IRE Transactions on Bio-Medical Electronics

A new theory, the intrinsic component theory, is proposed for electrocardiography. This theory is based on the temporal characteristics rather than spatial orientations of the current sources and sinks in the heart. The theory may be stated as follows: the electrical activities of the heart may be decomposed into spatially nonorthogonal, stationary sets of current sources and sinks. The time varia... View full abstract»

A classical clinical experiment, in which periodic breathing is induced in a normal subject by hyperventilation, has been successfully simulated on the high speed analog computer. The model, together with its underlying theory, is presented. Its applications to the study of individuals who experience persistent periodic (Cheyne-Stokes) breathing is indicated. View full abstract»

Electromagnetic blood flowmeters were first constructed and used by Kolin in 1936 and, independently, by Wetterer in 1937. These early instruments consisted essentially of a large dc electromagnet, a pair of electrodes, and a string galvanometer; they made possible the recording of flow in exposed, large arteries of anesthetized animals under stringent experimental conditions. Modern electromagnet... View full abstract»

A contact lens photoelectric eye movement recording system is described. The transducer is carried on a dental bite and the subject is permitted freedom of movement within the limitations of a trailing HT and signal lead, reasonable ambient illumination is permissible. Sensitivities of the order of 40-sec arc/cm of trace deflection are readily obtainable, with a dynamic range in excess of 56 db. A... View full abstract»