A physiological signal monitor having retractable wires may include a housing, a patch and a cradle. The housing may be adapted to carry a memory, a first electrical contact, a second electrical contact, and a processor in data communication with the memory. The patch may include a first side adapted to be secured to a patient and an opposing second side. The cradle connects to the second side of the patch and may be adapted to carry the housing. The cradle may include a wire retractor, a first electrical pad adapted to contact the first electrical contact, a second electrical pad adapted to contact the second electrical contact, a first sensing connector, a second sensing connector, a first wire connecting the first electrical pad to the first sensing connector, and a second wire connecting the second electrical pad to the second sensing connector.