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Figure 2 An atrial tachycardia (AT) episode that was terminated by Ramp therapy. The graph shows the intervals between atrial (A-A) and ventricular (V-V) events at episode onset, detection, first therapy, and termination. The Ramp therapy was initiated 3.8 min after detection and resulted in the immediate termination of the atrial tachyarrhythmia. AF = atrial fibrillation.