生まれながらの長QT症候群における診断ミス
Nathaniel W Taggart1, Carla M Haglund, David J Tester
1Department of Pediatrics/Division of Pediatric Cardiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
Circulation
|May 16, 2007
まとめ
ロングQT症候群 (LQTS) と診断された多くの患者は過剰診断されています. サブスペシャリティクリニックでは,LQTSの確率が27%しかなかったことが判明し,この心臓チャネル病における診断上の課題を強調しています.
科学分野:
- 心臓病学 心臓病学
- 遺伝学 遺伝学とは
- クリニカル診断士
背景:
- ロングQT症候群 (LQTS) は,生命を脅かす心臓のチャネル病です.
- LQTSは,心拍,昏睡,またはとして誤診されることがあります.
- 意識の向上は,LQTSの過剰診断につながる可能性があります.
研究 の 目的:
- LQTSサブスペシャリティクリニックと初期紹介診断の間の診断合意を評価する.
- 疑われるLQTS症例における診断の不一致に寄与する要因を特定する.
主な方法:
- LQTS評価のために紹介された176人の患者の遡及的レビュー.
- 初期紹介診断と専門家の再評価診断の比較.
- 患者の分類は,明確なLQTS (D-LQTS),可能なLQTS (P-LQTS),またはLQTSがない (No-LQTS) に分類する.
主要な成果:
- 患者の27%だけがD-LQTSを有し,41%がNo-LQTSと診断されました.
- 遺伝子検査はD-LQTSの78%,P-LQTSの34%で陽性であった.
- 訂正されたQTインターバル (QTc) の誤算と症状の誤解釈は,誤診の重要な要因でした.
結論:
- LQTSの診断コンコンダンスが低く,患者の3分の1未満が初期診断に同意した.
- 紹介された患者の有意な割合 (41%) は,専門家の評価でLQTSを持っていなかった.
- 診断の誤差は,QTcの過大評価,境界線QTc値,症状の誤った解釈から生じる.
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