
Figure 1
Transthoracic Echocardiography at admission – Apical two-chamber view of the dilated left ventricle with a calculated ejection fraction of 15%.

Figure 2
Preprocedural electrocardiogram showing atrial fibrillation.

Figure 3
Intracardiac Echocardiography (ICE) image capturing the moment of transseptal puncture (a – tenting of the fossa ovalis upon contact with the needle; b – injection of saline bubbles confirming needle placement in the left atrium; c,d – transseptal sheath insertion). Red asterisk (*) showing the sheath through the interatrial septum.

Figure 4
Intraprocedural fluoroscopy image showing contrast medium into the lumen at the tip of the balloon (red asterisk) that confirms left inferior pulmonary vein occlusion.

Figure 5
Intraprocedural Electrogram demonstrating exit block (orange arrow showing absence of conduction to the atria after pacing from the left inferior pulmonary vein).

Figure 6
3-month Follow-up Transthoracic Echocardiography – Apical two-chamber view of the left ventricle showing a calculated ejection fraction of 56% and significant reverse remodelling.