心房隔膜欠陥の閉塞は,子供と青少年における左心室と右心室の血動力学的力を正常化する
Per M Arvidsson1, Henning Clausen2, Pia Sjöberg1
1Clinical Physiology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden; Department of Clinical Physiology, Skåne University Hospital, Lund, Sweden.
まとめ
心房隔膜欠陥 (ASD) 閉塞は,心室内の血動力学力 (HDF) を改善します. RV HDFは処置後に正常化する一方,LV HDFの変化は,先天性心疾患患者の進行中の改造を示唆しています.
科学分野:
- 心血管イメージングと血液動力学
- 生まれながらの心臓病の研究
- バイオメディカルエンジニアリング
背景:
- 心房隔膜欠陥 (ASD) は,慢性的な右心室 (RV) 容量の過負荷を引き起こし,潜在的に心不全につながる.
- 現在の治療法 (外科 / トランスキャセター閉塞) は血液動力学を改善しますが,腹腔内血動力学力 (HDF) に及ぼす影響は十分に理解されていません.
研究 の 目的:
- ASDの閉塞がバイブントリキュラーHDFに与える影響を評価する.
- 心臓の先天性疾患における心室リモデリングを理解するために.
主な方法:
- 心臓磁気共鳴画像 (1.5T) で4Dフローとシネマシーケンスを用いる.
- 画像データからHDFを計算するために使用されるカスタムソフトウェア.
- HDFをASD閉鎖前と後に比較したペア分析.
主要な成果:
- ASD患者のベースラインのRV HDFは異常であり,体積負荷と相関していた.
- 閉鎖後8カ月で,RV HDFは正常化し,LV HDFは方向的な変化を示した.
- HDFの変化は,心室の体積の改造とシャントの減少と関連していた.
結論:
- ASDの患者は,負荷状態による心室内HDFの変化を示します.
- ASDの閉塞は多くの場合,すべての場合ではないが,HDFを正常化する.
- HDF分析は,先天性心疾患における心室リモデルの洞察を提供します.
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