Using multi-site recording electrodes in direct contact with excitable tissues or cells, electrical signals are simultaneously acquired from multiple locations. Dedicated software then processes these signals to generate visual maps and dynamic videos, enabling accurate identification, evaluation, and spatial localization of excitation activity.

Simultaneous recording of atrial and ventricular electrical activities

Activation map of field potential at different sites. The conduction direction is from the red area to the blue area with a conduction time of 5.8 ms.

Activation map of field potential at
different sites

Sequential waveforms of excitation times at different sites

Measurable parameters include: excitation frequency, pacemaker site, conduction direction and velocity, conduction dispersion, repolarization dispersion, and QT interval dispersion.

In addition to field potential recordings, the system enables synchronous monitoring of ventricular systolic pressure, coronary perfusion pressure, monophasic action potentials, electrocardiograms (ECGs), and perfusion temperature, providing comprehensive electrophysiological and functional assessment.

Electrophysiological mapping and action potential recording were performed on the right atrioventricular ring of rats. It was found that in the presence of the sinus node, the right atrioventricular ring only serves as an electrical conduction region; after sinus node removal, it can initiate autonomous pacing and exhibit pacemaker-characteristic action potentials. These findings demonstrate that the right atrioventricular ring possesses ectopic pacemaker potential and is a potential origin site of atrial tachycardia.