The Electrophysiology of Atrial Fibrillation: From Basic Mechanisms to Catheter Ablation

Figure 12

AcQMap noncontact mapping system (Acutus Medical, CA, USA). (a) The multipolar spherical AcQMap catheter with a diameter of 25 mm (deployed), which consists of 6 splines, each of which contains 8 electrodes and 8 ultrasound transducers (total 48). (b) The three-dimensional model of the LA is constructed by emitting ultrasonic waves reflecting them to the cardiac wall. (c) The system displays on the three-dimensional model the propagation of the impulse, calculated by measuring the dipole density.

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