Magnetic resonance-based anatomical analysis of scar-related ventricular tachycardia: implications for catheter ablation.

ABSTRACT: In catheter ablation of scar-related monomorphic ventricular tachycardia (VT), substrate voltage mapping is used to electrically define the scar during sinus rhythm. However, the electrically defined scar may not accurately reflect the anatomical scar. Magnetic resonance-based visualization of the scar may elucidate the 3D anatomical correlation between the fine structural details of the scar and scar-related VT circuits. We registered VT activation sequence with the 3D scar anatomy derived from high-resolution contrast-enhanced MRI in a swine model of chronic myocardial infarction using epicardial sock electrodes (n=6, epicardial group), which have direct contact with the myocardium where the electrical signal is recorded. In a separate group of animals (n=5, endocardial group), we also a

SUBMITTER: Ashikaga H 

PROVIDER: S-EPMC2842927 | biostudies-literature | 2007 Oct

REPOSITORIES: biostudies-literature