“…In high-frequency interference, inhibition may be the carrier wave or a low-frequency modulation, which brings the impulse into the physiological rate range (microwave-oven mode stirrers). The most vulnerable environment, particularly for external pulse generators, is the hospital with its diathermy, cautery, cardioversion, and electroshock therapy, monitoring equipment, electric beds, and electrical life-support equipment (Escher, 1973). Upon sensing extern al EMR, many pacemakers revert to a fixed rate sufficiently dose to their demand rate that the user would not normally detect the change (Mitchell, 1975).…”