A system for treating an affected portion in a heart comprises a catheter
having a first end and a second end; a mono-polar or bi-polar electrode
coupled to the first end, wherein the electrode is adapted to be inserted
into heart tissue; a power source coupled to the second end and
configured to energize the electrode, wherein the electrode emits a radio
frequency (RF) signal upon being energized to heat the affected portion
to a desired temperature; a temperature feedback control coupled to the
electrode and the power source, wherein electrode is configured to alter
the emitted RF signal based on a measured temperature of the affected
portion. A rotatable member is configured to allow a first portion of the
catheter to freely rotate with respect to a second portion of the
catheter.