Figure 2. 12 leads EKG showing sinus bradycardia

From

Inhaled Nitrous Oxide ‘Whip-Its!’ Causing Subacute Combined Degeneration of Spinal Cord

Mohammed Al-Sadawi, Hidalgo Claris, Chinyere Archie, Apoorva Jayarangaiah, Modupe Oluya, Samy I. McFarlane

American Journal of Medical Case Reports. 2018, 6(12), 237-240 doi:10.12691/ajmcr-6-12-3