Radio Telemetry for Measuring Right Atrial Diameter

Abstract

A radio telemetry system to measure right atrial diameter using an ultrasonic method has been developed. This telemetry system aims at long-term or chronic measurement in research animals and finding a solution to the problem of lead maintenance which limits the reliability of measurements by the restriction of an animal's freedom. In addition, this method does not require human interventions which are apt to draw a spurious response inside of an animal's body. As a result, slow subtle changes of the right atrial diameter can be clearly recorded, making this telemetry system a useful tool for chronic physiological research.