Tridimensional Distribution of Heart Potentials after Endocardial Stimulation
The current interpretation of clinical electrocardiograms is based on the solid angle theory. The excitation wavefront is considered to act as a uniform layer of current dipoles which are oriented normally to the wavefront, with the positive poles pointing towards the resting tissue. This theory has been recently challenged by several authors (Corbin and Scher, 1977; Spach et al., 1979; Baruffi et al., 1978), who pointed out, that a new model of intracardiac generator should be developed, where the fiber direction (Corbin and Scher, 1977) and the conductivity along different axes (Spach et al., 1978) should be taken into account. However, it has not yet been established how far these factors affect the potential distribution in the extracardiac conducting media.
KeywordsPositive Pole Fiber Direction Conducting Medium Lead Point Current Dipole
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