Abstract 1732: Three-dimensional Left Atrial And Oesophagus Reconstruction Using Cardiac C-arm Computed Tomography For Ablation Of Atrial Fibrillation: Preliminary Experience
Objectives: Threedimensional imaging has been widely adopted as a standard component of the AF ablation procedure. We tested the feasibility of the new 3D imaging system (DYNA-CT) using the C-arm to reconstruct the left atrium and the oesophagus and compared it to the established CT-scan imaging modality.
Methods and results: We included 14 consecutive patients (7 female, mean age 54 +/− 12) presenting for PVAI in the study. Prior to the ablation procedure (<24 hours) a 64 slice CT-scan was used to reconstruct the left atrium and oesophagus in all study patients. Immediately before performing the transseptal puncture a rotational angiography (RTA) was performed with a delay of 4.5 to 8.5 seconds after administration 84 ml of contrast media into the pulmonary artery via a standard 6F pigtail catheter with a flow rate of 15ml/s. The pigtail catheter was flushed immediately after contrast media (CM) administration in inspiration breath hold. In 12 patients 80 ml of barium based CM was administered orally immediately before RTA to contrast the ESO. The acquired CT and RTA left atrial and oesophagus reconstructed images were compared using the Leonardo software (Fig. 1⇓). Table 1⇓ demonstrates results of comparison between CT and RTA data.
Conclusions: From our initial experience DYNA-CT seems to provide a feasible and reliable left atrial and oesophagus images to help mapping and navigation during the PVAI.