Pacing mapping of ventricular tachycardia (vt) with direction vector indication

Abstract

A system includes a catheter, an electrocardiogram (ECG) system, and a processor. The catheter is configured to apply pacing to given tissue location inside a ventricle of heart of patient. The ECG system is configured to acquire a set of ECG signals generated in response to the pacing, wherein electrodes of the ECG system attached to the patient define respective directions in space relative to an origin located in the heart. The processor is configured to (i) calculate respective set of signal differences between the acquired set of ECG signals and reference set of ECG signals, (ii) calculate corresponding set of deviation vectors along the respective directions in space, the deviation vectors having amplitudes corresponding to the respective signal differences, (iii) using the deviation vectors, calculate direction vector from the given location to new ventricle location at which to apply the pacing, and (iv) indicate calculated direction vector to user.

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