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Figure 1 Periprocedural X-ray frontal view showing the position of the intracardiac leads. RAA = right atrial appendage; CS-LA = coronary sinus for left atrial pacing; LV = left ventricle through a lateral vein over the LV-free wall; RVA = right ventricular apex; RPA = right pulmonary artery (Swan-Ganz catheter).
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