A new electrophysiologic triad for identification and localization of the critical isthmus in atrial flutter Pedro Adragão, Daniel Matos, Francisco Moscoso Costa, Pedro Carmo, Diogo Cavaco, Gustavo Rodrigues, João Carmo, Francisco Morgado, Miguel Mendes

Late atypical atrial flutter after ablation of atrial fibrillation Raquel Ferreira, João Primo, Luis Adão, Anabela Gonzaga, Helena Gonçalves, Rui Santos, Paulo Fonseca, José Santos, Vasco Gama

Identification of a critical isthmus in complex macroreentrant atrial tachycardia using Ripple mapping in a patient with surgically repaired Ebstein's anomaly Gustavo Lima da Silva, Nuno Cortez-Dias, Luís Carpinteiro, João de Sousa