低钙血症伴QTc间期缩短——危重症者病情恶化监测的重要指标

QTc interval shortening with lower serum Ca^(2+):an important indicator of disease progression in critically ill patients

资料显示,继发性短QT综合征（SQTS）恶性程度高,缺少有效的救治手段。当QT间期缩短达SQTS标准[1实测QT间期〈320ms;2QT间期小于QT间期预测值[QTp=656/（1＋HR/100）]的88%;3QTc≤340 ms]时,患者往往数分钟至24h内发生死亡[1]。本文对40例死亡患者心电图及电解质资料进行分析,寻找其变化规律,为危重症者病情恶化寻找新的预警指标.

Summary QT interval and electrolytes in 40 patients with short QT syndrome were analyzed. Patients＂ QT interval, QTc interval, 3T interval and JTc interval were significantly shorter before death, Tp-Tec interval was slightly longer （P〈0.05）, QRS wave duration and Tp-Te interval were no significant different. The serum Ca2＋ decreased before death. Serum K＋ , Na＋ , C1 and Mg2＋ were no significant different.