Devices and methods for sizing valve apertures and luminal organs. In at least one embodiment of a device for obtaining measurements within a luminal organ of the present disclosure, the device comprises an elongated body having a distal end and at least two electrodes positioned at the distal end of the elongated body or to a portion of the device distal tot the distal end of the elongated body, the device configured to obtain data sufficient to determine a dimensional measurement within the mammalian luminal organ when positioned and operated therein.
