Ice formation in the left mainstem bronchus during cryoballoon ablation for the treatment of atrial fibrillation

Figure 1 Intraprocedural fluoroscopy during cryoballoon ablation showing the mainstem bronchus. This figure shows the right anterior oblique (R) and left anter LSPV. The transseptal sheath (hatched arrow) crosses from the right to the left atriu PV ostium contains an Achieve (Medtronic, Minneapolis, MN) catheter (thin black the left mainstem bronchus (dashed black line). Additional structures in view in echocardiography catheter (solid white arrow), and a coronary sinus catheter (das