保存されたLVEFの患者における右心房アピカルペース: 副作用とメカニズム
Tasneem Z Naqvi1, Shuang Liu1, Oral Waldo1
1Department of Cardiology, Mayo Clinic, Phoenix & Scottsdale, Arizona, USA.
JACC. Advances
|August 29, 2025
まとめ
右心室発射分数 (LVEF) が正常な患者では,右心室発射分数 (RV) の高い負荷 (≥50%) は,左心室発射分数 (LVEF) の低下と心臓不全の入院の増加に関連しています. この研究は,RVアピカルペースの潜在的長期的な心臓リスクを強調しています.
科学分野:
- 心臓病科
- 電気生理学
- 心臓のペース
背景:
- 左心室排泄分数 (LVEF) が正常な患者における右心室 (RV) ペースの長期的な有害な心臓効果は十分に理解されていません.
- これらの効果を理解することは ペース戦略と患者の結果の最適化に不可欠です
研究 の 目的:
- 発症時のLVEFが正常な患者におけるVRアピカルペースの副作用を評価する.
- 静脈回路のペースの負荷が静脈回路のシストリック・ダイアストリック機能,メカニカル・ディシンクロニー,心不全入院 (HFH),全因死亡率に与える影響を決定する.
主な方法:
- RVアピカルペースメーカーのインプラントとLVEF ≥50%の患者の医療記録の遡及的レビュー
- 平均4. 98年の追跡期間におけるRVペース負担の分析 (<50% vs. ≥50%)
- LVシストリック機能 (LVEF),ダイアストリック機能 (E/e'比),LVメカニカル不協和 (ストレイン画像),HFH,全因死亡率の評価.
主要な成果:
- RVペースの負荷が50%以上であった患者は,負荷が50%以下であった患者と比較して,LVEFの有意な減少を示した (中位減少は6. 0%対3. 0%,P=0. 001).
- RVペース ≥50%,ベースラインのLVEFの低下,ベースラインのLVEFの悪化,ベースラインのE/ e'比率の上昇,およびLVのメカニカル不協和はHFHの予測因子であった.
- 発症時のメカニカル不協和症,悪化する不協和症,および発症時の全因死亡率の上昇.
結論:
- 慢性的なRVアピカルペースは,発症時のLVEFが正常な患者では,LVのシストリック機能の低下とLVのメカニカル不協調性の増加と関連しています.
- 心臓不全の入院のリスクが 大きく増加します
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