Diagnosis of right ventricular involvement in chronic XXXX by means of body surface QRS changes.

@entity1 @entity583 @entity67 @entity4156
ST segment elevation in right precordial leads is thought to be good predictor of right ventricular involvement in @entity1 with @entity4156 . This view, however, is rapidly disappearing. Therefore, using QRS changes in body surface potential maps in the chronic phase, we have attempted to differentiate @entity1 with or without right ventricular involvement. Thirty @entity1 with chronic @entity583 (2 or more months after onset) were studied, in whom 87 unipolar ECGs and right ventriculograms were recorded. The @entity1 were then divided into three groups depending on the locations of their abnormal QRS potentials (-2SD area) exceeding the normal range (mean -2SD). In group A, the -2SD area was located predominantly on the right inferior chest, in group B on the left inferior chest, and in group N on both the right and left inferior chests equally. The results showed that group A had a lower right ventricular ejection fraction (RVEF) compared with group B (A, 40 +/- 7%; B, 53 +/- 10%; p less than .001), while there was no difference in left ventricular ejection fraction between the two groups (49 +/- 11% and 49 +/- 11%, respectively). Moreover, right @entity67 occurred in 14 of the 18 @entity1 (78%) of group A but in only one of the 10 @entity1 (10%) of group B. Group N was presumed to be intermediate between groups A and B.(ABSTRACT TRUNCATED AT 250 WORDS)
