Abstract: An arrangement is provided for optimizing placement of cardiac electrodes and for improved signal processing. In particular, an arrangement is provided for electrode placement and signal processing to obtain 90% of the information obtained by a 12 electrode electrocardiagram by using an optimun four lead arrangement. Further, this arrangement has additional advantages including convenient access by a user, reduction in muscular artifacts, and other advantages.

Abstract: A control system for an electronic data processing system minimizes hardwiring and specialized components and circuits and provides bidirectional communication between a data processor within the data processing system and an operator via intermediary binary digital input and output words. A separate aspect is the provision of a master control panel configuration including means for receiving input and output elements having generalized identities, in conjunction with encoder and decoder means interposed in the circuitry and reducing the interconnections between the panel and the data processing system. The control system converts the status of selector switches and momentary switches to signals representing an intermediary input word. The data processor processs and interprets the signals representing the input word and generates appropriate system responses.

Abstract: A plurality of electrodes affixed at selected positions of the chest of an ambulatory patient sense potentials due to cardiac or pacemaker action of the patient, for transmission by radio, telephone or other means to an EKG and pacemaker performance measuring and analyzing facility. The electrodes are connected to timing, control and signal processing means contained in a smal, conveniently worn or stored housing. Signals from sequenced, selected combinations of electrodes are serially transmitted for given intervals after modification, and in the case of telephone transmission are converted to audio output. The pairs of electrodes are arrayed to yield substantially all the data, from as few as four electrodes connected to provide bipolar leads, obtainable from the conventional 12 lead EKG.