Video 26.1 Substrate mapping in BrS patient with normal ECG pattern.
The video is derived from CARTO3 view. Top panel shows two columns with the live ECG and EGM (left) and the acquired point (right) at 200 mm/seconds speed. The baseline ECG is not showing the typical BrS ECG pattern in V1 and V2 placed at second intercostal space. Bottom panel shows the epicardial potential duration map (PDM), which is derived from the acquisition of each EGM. During epicardial mapping, no abnormally prolonged EGMs could be observed as the duration of each EGM recoded in the RV epicardium is less than 160 ms.
Amplification of the ECG tracings in CARTO is 0.32 mV, in order to better appreciate the EGM abnormalities. [00:54]
Video 26.2 Substrate mapping in type 1 Brugada ECG pattern.
The video is derived from CARTO3 view. Same panel representation as in Video 26.1, top panel shows ECG and EGM, while bottom panel shows morphology of the RV epicardium. In presence of type 1 ECG pattern (as shown in V1 and V2), the Decapolar catheter records abnormally prolonged and delayed EGMs with a duration > 160 ms. The entire region of RV exhibiting such abnormalities is shown in purple, representing the Brugada substrate as target for epicardial ablation. Yellow and black dots marked in the purple area indicate the abnormally prolonged EGMs, which are characterized by wide fragmentation and/or discrete and delayed double activity. [00:40]
Video 29.1 Access to the endocardial LV using a transaortic approach via standard aortotomy above the sinotubular junction. [00:06]
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