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Multimodality Diagnosis of Mesenteric Ischemia
Published on: July 21, 2023
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perfusion vs. function: ischemic cascade in demand ischemia: single-vessel vs. multivessel stenosis: single-vessel
Howard Leong-Poi1, Se-Joong Rim, D Elizabeth Le
1Cardiac Imaging Center, Cardiovascular Division, University of Virginia School of Medicine, Charlottesville, Va, USA.
Circulation
|February 28, 2002
まとめ
需要性缺血では,機能的変化の前に異常な心臓 perfusion が起こります. この perfusion 異常は,機能的変化よりも広範囲に広がり,単血管狭窄症 (SVS) では多血管狭窄症 (MVS) よりも顕著です.
科学分野:
- 心血管生理学 心血管の生理学
- エコーカルディオグラフィー エコーカルディオグラフィー
- 発血不全性心臓病 発血不全性心臓病とは
背景:
- デマンド・イシュケミアは,心筋 perfusion と機能の異常につながる可能性があります.
- これらの異常のシーケンスと空間的な範囲を理解することは,冠動脈狭窄症の診断に不可欠です.
- 単血管狭窄症 (SVS) と多血管狭窄症 (MVS) を区別することは,不全性変化の呈現に影響を与える可能性があります.
研究 の 目的:
- 需要性イシュケミア中の異常な心筋 perfusion と機能の間の時間的,空間的関係を調査する.
- これらの関係を単血管狭窄症 (SVS) と多血管狭窄症 (MVS) の文脈で比較する.
- perfusion 異常が機能的異常に先行するかどうかを判断し,その相対的な空間的な範囲を決定する.
主な方法:
- 9匹の犬は,SVSまたはMVSの配置を受け,狭窄の重度が異なる.
- ドブタミン注入は,需要性イシュケミアを誘発するために使用されました.
- 心筋 perfusion (心筋コントラストエコー) と壁の厚み (機能の尺度として) は,異なるドブタミン用量で評価されました.
主要な成果:
- SVSにおける異常な壁の厚みよりも低いドブタミン用量で異常な perfusion が検出されました.
- perfusion 異常の空間的な範囲は,一般的に機能的異常よりも大きかった.
- perfusion と function の間の空間時間的な不調和は,SVS と比較して,MVS ではあまり顕著ではなかった.
結論:
- この発見は,機能障害が起こる前に, perfusion deficits が起こる ischemic cascade の概念を裏付けている.
- 異常な perfusion は,異常な機能よりも冠動脈狭窄のより敏感な指標です.
- ドブタミンエコーカルディオグラフィは,異なった不全性変化のパターンにより,SVSと比較して,MVS検出に対するより高い感度を示しています.
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