Estimation of cardiac QTc intervals in people prescribed antipsychotics: a comparison of correction factors.

Teodora AndricKarl WinckelTimothy David TanzerSamantha HollingworthLesley SmithKatherine IsoardiOlivier TanDan J Siskind

Published in: Therapeutic advances in psychopharmacology (2022)

Machine-measured QTc using the Bazett formula overestimates the QTc interval length and number of people with a prolonged QTc, compared with other formulae and the QT-nomogram. We recommend manually measuring the QT and correcting with the Fridericia formula or QT-nomogram prior to modifying antipsychotic therapies.

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