Legend to Figures
Figure 1 A , The CT imaging show the AD between LIPV and LAA. B , the P wave of AT showed negative wave with negative polarity in inferior leads and V4-V6, positive polarity and V1 –V3 and iso-electric in leads I, aVL; C and D , activation map of the LA revealed that the site of earlier activity during tachycardia was broad at the LAA ridge; however, the activation time at proximal ABL catheter was earlier than the distal ABL catheter. ABL catheter was dragged back to site of ABL34 and mapped the earliest activity with low contact force. ECG, electrocardiogram; AT, atrial tachycardia; ABL, ablation catheter; AP, anterior-posterior view; PA, posterior-anterior view.
Figure 2 The target site preceded earliest activation of the P wave by 39 ms and the AT was terminated during radiofrequency energy delivered. CS, coronary sinus; HRA, high right atrium.
Figure 3 The reconstruction of LA and CARTO merge.A , Anomalous drainage was revealed between the LIPV and LAA using CARTO system. Red star showed the origin site of AT. B , CARTO merge showed the ABL catheter was located at edge of anomalous drainage between the LIVP and LAA. LIPV, left inferior pulmonary vein; LA, left atrium; LV, left ventricle; LAA, left atrial appendage; AD, anomalous drainage; AO, aorta, LSPV, left superior pulmonary vein; RSPV, right superior pulmonary vein; MA, mitral annulus; AP, anterior-posterior view; PA, posterior-anterior view.