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Circulation, Vol 71, 1121-1128, Copyright © 1985 by American Heart Association

ARTICLES

Factors that determine recovery of left ventricular function after thrombolysis in patients with acute myocardial infarction

FH Sheehan, DG Mathey, J Schofer, HT Dodge and EL Bolson

The coronary and ventricular angiograms of 47 patients with acute myocardial infarction in whom reperfusion was achieved by intracoronary streptokinase were quantitatively analyzed to determine the factors that affect recovery of regional left ventricular function after reperfusion. Hypokinesis in the infarct region was measured by the centerline method and expressed in terms of standard deviations (SDs) from normal. Severity of coronary artery stenosis was measured quantitatively. Hypokinesis showed more significant improvement after thrombolysis in patients with minimum stenosis diameter of greater than 0.4 mm than in those with severe residual stenosis, i.e., stenosis producing a minimum diameter of 0.4 mm or less (1.0 +/- 1.3 SD/chord, n = 31, vs 0.0 +/- 0.9 SD/chord, n = 7; p less than .05). Improvement in hypokinesis was greater in patients who received thrombolytic therapy within 2 hr than in those treated later (2.1 +/- 1.1, n = 8, vs 0.7 +/- 1.0 SD/chord, n = 28; p less than .001). These results indicate that angiographic reperfusion alone may not be sufficient: reperfusion must provide adequate flow and be achieved early to salvage myocardial function.

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