Table 1.
Details of the four patients with QT prolongation
| Age/gender | Dose (mg) | Reason for presentation | History | Time to QT prolongation (min) | Maximum QT interval (ms) | Heart rate (beats min−1) |
|---|---|---|---|---|---|---|
| 41 M | 10 | Hallucinations due to amphetamines | Poly-substance abuse. Urine drug screen positive for amphetamines and THC | 210 | 522 | 53 |
| 25 M | 20 | Amphetamine toxicity and agitation | Taking methadone confirmed on urine drug screen. | 50 (start of recording) | 512 | 59 |
| 52 M | 10 | Attempted suicide with liquid petroleum gas | Poly-substance abuse. Urine drug screen positive for THC, amphetamines | 260 | 534 | 39 |
| 17 F | 10 | Lamotrigine overdose | Post-natal depression | 110 (start of recording) | 505 | 40 |
THC, tetrahydrocannibinol.