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主要冠動脈の2枝同時閉塞による急性心筋梗塞は極めて稀であり,緊急CAG施行以前での予測は困難である.我々は最近同症例を2例経験した.症例1は77歳女性で前胸部痛にて来院し,緊急CAGにてRCA Segment 3,LAD Segment 7に完全閉塞を認め,ICTにて共に90%の狭窄に改善した.症例2は58歳男性で,上腹部痛にて来院し,緊急CAGにてRCA Segment2,LAD Seg-ment 6に完全閉塞を認めたが,ICT,UKの投与にてSegment 2は99%の狭窄に改善し,Seg-ment 6も再開通をみた.急性期の心筋dualシンチグラムでは,共にRCA,LADの2枝同時閉塞に一致した所見であった.発症機序としては,冠動脈のvasospasmや心筋梗塞発症時の凝固能亢進状態,冠還流圧の低下など複数の要因が考えられた.
Acute myocardial infarction with simultaneous occlu-sions of two main branches is very rare, and it is difficult to presume it before performing emergent CAG. We encountered two such cases recently. Case 1 was a 77 year-old woman. She was admitted to our hospital because of anterior chest pain. Emergent CAG dis-closed complete occlusions of RCA-Segment 3 and LAD -Segment 7. ICT improved both of them to 90% stenoses. Case 2 was a 58 year-old man. He was admitted to our hospital because of upper abdominal pain. Emergent CAG disclosed complete occlusions of RCA-Segment 2 and LAD-Segment 6.
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