An electrophysiologic catheter with an improved control handle is provided. The apparatus includes a case defining a socket. The users may also be removed from a group in response to an event. A rotatable press fit mounting bracket with rotatable adjustment means is rotatably affixed to one exterior end of one of the sliding bar hangers, thus. External and internal temperature sensors allow coordinated operation of the ventilating and heating systems to flush the environment with fresh air without causing a freezing condition to exist within the environment. The image search requestor is an abstraction layer that translates user or agent search requests into the language understood by the ROI query.