Perforating the atretic pulmonary valve with CTO hardware: Technical aspects.

Area of Science:

• Cardiology
• Interventional Cardiology
• Pediatric Cardiology

Background:

• Pulmonary atresia with intact ventricular septum (PA-IVS) presents unique challenges for intervention.
• While radiofrequency and laser-assisted perforation exist, they are costly and require specialized expertise.
• Mechanical perforation offers a potentially more accessible alternative.

Purpose of the Study:

• To evaluate the efficacy and technical feasibility of using coronary chronic total occlusion (CTO) hardware for pulmonary valve (PV) perforation in PA-IVS patients.
• To assess the safety and outcomes of this novel interventional approach.

Main Methods:

• A mechanical catheter perforation technique using standard coronary CTO hardware was employed in nine PA-IVS patients.
• Procedures involved precise catheter alignment, guidewire crossing of the atretic segment, and graded balloon dilatation.
• A retrograde approach was utilized when antegrade crossing was not feasible.

Main Results:

• The procedure demonstrated an 89% success rate (8/9 patients), achieving successful valve opening and immediate reduction in right ventricular systolic pressures.
• One neonate experienced a fatal complication due to catheter-induced right ventricular perforation.
• All surviving patients were discharged in stable condition with improved oxygen saturation and no heart failure.

Conclusions:

• Pulmonary valve perforation utilizing readily available coronary CTO hardware is a technically feasible and successful strategy for PA-IVS.
• Careful patient and hardware selection are crucial for optimizing outcomes and minimizing risks.
• This method provides a valuable interventional option for managing PA-IVS.