An extended wear electrocardiography patch is provided. A flexible backing is formed of an elongated strip of stretchable material. A circuit is affixed to an outward-facing surface of the flexible backing and includes a pair of circuit traces each originating with one of the ends of the elongated strip. A pair of electrocardiographic electrodes are each electrically coupled to one of the circuit traces and conductively exposed on a contact surface of each end of the elongated strip through an opening. When the flexible backing is at rest, the electrodes are approximately centered over their respective openings on a patient's skin and during bending of the flexible backing, the electrodes slide over at least a portion of the flexible backing while maintaining electrical contact between the electrodes and the patient's skin.
