Cardiac tissue stimulator for stimulating in the DDX modality

摘要: A programmable cardiac stimulator capable of stimulation in the DDX modality having a first sensing system (46) for electrical activity atrium, second (48) ventricle, pulse generator (24) connected to and responsive sensed by these systems (46, 48) determining timing supplying pulses atrium this depolarization circuit with changing from DDD DVI when premature ventricular is prior during pacer cycle.