examine the frequency of DP in hypertension (HT) and the relationship between DP and left ventricular hypertrophy (LVH) as defined by echocardiographic estimation of the LV mass index (LVMI). We investigated 50 consecutive patients with essential HT who were being assessed as regards cause and effects of HT. Exclusion criteria were coronary artery disease, bundle branch block and poor echocardiographic trace. ECGHA was registered by means of ART device. The presence of DP as defined according to the criteria of Kacet. LV mass was determine according to the method of Penn and LVH defined according to the criteria of Devereux. Besides LVMI, were examined age, sex, duration of HT, micro-albuminuria, LVH on ECG (Sokolow index and strain-ECG). There were no correlations between the different variables studied and the presence of DP. The results relating to LVMI are shown in Table. There were no correlation between DP and LVH on echography. Other explanations, electrophysiologic, ischemic and histological may explain the greater incidence of BP observed in hypertensive heart disease. [table: see text] The prevalence of DP was not significantly different as regard the presence or absence of LVH (35% vs 25%; p = 0.53). In the 10 patients with the highest LVMI, the DP were enregistered 3 times.
Tremel
F
F
Service de médecine interne et cardiologie, CHRU, Grenoble.
Schwebel
C
C
Longère
P
P
Siché
J P
JP
Mallion
J M
JM
D000200:Action Potentials; D000328:Adult; D000368:Aged; D004452:Echocardiography; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D017379:Hypertrophy, Left Ventricular / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged
Potentials tardifs et hypertrophie ventriculaire gauche.