Catheter based closure of ventricular septal defects

Area of Science:

• Cardiology
• Interventional Cardiology
• Medical Devices

Background:

• Catheter-based treatments for cardiac conditions are gaining prominence.
• Rikshospitalet has pioneered the adoption of these advanced techniques in Norway.
• This study evaluates catheter-based closure of ventricular septal defects (VSDs).

Purpose of the Study:

• To assess the efficacy and safety of catheter-based VSD closure.
• To analyze outcomes across different VSD types: post-infarction, muscular, and perimembranous.
• To compare catheter-based VSD closure with traditional open-heart surgery.

Main Methods:

• A review of 37 patients undergoing catheter-based VSD closure.
• Categorization of VSDs into post-infarction (2), muscular (10), and perimembranous (25).
• Analysis of procedural success rates, complications, and clinical outcomes.

Main Results:

• High success rate (96%) for perimembranous VSD closure, with one failure.
• Complete closure in 40% of muscular VSDs, with small, insignificant residual defects.
• Post-infarction VSDs showed clinical improvement with minor residual leaks.
• Complications included one complete heart block requiring a pacemaker and one left bundle branch block.

Conclusions:

• Catheter-based VSD closure is a safe and effective alternative to open-heart surgery.
• Particular caution is warranted for perimembranous VSD closure due to the risk of atrioventricular block.
• Further research may refine techniques to minimize complications and expand indications.