Panel I: Present state of industrial development of devices.

Four representatives of the pacemaker industry served as panel members for a presentation and open discussion of the present state of industrial development of devices. Each panel member made a brief presentation describing his or her own company's approach to antitachycardia pacing. The panelists had been encouraged to provide as much detail about novel features as proprietary considerations would allow, as well as device limitatioris and major problems. Summaries of the initial presentations appear below, followed by the discussions which ensued.