Q-T interval as predictor of serum calcium level

To assess whether measurement of the electrocardiographic (ECG) Q-T interval is a useful predictor of total serum calcium concentration, 15 uraemic patients were studied (10 female, five male; age range, 25–60 years). Resting ECGs were interpreted by three independent observers without knowledge of...

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Veröffentlicht in:International journal of cardiology 1993-12, Vol.42 (2), p.161-164, Article 161
Hauptverfasser: Ljutic, Dragan, Rumboldt, Zvonko, Simunic, Miroslav, Pivac, Nediljko, Bagatin, Jugoslav, Andrews, Peter
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Sprache:eng
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Zusammenfassung:To assess whether measurement of the electrocardiographic (ECG) Q-T interval is a useful predictor of total serum calcium concentration, 15 uraemic patients were studied (10 female, five male; age range, 25–60 years). Resting ECGs were interpreted by three independent observers without knowledge of the patients' identity or serum calcium. Three variants of measurement of the Q-T interval were analysed, of which Q- aT c, the interval from the beginning of the Q-wave to the apex of the T-wave, was the most consistent (coefficient of variation, 2.7%). This also provided the best correlation with measured serum calcium concentration ( P < 0.001). When compared to biochemical measurements, the predicted serum calcium concentration was within 95% confidence limits in 14 of the 15 patients studied. However, the wide confidence limits of this technique mean that it cannot be recommended in routine clinical practice.
ISSN:0167-5273
1874-1754
DOI:10.1016/0167-5273(93)90086-V