Percutaneous mitral balloon dilatation by a new sequential single- and double-balloon technique

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiac Surgery

Background:

• Rheumatic mitral stenosis significantly obstructs blood flow from the left atrium to the left ventricle.
• Severe mitral stenosis impairs cardiac output and can lead to heart failure.
• Percutaneous balloon valvotomy is a common treatment, but optimal techniques are continuously explored.

Purpose of the Study:

• To evaluate a novel sequential single- and double-balloon dilatation technique for severe rheumatic mitral stenosis.
• To assess the efficacy and safety of this new percutaneous balloon valvotomy approach.

Main Methods:

• A sequential single- and double-balloon dilatation procedure was performed in 23 patients with severe rheumatic mitral stenosis.
• Initially, a small balloon was used for primary dilatation, followed by a larger double-balloon technique to maximize mitral valve area (MVA).

Main Results:

• The procedure was successful in all patients, significantly increasing MVA from 0.8 ± 0.2 to 1.9 ± 0.4 cm² (p < 0.01).
• Mitral valve pressure gradient decreased from 19 ± 6 to 5 ± 2 mm Hg, and cardiac output increased from 4.0 ± 0.5 to 5.2 ± 0.6 L/min.
• An effective balloon dilatation diameter of 24.8 mm or more was necessary for optimal results. Mild mitral regurgitation and small atrial septal defects were observed in a few patients.

Conclusions:

• The sequential single- and double-balloon dilatation is an effective method for increasing MVA and improving hemodynamics in severe mitral stenosis.
• This technique offers a viable percutaneous option for managing severe mitral stenosis, with larger balloon diameters correlating with better outcomes.