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先天性心疾患手術後の洞房結節機能不全:発生率と回復への影響
Heart rhythm
|February 11, 2026
まとめ
先天性心臓手術後の洞房結節機能不全(SND)は転帰に影響を及ぼし、17.2%の症例で発生する。ほとんどの患者は回復するが、SNDは入院期間の長期化と有害事象に関連している。
科学分野:
- 小児循環器病学; 心臓手術; 電気生理学
背景:
- 洞房結節機能不全(SND)は、先天性心疾患(CHD)手術後の認識された合併症である。CHD手術後のSNDに関連する術後経過および特定の転帰は、さらなる特徴付けを必要とする。
研究 の 目的:
- 小児心臓手術患者における術後SNDの発生率を決定すること。SNDが術後転帰(入院期間や有害事象を含む)に及ぼす影響を評価すること。
主な方法:
- 2013年から2017年の間に施行された4571件の小児心臓手術を対象とした後向き研究を実施した。SNDは、徐脈、接合部調律、または心房ペーシングの必要性によって定義され、絶対的SNDと相対的SNDにサブカテゴリ化された。術後転帰を、SNDなし、絶対的SND、相対的SNDの群間で比較した。
主要な成果:
- SNDは手術の17.2%(786/4571)で発生し、絶対的SNDは695例、相対的SNDは91例であった。絶対的SNDは、肺静脈、僧帽弁、心房バッフル、グレン、フォンタン手術で最も頻繁に見られた。SND症例は、対照群と比較して、入院期間およびICU滞在期間が長く、抜管が遅延し、重篤な有害心イベントの発生率が高かった。
結論:
- SNDは、特にフォンタン術や僧帽弁手術などの複雑なCHD手術において、重要な合併症である。患者の89%は退院前にSNDから回復したが、11%は持続的な機能不全があり、予後不良と関連していた。術後SNDを伴う全手術の2%で恒久的な心房ペーシングが必要であり、長期的な影響を浮き彫りにしている。
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