Restenosis After Pulmonary Vein Stenting Following Pulmonary Vein Isolation With Nonobstructive General Angioscopy

Area of Science:

• Cardiovascular Interventions
• Medical Imaging
• Electrophysiology

Background:

• Pulmonary vein (PV) stenosis is a potential complication following PV isolation for atrial fibrillation.
• In-stent restenosis can occur after treating PV stenosis with stents, necessitating advanced imaging and treatment strategies.

Purpose of the Study:

• To report a case of recurrent pulmonary vein stenosis after stenting.
• To highlight the utility of nonobstructive general angioscopy (NOGA) in visualizing neointimal hyperplasia and drug delivery in pulmonary veins.

Main Methods:

• A 33-year-old male patient with atrial fibrillation underwent PV isolation and subsequent stenting for PV stenosis.
• Intravascular ultrasound and NOGA were used to assess restenosis and neointimal hyperplasia.
• Drug-coated balloon angioplasty was performed, with NOGA used to confirm paclitaxel deposition.

Main Results:

• In-stent restenosis occurred 2 years after initial stenting, characterized by severe ostial stenosis and neointimal hyperplasia.
• NOGA provided direct visualization of neointimal changes and confirmed successful paclitaxel delivery via drug-coated balloon angioplasty.
• This case is the first to demonstrate in-stent restenosis and post-drug-coated balloon changes in the pulmonary vein using NOGA.

Conclusions:

• NOGA is a valuable tool for assessing neointimal hyperplasia and guiding treatment in pulmonary vein stenosis.
• NOGA offers direct visualization of drug delivery, which is not possible with intravascular ultrasound alone.
• This case underscores the potential of NOGA in managing complex pulmonary vein stenosis complications.