Five-year follow-up of transcatheter intracardiac echocardiography-assisted closure of interatrial shunts.

Objective: We sought to prospectively evaluate long-term follow-up results of intracardiac echocardiography-aided transcatheter closure of interatrial shunts in adults.

Background: Intracardiac echocardiography improves the safety and effectiveness of transcatheter device-based closure of interatrial shunts, but its impact on long-term follow-up is unknown.

Methods: Over a 5-year period, we prospectively enrolled 258 consecutive patients (mean age 48 ± 19.1 years, 169 females) who had been referred to our centre for catheter-based closure of interatrial shunts. All patients were screened with transesophageal echocardiography before the operation. Eligible patients underwent intracardiac echocardiography study and attempted closure.

Results: After intracardiac echocardiography study and measurements, 18 patients did not proceed to transcatheter closure due to unsuitable rims, atrial myxoma not diagnosed by preoperative transesophageal echocardiography or inaccurate transesophageal echocardiography measurement of defects more than 40 mm. The remaining 240 patients underwent transcatheter closure: transesophageal echocardiography-planned device type and size were modified in 108 patients (45%). Rates of procedural success, predischarge occlusion and complication were 100%, 94.2% and 5%, respectively. On mean follow-up of 65 ± 15.3 months, the follow-up occlusion rate was 96.5%. There were no cases of aortic/atrial erosion, device thrombosis or atrioventricular valve inferences.

Conclusions: Intracardiac echocardiography-guided interatrial shunt transcatheter closure is safe and effective and appears to have excellent long-term results, potentially minimizing the complications resulting from incorrect device selection and sizing.