Thioridazine Overdose

Report:

Junctional/sinus rhythm

VEB, dimorphic couplet

Non-sustained ventricular tachycardia (torsade de pointes)

Comment:

The torsades were very frequent, but the 12-lead ECG did not catch the best of them. Nevertheless, the one shown here is reasonably convincing. It is unfortunate that it straddles the lead transition in the middle of the recording.

The QT interval is approximately 0.56”, best seen here in V5; the computer got it at only 0.28”! It is interesting that the torsade is preceded by a dimorphic couplet. This may be an additional insult to the homogeneity of ventricular repolarisation, observed to precede uniform VT or VF as well113.

If you have any suggestions for or feedback on this report, please let us know.