Figure 1

Representative fluoroscopy images showing the 7-French conductance catheter (Blue arrow): (A) Prior to alignment with the long axis of the left ventricle and (B) After alignment with the long axis of the left ventricle, and with catheter tip placed in left ventricular apex. Patient has dual chamber pacemaker with right atrial and right ventricular leads in the corresponding chambers. The pulmonary artery catheter is already advanced into the pulmonary artery.