CPC A61B 5/6859 (2013.01) [A61B 5/287 (2021.01); A61B 18/1492 (2013.01); A61B 2562/04 (2013.01)] | 19 Claims |
1. An apparatus, comprising:
(a) a shaft; and
(b) an end effector at a distal end of the shaft, the end effector being sized to fit in an anatomical passageway within a subject's cardiovascular system, the end effector comprising at least one electrode pair, the at least one electrode pair being configured to contact cardiovascular tissue and thereby pick up electrocardiogram signals, each electrode pair including first and second electrodes spaced apart along a longitudinal axis from each other by a gap area (Ag) located between the electrodes, the gap area (Ag) having a gap distance (Lg) with respect to the longitudinal axis such that:
(i) a length of one of the electrodes (L) along the longitudinal axis is equal to or greater than the gap distance (Lg); and
(ii) a ratio of an area defined by the gap area (Ag) to one electrode area (Ae) is equal to or less than one,
the gap distance (Lg) being determined by a product of the one electrode area (Ae) up to one millimeter squared and a conversion factor of about 1.25 mm−1 or less.
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