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Movement of the ablation catheter over a point-shaped ablation lesion without border zone in orthogonal (a) and parallel (b) orientation (step size: 0.5–1 mm). Four different positions of the catheter are shown exemplarily. Arrows indicate the direction of movement to before and behind the lesion from the initial position (dotted line). Myocardium is more transparently shown in the direction of movement of the catheter.
