Catheter stability indication

A method, comprising the steps of:

• introducing a probe into a fluid-filled body cavity of a subject, the fluid-filled body cavity having a temperature, the probe having a temperature sensor on a distal portion of the probe thereon, the body cavity having an interior wall;
• passing an irrigating fluid through the probe, wherein the irrigating fluid exits the probe at the distal portion into the body cavity, and wherein a temperature of the irrigating fluid is different from the temperature of the body cavity;
• while passing the irrigating fluid, recording temperature readings of the temperature sensor, wherein recording temperature readings comprises recording a first temperature reading and thereafter recording a second temperature reading, the contact criteria comprising the second temperature reading being lower than the first temperature reading, the method further comprising reporting a contact between the probe with the interior wall responsively to the determination and wherein the second temperature reading comprises transient elevations between 1 to 4 degrees C. that are between 0.3 to 5 seconds in duration and the method still further comprising reporting an intermittent contact between the probe and the interior wall;
• making a determination from the temperature readings that predetermined contact criteria between the probe and the interior wall of the body cavity are satisfied;
• and
• thereafter alerting an operator that the contact criteria are satisfied.