JACC -- Boriani et al. 33 (2): 333 Figure IG5

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Figure 5 Surface ECG recordings (leads aVR and D₁) and intracavitary bipolar recordings (HRA = high right atrium; CS = coronary sinus) in a patient at baseline (top) and after flecainide IV infusion (bottom). A lengthening of atrial fibrillation cycle is evident in either HRA or CS recordings.