1991 年 55 巻 11 号 p. 1045-1049
The usefulness of a scoring system with early technetium-99m pyrophosphate scintigraphy as a method for evaluating the efficacy of myocardial preservation after thrombolysis was studied. The mean time from the onset of acute myocardial infarction to injection of the tracer was 5.6±1.5h (range 2.8 to 11.9h). All 36 patients underwent successful recanalization. Patients with strongly positive technetium-99m pyrophosphate uptake in anterior acute myocardial infarction had a significantly lower regional ejection fraction and a significantly larger thallium-201 defect score than those with 2+ positive results in chronic stage. Similarly, in inferior acute myocardial infarction, the thallium-201 defect score was significantly larger in patients with strongly positive uptake than in those with 2+ and negative uptake scores. In conclusion. strongly positive results in early technetium-99m pyrophosphate scintigraphy within 12h after the onset of acute myocardial infarction may indicate failure in limiting the infarct size by coronary thrombolysis.
