A tracing shows a uniform, thick, fuzzy baseline with small spikes occurring exactly 60 times per second across all leads. What is the most likely cause?

Giải thích

Sixty-cycle interference is alternating current picked up from nearby electrical devices, cords, or fluorescent lights, and it produces a perfectly regular fuzzy band at 60 hertz in the affected leads. Shivering produces irregular jagged somatic tremor rather than a uniform pattern. Deep breathing causes a slow wandering baseline, and dried electrodes produce erratic noise or a flat trace in one lead.