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One of the latest revolutionary three-dimensional (3D) mapping systems is the AcQMapt cardiac mapping system (Acutus Medical, Carlsbad, CA, USA). This system is based on the concept of analyzing dipole density rather than bipolar voltage during mapping. This difference is crucial, since the dipole density analysis considers the electrical activity across cell membranes and should provide much more detailed information in comparison with the bipolar voltage evaluation process, which takes into account a wider area of myocardial tissue and therefore might miss the core of electrical activation. The AcQMapt system (Acutus Medical, Carlsbad, CA, USA) employs the use of a 25-mm basket catheter, which has 48 ultrasound transducers capable of collecting up to 144,000 ultrasound points per minute, and 48 engineered electrodes for the collection of 150,000 intracardiac unipolar samples per second. Electrodes with X, Y, and Z coordinate localization and ultrasound distances are combined to acquire the anatomy of the cardiac chamber, where the basket catheter is positioned; individual points are accumulated to form a surface with mesh-density equivalent to segmented computed tomography (CT), and post-processing of the surface data completes reconstruction.

Intriguing Developments in Cardiac Mapping, Defibrillation, and Pacing