during atrial pacing after administration of ergonovine , those patients developing their typical chest pain demonstrated significantly lower great cardiac vein flow ( 97 +/- 31 vs 150 +/- 33 ml/min , p less than .001 ) , higher coronary resistance ( 1.27 +/- 0.43 vs 0.77 +/- 0.18 mm hg/ml/min , p less than .005 ) , and less lactate consumption ( 30.5 +/- 22.0 vs 69.7 +/- 41.1 mm . ml/min , p less than .005 ) and a higher left ventricular end-diastolic pressure after pacing ( 20 +/- 4 vs 12 +/- 1 , p less than .001 ) compared with those without pain and in the absence of significant luminal narrowing of the epicardial coronary arteries .
C0008031
chest pain
C0030193
pain