[Myocardial metabolism in XXXX with angiographically normal coronary arteries].

@entity1 @entity844 @entity308 @entity951 @entity880 @entity2388
Myocardial metabolism was studied during rapid atrial pacing in 22 @entity1 with @entity951 and angiographically normal coronary arteries. @entity2388 , non esterified @entity844 and @entity880 levels were measured in the coronary arteries and veins under basal conditions, at the peak of atrial pacing and during the recovery phase. A control group of 8 @entity1 had neither @entity308 , or @entity880 production during atrial pacing. A correlation was observed between the coronary arterio-venous difference and arterial @entity2388 and non esterified @entity844 levels in the 22 @entity1 during the 3 periods of study. The control @entity1 did not differ significantly from the rest of the population. There was a correlation between the coronary arterio-venous difference and arterial @entity880 levels under basal conditions in all of the study and control groups. This correlation remained significant during atrial pacing and the recovery period only in the control group. It was possible to distinguish a group of 14 @entity1 (64 p. 100) (Group A) with a correlation coefficient of @entity880 production similar to the control group (+/- 2 standard deviations) during atrial pacing, from a second group of 8 @entity1 (36 p. 100) (Group B) with abnormal myocardial metabolism. The arterial @entity880 concentrations were similar in both groups in the 3 periods of study. A coefficient of @entity880 extraction less than 10 p. 100 was observed in 2 @entity1 in Group A and in 7 @entity1 in Group B (88 p. 100, p less than 0.01). One @entity1 in Group B had a coefficient of @entity880 extraction greater than 10 p. 100 (+ 13 p. 100).(ABSTRACT TRUNCATED AT 250 WORDS)
