[Uncommon aspect of electrocardiographic ischemia. Correlations with coronarography]. / Aspect insolite de l'ischémie électrocardiographique. Corrélations avec la coronarographie.

ABSTRACT

It has long been known that the morphology of ventricular repolarization is extremely sensitive to acute or chronic myocardial anoxia. In patients with coronary disease, we are used to observe a wide variety of ST segment, T wave and sometimes U wave abnormalities. The classical description of "lesions" or "ischaemia", as well as their anatomical locations called, perhaps rather arbitrarily, "subendocardial" or "subepicardial" account for ST segment displacements and T wave inversions the patterns of which are well known to all of us. It may happen, however, that repolarization takes a frankly unusual appearance very different from the conventional images. On several occasions we were surprised to find, in a situation of acute or subacute coronary obstruction, a highly atypical and characteristically very transient repolarization pattern with considerable lengthening of QT and broad and deep inversion of T wave which, to our knowledge, have never been described in the literature. A systematic search for such unusual ECG patterns, conducted over the last 4 years in the Cardiology department of the Bicêtre Hospital on patients with ischaemic heart disease, has yielded 16 cases which are reported in the present study.