Introduction: Novel method of cardiac mapping based on numerical reconstructions of data obtained from body surface electrograms. Electrocardiographic imaging (ECGI) includes phase mapping of re-entrant arrhythmia, which was translated from basic science. Reliability of the method required validation.
Aim: The aim of the study was to compare results of activation and phase mapping in patients with type 1 flutter.
Methods: Three patients (age 56±7, male) underwent ECGI study (including heart and torso CT) and ECG body surface mapping followed by data processing.
Based on processing of unipolar electrograms, isochronal maps, using -dU/dt max approach and phase maps (Hilbert transform approach) were created.
Results: Both types of maps demonstrated similar pattern of excitation, including counterclockwise rotation around tricuspid annulus.
However, compared to activation front on isochronal map, phase jump boundary was moved back by half cycle of atrial flutter. In addition, phase map demonstrated high quality of visualization.
Conclusions: New method of re-entrant arrhythmia visualization based on phase mapping was demonstrated.