Electrocardiographic Mapping and Imaging
Electrocardiographic Mapping and Imaging
The purpose of this study is to evaluate a novel non-invasive cardiac electric imaging
 methodology for localizing and imaging cardiac electrical activity from body surface
 electrocardiographic recordings in patients with ventricular tachycardia (VT). Using
 non-invasive means will increase our ability to correctly diagnose cardiac abnormalities, and
 aid ablation of cardiac arrhythmias, offering enhanced performance to what currently exists.
Specific Aims

 1. Use non-invasive cardiac electric imaging to provide information as to the sites of origin
 of arrhythmias and sequence of cardiac activation and repolarization.

 Methods and Procedures Approximately 8 patients with recorded Premature Ventricular
 Contractions (PVC), Wolff-Parkinson-White (WPW) or other ventricular tachycardia cases which
 need Ensite/Carto endocardial mapping and radiofrequency ablation treatment will be enrolled.

 One day before catheterization and ablation, patients will undergo approximately 30 minutes
 of Body Surface Potential Mapping (BSPM) recordings with about 200 surface electrodes
 arranged in 20 strips, attached on his/her front and back. BSPMs will be recorded in the
 baseline resting rhythm.

 On the day of ablation, before catheterization in the surgical room, the BSPM recording
 procedure will be carried out with the patient using the same technique used during the first
 BSPM study.

 Clinical endocardial mapping data may also be obtained concurrently with BSPM recordings
 before the ablation procedure.

 Another BSPM recording will be made 30-60 minutes after successful ablation with the patient
 still in normal sinus rhythm if possible. Patients will be followed up 1 month after ablation
 with the same method of BSPM recorded at the baseline resting rhythm.
Any patient undergoing ablation.