ECG 4.3

Patient: 69-year-old man implanted with a Medtronic dual-chamber pacemaker following repeated syncopes due to sinus node dysfunction; the 2 pacing leads are well positioned with normal pacing impedances, correct sensing and satisfactory pacing thresholds; 3 days after implantation, pacemaker evaluation; programming of various pacing modes and recording of tracings; for this first tracing,  device programmed to VVI mode 70 bpm;




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