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  Indian J Med Microbiol
 

Figure 1: Conceptual description of the advanced reference annotation algorithm. (a) Ventricular-based reference annotation with the advanced reference annotation algorithm. Ventricular channels with good signal-to-noise ratio enter the calculation (left). The sum (or product) of dV/dt is used to generate the activity signal (center) and define the timing of activation based on the center of energy of the activity signal (right). (b) Atrial-based reference annotation with the advanced reference annotation-algorithm. The ventricular activation is determined as per the ventricular-based referencing algorithm. The product of dV/dt is used to generate the activity signal and define the timing of activation

Figure 1: Conceptual description of the advanced reference annotation algorithm. (a) Ventricular-based reference annotation with the advanced reference annotation algorithm. Ventricular channels with good signal-to-noise ratio enter the calculation (left). The sum (or product) of dV/dt is used to generate the activity signal (center) and define the timing of activation based on the center of energy of the activity signal (right). (b) Atrial-based reference annotation with the advanced reference annotation-algorithm. The ventricular activation is determined as per the ventricular-based referencing algorithm. The product of dV/dt is used to generate the activity signal and define the timing of activation