Monitoring and tracking bipolar ablation

A method for treating abnormal cardiac electrical activity, comprising the steps of:

• providing a probe having first and second ablation electrodes disposed on a distal portion of the probe and a sensing electrode disposed between the first and second ablation electrodes;
• bringing the probe into contact with a target tissue in a heart of a subject;
• applying energy through the first and second ablation electrodes to ablate the target tissue along an ablation path;
• while performing the step of applying energy, monitoring cardiac electrical activity using the sensing electrode to detect the cardiac electrical activity;
• making an observation that the cardiac electrical activity is no longer detectable by the sensing electrode;
• and
• responsively to the observation terminating the step of applying energy.