Fuente: Wipo "Sensorization" This invention is an integrated system for managing cardiac rhythm comprising a wearable device (such as a finger wring or wrist band) that measures body oxygen levels and an implanted cardiac rhythm management device (such as a pacemaker). Working together in an integrated system, a wearable device for measuring oxygen level in body extremities and an implanted device for cardiac rhythm management can help to prevent oxygen deficiencies in body extremities.