Document Detail

Technetium-99m isonitrile myocardial uptake at rest. I. Relation to severity of coronary artery stenosis.
MedLine Citation:
PMID:  2584555     Owner:  NLM     Status:  MEDLINE    
To determine the potential of planar technetium-99m methoxybutyl isonitrile myocardial imaging as a method of detecting totally occluded or severely stenosed coronary arteries, the regional distribution of technetium-99m isonitrile at rest was compared with the coronary anatomy in 38 patients with prior myocardial infarction who underwent coronary arteriography. Left ventricular technetium-99m isonitrile tracer uptake at rest was assessed in the three major coronary vascular territories. When qualitative rest technetium-99m isonitrile uptake was markedly reduced or absent (grade 0), there was a 91% probability of finding a totally occluded or severely stenosed coronary artery. When qualitative tracer uptake was reduced (grade 1) or normal (grade 2), it excluded all territories supplied by a totally occluded vessel with poor collateral flow. Quantitative technetium-99m isonitrile uptake (mean +/- 1 standard deviation) in territories supplied by an occluded coronary artery with poor collateral flow (42 +/- 21%) was lower than in territories supplied by a vessel with less than 50% stenosis (87 +/- 10%) and 50 to 99% stenosis (74 +/- 19%) (p less than 0.001). Furthermore, technetium-99m isonitrile uptake in areas supplied by an occluded coronary artery with good collateral flow (61 +/- 23%) was lower than in areas supplied by a vessel with less than 50% stenosis (87 +/- 10%) (p less than 0.001). Because rest technetium-99m isonitrile imaging detects coronary occlusion with poor collateral flow, this method may be useful in assessing patients with acute myocardial infarction.
V Dilsizian; T P Rocco; H W Strauss; C A Boucher
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  14     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  1989 Dec 
Date Detail:
Created Date:  1990-01-10     Completed Date:  1990-01-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1673-7     Citation Subset:  AIM; IM    
Division of Nuclear Medicine, Massachusetts General Hospital, Boston 02114.
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MeSH Terms
Collateral Circulation
Coronary Angiography
Coronary Disease / radionuclide imaging*
Heart / radionuclide imaging*
Middle Aged
Organotechnetium Compounds
Technetium Tc 99m Sestamibi
Grant Support
Reg. No./Substance:
0/Nitriles; 0/Organotechnetium Compounds; 109581-73-9/Technetium Tc 99m Sestamibi
Comment In:
J Am Coll Cardiol. 1989 Dec;14(7):1685-8   [PMID:  2584557 ]

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