Methods and apparatus are disclosed for forming annular lesions in tissue. The methods include introduction of an optical apparatus proximate to a tissue site, via, for example, a catheter. The optical apparatus includes a pattern-forming optical wave guide in communication with a light transmitting...http://www.google.es/patents/US8152795?utm_source=gb-gplus-sharePatente US8152795 - Method and device for cardiac tissue ablation
