title: An implantable pulse generator indicating asystole or extreme bradycardia.
abstract: The design of a pacemaker which indicates the occurrence of significant bradyarrhythmia is described. Significant bradyarrhythmia is defined as either asystole for 6 seconds, bradycardia with three successive RR-intervals greater than 2 seconds each, or five or more RR-intervals of 2 seconds or more over a period of 25 seconds, but without three such intervals in succession. During bradyarrhythmia the generator initially stimulates at an interval of 2 seconds (30 per minute) and when the described criteria have been fullfilled the pacemaker automatically converts to a conventional ventricular inhibited pulse generator stimulating at a rate of 70 per minute.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000628:therapy*; D001919:Bradycardia / Q000503:physiopathology / Q000628:therapy*; D004562:Electrocardiography; D004567:Electrodes, Implanted; D006323:Heart Arrest / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D010138:Pacemaker, Artificial; D011674:Pulse; D012849:Sinoatrial Node / Q000502:physiology