What is a minimally invasive mitral valve replacement?

A minimally invasive mitral valve replacement is a procedure to replace a poorly working mitral valve with an artificial valve without the need for open heart surgery. It's called minimally invasive because it uses a single small cut (incision) and special tools rather than a larger incision for the traditional open repair. This may lead to easier and faster recovery from surgery.

The heart has 4 valves. These valves help blood flow through the heart and out to the body by promoting forward flow and preventing backflow. The mitral valve is between the 2 chambers of the heart on the left side. These 2 chambers are the left atrium and the left ventricle. The valve allows blood to flow from the left atrium to the left ventricle in the heart. An artificial valve may be used to replace your poorly working mitral valve. This will make sure that blood can flow into the left ventricle and then flow out to the body normally. It does this without putting extra stress on the heart.

Why might I need a minimally invasive mitral valve replacement?

If the mitral valve isn't working well, you may need it fixed or replaced. Fixing the mitral valve is often possible. But sometimes it must be replaced.

Mitral valve stenosis and mitral valve regurgitation (also known as mitral valve insufficiency) are 2 different types of problems that might need valve replacement.

• Mitral valve stenosis. The valve can't open fully. This means less blood is able to move from the left atria into the left ventricle.

• Mitral valve regurgitation. The valve is leaky. Some blood leaks back into the left atrium instead of moving forward into the left ventricle.

These problems can lead to such symptoms as severe tiredness (fatigue), shortness of breath, fluid buildup in the legs (edema), fluid buildup in the lungs (pulmonary edema), and heart palpitations. If these symptoms are severe, or the valve is severely damaged, you may need valve repair or replacement.

Both mitral stenosis and mitral regurgitation can result from general aging of the valve. Other causes of mitral valve disease include:

• Coronary artery disease

• Infection of the heart valves

• Heart failure

• Rheumatic fever

• Congenital heart defect (something you are born with)

What are the risks of a minimally invasive mitral valve replacement?

Most minimally invasive mitral valve replacements are a success. But there are risks with any procedure. Your own risks will vary based on your overall health, age, and other factors. Possible risks include:

• Infection

• Bleeding

• Irregular heart rhythms, possibly requiring a lifelong (permanent) pacemaker

• Blood clots leading to stroke or heart attack

• Complications from anesthesia

• Damage to the arteries in the legs

• Delirium

• Inability to complete the procedure as planned, resulting in open heart surgery

• Death

Certain things increase the risk of complications, such as:

• Long-term (chronic) illness

• Other heart conditions

• Lung problems

• Being older

• Being obese

• Being a smoker

• Infections

• Vascular disease

Talk with your healthcare provider about any concerns that you have.

How do I get ready for a minimally invasive mitral valve replacement?

As you plan for the surgery, you and your healthcare provider will decide what kind of valve will work best for you. Your surgeon will replace your valve with a biological valve or a mechanical valve.

• Biological valves. These are made mainly from pig, cow, or human heart tissue. Biological valves may not last as long as mechanical valves. You'll need to take blood thinners for a time after surgery, but not for life.

• Mechanical valves. These are manmade. If you have a mechanical valve, you'll need to take blood thinners for the rest of your life. 

Talk with your healthcare provider about how to get ready for your upcoming surgery. Remember the following:

• Follow any directions you're given for not eating or drinking before your surgery.

• Try to stop smoking before your surgery. Ask your healthcare provider for ways to help.

• Ask your provider if you need to stop taking certain medicines before your surgery. Tell your provider if you often take blood-thinning medicines like warfarin or aspirin. Ask which medicines should be stopped before surgery, and when. Also ask which medicines should be continued.

• Tell your provider about all other medicines you're taking. This includes prescription and over-the-counter medicines. It also includes vitamins, herbs, and supplements.

• Tell your provider if you're sensitive to or are allergic to any medicines, iodine, latex, tape, or anesthetic agents (local and general).

• Tell your provider if you're pregnant, or think you could be pregnant.

Follow your healthcare provider's instructions about when to come to the hospital before your surgery. Ask any questions you have about the procedure.

You may also need some routine tests before the procedure to assess your health . These may include:

• Chest X-ray

• Electrocardiogram (ECG)

• Blood tests

• Echocardiogram

• Coronary angiogram to assess blood flow in your heart arteries

A short time before the procedure, you'll likely get medicines to help you relax. In most cases your surgery will proceed as planned. But sometimes another emergency might delay it.

What happens during a minimally invasive mitral valve replacement?

Check with your healthcare provider about the details of your procedure. In general, during your minimally invasive mitral valve replacement:

• A healthcare provider will give you anesthesia before the surgery starts. This will cause you to sleep deeply and not feel pain during the operation. Afterwards you won’t remember it.

• You'll be in the operating room for several hours. Family and friends should stay in the waiting room, so the surgeon can update them. A surgeon makes a small 2 to 4 inch incision in your chest to access the heart. The incision may be through the breastbone, to the right of your breastbone, or between the ribs on your side. The surgeon inserts special tools and a tiny camera through the incision to do the surgery. Some surgeons use robot-controlled arms to do the surgery. Your provider will review all of your options with you along with their risks and benefits.

• During the procedure, you'll be attached to a heart-lung machine by inserting cannulas into the artery and vein in your groin. This machine will act as your heart and lungs during the procedure.

• A transesophageal echocardiogram (TEE) probe will be inserted into your esophagus to allow the surgeon to look at the function of the valve before and after replacement.

• Your surgeon will remove your current mitral valve and replace it with a new one.

• Your heart will slowly be allowed to take over the work of circulation. It may need to be shocked into a regular rhythm.

• The surgery team will remove the heart-lung machine.

• The team will then sew or staple the incision in your skin back together.

What happens after a minimally invasive mitral valve replacement?

Next steps

Before you agree to the test or the procedure make sure you know:

• The name of the test or procedure

• The reason you are having the test or procedure

• What results to expect and what they mean

• The risks and benefits of the test or procedure

• What the possible side effects or complications are

• When and where you are to have the test or procedure

• Who will do the test or procedure and what that person’s qualifications are

• What would happen if you did not have the test or procedure

• Any alternative tests or procedures to think about

• When and how you will get the results

• Who to call after the test or procedure if you have questions or problems

• How much you will have to pay for the test or procedure