The EKG in the patient treated with phenothiazines

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The following may be present on electrocardiography:

1. Widening, flattening, notching or inversion of the T wave
2. Prolongation of the QTc interval which is dose related
3. A prominent U wave may be present
4. Incidence of these findings is greater with Mellaril > Thorazine > Stelazine.

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