This patient had classic atrial flutter with a cycle length of 240 msec prior to ablation. The P waves were deeply negative in ECG leads II, III, and aVF, and were initially upright in V1. Note ...

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Atrial flutter occurs when a “ reentrant ” circuit is present, causing a repeated loop of electrical activity to depolarize the atrium at a rate of about 250 to 350 beats per minute; the ...

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A 64-year-old male presents 2 weeks following successful atrial flutter ablation and dual-chamber pacemaker implantation complaining of fatigue, but had no palpitations. What is the diagnosis?