The mitral valve allows blood to flow from the left atrium to the left ventricle in the heart. A mitral valve replacement is a surgery to replace a mitral valve that doesn't work well. It's replaced with a new valve. It's an open heart surgery done with a cut (incision) in the middle of the chest that goes through your breastbone.

Before the surgery, you and your doctor will talk about what kind of valve will work best for you. You may be given a biological valve. This is a valve made from animal or human heart tissue. Or you may be given a mechanical valve. This is an artificial valve made from metal and other materials.

Each type of valve has different risks and benefits. Biological valves need to be replaced in 10 to 20 years. Mechanical valves are more durable and can last for a very long time, but you need to take blood thinner medicine for life. This is to help prevent clots that can form on the valve and may cause a stroke or cause the working part of the valve to become frozen and nonworking. Talk with your doctor about the kinds of follow-up care needed for each type.

Tell your doctor about all the medicines you take. This includes over-the-counter medicines, such as ibuprofen. It also includes vitamins, minerals, herbs, and other supplements or illegal drugs. And tell your doctor if you:

• Have had any recent changes in your health, such as an infection or fever.
• Are sensitive or allergic to any medicines, latex, tape, or anesthesia (local and general).
• Are pregnant or think you may be pregnant.

Before your surgery, you may need tests, such as:

• A chest X-ray.
• An electrocardiogram, to check the heart's rhythm.
• Blood tests to look at your general health.
• An echocardiogram to view heart anatomy and blood flow through the heart.
• A coronary angiogram to look at blood flow in your heart's arteries.

Talk with your doctor about how to get ready for your surgery. You may need to stop taking some medicines before the surgery, such as blood thinners and aspirin. If you smoke, you may need to stop before your surgery. Smoking can delay healing and increase your risk of complications. These include wound infections and breathing problems. Talk with your doctor if you need help to stop smoking.

Also, make sure to:

• Ask a family member or friend to take you home from the hospital. Don't drive yourself.
• Follow any directions you're given for not eating or drinking before surgery.
• Follow all other instructions from your doctor.

You'll be asked to sign a consent form that gives your permission to do the surgery. Read the form carefully. Ask questions if something isn't clear.

Your procedure will be done by a cardiac surgeon. This is a doctor who treats diseases of the heart. The surgeon will work with a team of specialized nurses and operating room staff. The surgery will take several hours. In general, you can expect the following:

• You will have general anesthesia, which is medicine that allows you to sleep through the surgery. You won't feel any pain during the surgery.
• An anesthesiologist will give you the general anesthesia and will watch your vital signs, like your heart rate and blood pressure, during the surgery.
• You will be hooked up to a heart-lung machine. This machine will act as your heart and lungs during the surgery.
• The surgeon makes a cut (incision) down the middle of your chest. To reach your heart, the surgeon separates the breastbone.
• The surgeon takes out your mitral valve. They replace it with a new valve.
• The surgery team takes you off the heart-lung machine.
• The team wires your breastbone back together. They close the incision in your chest with stitches, staples, or both. The team puts dressings on the incisions.

After surgery, you'll be taken to a recovery room or directly to the intensive care unit. Nurses will check your breathing, heart rate, and blood pressure. You may have a tube draining fluid from your chest. You may have a tube in your throat to help you breathe. This may be uncomfortable, and you won't be able to talk. The tube is usually removed within 24 hours. You may stay in the hospital for about 5 days.

You may have some pain at the incision site after surgery. You can take pain medicines to help relieve it. Only take pain medicine approved by your doctor.

In a day or two, you should be able to sit in a chair and walk with help. You may need to do breathing therapy to help prevent or remove fluid building up in your lungs. You can go back to your normal food as soon as you feel able.

Make sure you have someone to help at home for a while. When you go home, it may take a little while for you to resume normal activities. Don't do any vigorous exercise until your doctor says you are ready. Don't get the incision wet until your doctor gives you permission to do so. Don't lift anything heavy until your doctor says it's okay. Ask your doctor when it is safe for you to drive.

Take your temperature and weigh yourself every day. This is to check for infection and to make sure your heart is pumping normally. If it doesn't pump normally, fluid can build up in your body and quickly cause you to gain excess weight.

You will likely have your stitches or staples removed in 7 to 10 days. Make sure to go to all of your follow-up appointments. Follow all the instructions your doctor gives you for medicines, exercise, diet, and wound care.

Make sure all your dentists and other health care providers know about your new heart valve. You may need to take antibiotics before certain medical and dental procedures. This is to prevent getting an infection in your new valve.

If you have a mechanical valve, you will need to take blood thinner medicine. This is medicine that helps prevent clots. Blood thinners need frequent watching of levels, and certain foods and medicines can interact with these drugs. Make sure you know all about the blood thinners you are prescribed before you leave the hospital.

Contact your doctor right away if you have:

• A fever of 100.4°F (38°C) or higher, or as directed by your doctor.
• An increase in pain, redness, bleeding, or fluid leaking from the incision.
• A sudden change in weight.
• Other symptoms as advised.