The scoring system for early technetium-99m pyrophosphate scintigraphy as a method of evaluation of limiting the myocardial infarct size by thrombolysis.
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 +/- 1.5 h (range 2.8 to 11.9 h). 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.
Kondo
M
M
Division of Cardiology, Shimada City Hospital, Shizuoka, Japan.
Yuzuki
Y
Y
Shimizu
H
H
Tanaka
A
A
Chou
M
M
Shimono
Y
Y
D000368:Aged; D016009:Chi-Square Distribution; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy; D015425:Myocardial Reperfusion; D011877:Radionuclide Imaging; D013318:Stroke Volume; D016698:Technetium Tc 99m Pyrophosphate; D013794:Thallium Radioisotopes; D015912:Thrombolytic Therapy
D013794:Thallium Radioisotopes; D016698:Technetium Tc 99m Pyrophosphate