[Value of fatty acid imaging using 123I-beta-methyl iodophenyl pentadecanoic acid (BMIPP) to assess viability of infarcted myocardium].
To evaluate clinical value of a new fatty acid imaging tracer, 123I-beta-methyl iodophenyl pentadecanoic acid (BMIPP), 27 patients with myocardial infarction (MI) underwent BMIPP imaging at rest. The results were compared with those of thallium-201 imaging and contrast ventriculography. Of 100 hypoperfused segments on thallium-201 imaging, 34 segments (34%) showed lower BMIPP uptake than thallium-201, and remaining 66 segments showed similar distribution of those tracers. This discrepancy was more often observed in a patients with acute or subacute stages of MI (less than 4 weeks from onset) than those with chronic stage of MI (greater than 4 weeks) (75% vs. 47%; p less than 0.005). In addition, in the patients with chronic stage of MI, the regional wall motion abnormality was less severe in those showing discrepant BMIPP uptake than those showing concordant distribution (the wall motion score: 1.33 +/- 0.62 vs. 0.63 +/- 0.99; p less than 0.05). Furthermore, redistribution on stress thallium-201 imaging was more often observed in than those showing concordant distribution (12%) than those showing concordant distribution (12%) (p less than 0.005). These preliminary study indicates that discrepant distribution of BMIPP and thallium-201 may be often observed, particularly in recent MI and those showing less wall motion abnormality and redistribution on stress thallium-201 imaging. Thus, the combined study of BMIPP and thallium-201 has a potential for assessing tissue viability in patients with MI.
Kawamoto
M
M
Department of Nuclear Medicine, Kyoto University Faculty of Medicine, Japan.
Tamaki
N
N
Yonekura
Y
Y
Takahashi
N
N
Ono
S
S
Nohara
R
R
Kanbara
H
H
Kawai
C
C
Ito
H
H
Ikekubo
K
K
D000328:Adult; D000368:Aged; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000503:physiopathology; D009206:Myocardium / Q000378:metabolism; D013794:Thallium Radioisotopes; D014022:Tissue Survival; D014055:Tomography, Emission-Computed
D005227:Fatty Acids; D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D013794:Thallium Radioisotopes; C049337:15-(4-iodophenyl)-3,3-dimethylpentadecanoic acid