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Figure 2 An example of a pulmonary vein (PV) tachycardia. Shown are electrocardiographic leads I and V5, bipolar electrograms recorded with a decapolar ring catheter positioned at the ostium of a left superior PV (L1-2, ..., L10-1), and electrograms recorded within the coronary sinus (CSd, CSp). The mean cycle length of the PV tachycardia was 110 ms, and the cycle length within the CS was 245 ms.
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