BMV – BALLOON MITRAL VALVOTOMY
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Balloon Mitral Valvotomy (BMV) is a highly specialized, minimally invasive procedure used to treat a narrowed mitral valve a condition known as mitral stenosis. In most cases, this narrowing is a long-term complication of rheumatic fever, which causes the valve’s flaps (leaflets) to thicken, become stiff, and fuse together over time. When the mitral valve cannot open fully, blood backs up into the lungs, leading to severe breathlessness, fatigue, and a racing heartbeat. During a BMV, a specialized balloon is used to gently crack open the fused leaflets, instantly restoring healthy blood flow from the upper to the lower chamber of the heart without the need for traditional open-heart surgery.
1. Indications:
BMV is the treatment of choice for patients with severe mitral stenosis who have a favorable valve anatomy. Common indications include:
- Moderate to severe mitral stenosis causing significant shortness of breath, especially during exertion or when lying down
- Extreme fatigue, weakness, or swelling in the legs and abdomen due to poor heart function
- A history of rheumatic heart disease resulting in fused mitral valve leaflets
- Pregnant women with severe mitral stenosis who require a safe, life-saving intervention to relieve symptoms and carry the pregnancy to term safely
- Patients who are deemed high-risk for open-heart mitral valve replacement surgery
- Patients whose preoperative tests (like a Transesophageal Echocardiogram or TEE) confirm there are no blood clots in the heart and no severe leaking (regurgitation) of the valve
Successfully widening the mitral valve dramatically improves lung congestion, boosts energy levels, and enhances your overall quality of life.
2. Procedure:
A BMV is performed in an advanced cardiac cath lab under local anesthesia and mild sedation, meaning you will remain awake but completely relaxed. A small puncture is made in a major vein in the groin (the femoral vein).
Through this access point, a thin, flexible catheter is navigated up to the right upper chamber of the heart using continuous X-ray imaging (fluoroscopy) and ultrasound guidance. Because the mitral valve is located on the left side of the heart, the cardiologist performs a precise technique called a “transseptal puncture” to gently pass the catheter through the thin wall separating the right and left upper chambers.
Once on the left side, a specialized, highly durable balloon (often called an Inoue balloon) is carefully positioned precisely across the narrowed mitral valve. The balloon is briefly and firmly inflated. Its unique shape applies precise pressure to the edges of the valve, snapping apart the fused leaflets and stretching the opening. The balloon is immediately deflated and removed. The procedure typically takes 1 to 2 hours, and you will notice an immediate improvement in your breathing.
3. Safety:
Balloon Mitral Valvotomy is a highly successful and safe alternative to open-heart surgery for the right candidates. It avoids a large chest incision and the use of a heart-lung bypass machine, resulting in significantly less pain and a much faster recovery time (most patients go home within 24 to 48 hours).
Continuous monitoring of your vital signs and heart rhythm is strictly maintained throughout the procedure. Possible but uncommon risks include:
- Bleeding, bruising, or a hematoma at the catheter insertion site in the groin
- Creation of a mitral valve leak (mitral regurgitation) if the valve leaflets are stretched too far, which in rare, severe cases may require surgical repair
- Irregular heartbeats (arrhythmias), such as atrial fibrillation, during or after the procedure
- A small risk of blood clots or stroke
- Injury or micro-tearing of the heart muscle during the transseptal puncture process (a rare complication carefully managed by the medical team)