Purpose: A heart valve replacement surgery is required in the following conditions:
- Stenosis: The narrowing of the blood vessels, leading to a lesser amount of blood flowing to the heart is known as stenosis. The muscles need to work harder in such cases.
- Regurgitation: Leaky valves cause the valve to remain open slightly, instead of closing tightly. This leads to the backward flow of blood. This condition is known as regurgitation.
Causes: The various causes of heart valvular diseases, which may require a heart valve replacement surgery include:
- Congenital condition (present during birth)
- Increase in age
- Prolapse (floppy flaps of the valves)
- Presence of holes in the flaps
- Endocarditis (valve infection)
- Rheumatic fever (a type of bacterial throat infection)
- Hypertension (high blood pressure)
- Aortic aneurysm (dilation of the aorta, which is the main blood vessel of the heart)
- Tumors
- Use of some types of medications
- Radiation therapy (a form of cancer treatment)
- Chronic or long-term inflammatory conditions
Symptoms: The following symptoms indicate a heart valve disease, which may require a heart valve replacement surgery:
- Shortness of breath
- Weakness
- Lightheadedness
- Dizziness
- Chest pain
- Retention of fluid, especially in the lower limbs
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Physical examination: The doctor will note down your symptoms and medical history, and evaluate you physically.
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Blood tests and urine tests: These tests help in checking for any underlying medical condition or infections that may be present.
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Imaging tests: Imaging tests like chest x-ray, CT scan, and MRI scan help in obtaining clear images of the heart.
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Echocardiogram: Sound waves are used for creating images of the heart in motion. This helps the doctor in checking the blood flow through the heart and heart valves.
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Electrocardiogram (ECG or EKG): This test helps in the measurement of the heart’s electrical activity. It helps diagnose heart problems.
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Stress test: The symptoms of the patient are noted during some physical activity or by the use of some medications.
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Cardiac catheterization: A thin tube, called a catheter, is inserted through a blood vessel in the groin or arm region, and then guided to an artery in the heart. A dye is injected by the surgeon through the catheter to make the artery more visible on an x-ray. This helps the doctor to obtain a clear image of the arteries in the heart, and how well the heart functions. It also helps in the measurement of the pressure inside the chambers of the heart.
A heart valve replacement surgery can be done in the following ways:
1. Open heart surgery:
- This procedure is usually performed under general anesthesia (the patient is asleep during the surgery).
- The surgeon makes a six-to-eight-inch opening in the chest region.
- The surgeon will split open the breastbone.
- The heart stops functioning and a heart-lung bypass machine now takes over the function of pumping blood.
- The damaged valve is removed by the surgeon. It is replaced by a mechanical or biological valve.
- The heart is now restarted.
- The chest incision is closed up using sutures (stitches).
- The procedure is completed in two to four hours.
2. Minimally invasive procedure:
- The surgeon makes small incisions (cuts) of about 2 to 4 inches.
- The procedure is done without opening the chest.
- The incisions are normally made in a J-shaped pattern.
- The damaged heart valve is removed and replaced.
- A minimally-invasive surgery causes less trauma, bleeding, and pain compared to open surgery. It also has a quicker recovery.
The complications of a heart valve replacement surgery could include:
- Infection
- Bleeding
- Heart attack
- Stroke (stopping of blood supply to the brain)
- Arrhythmias (the irregular rhythm of the heart)
- Valve dysfunction of the replaced valves
- Lung problems
- Pneumonia
- Death
- The patient is kept in the ICU for a couple of days after the procedure, where the vital parameters of the patient are monitored.
- The patient is then moved to a regular hospital room, once intensive care monitoring is not needed.
- The patient usually goes home three to ten days after the procedure.
- It is normal to have some pain, bleeding, and swelling after the procedure.
- The doctor will prescribe pain-relieving medications to relieve your pain after the surgery.
- Follow-up appointments with your doctor will include check-ups and lab tests like x-rays, echocardiogram, and ECG, to check the healing.
- If the doctor has placed a mechanical valve, you will need to take blood-thinning medications for the rest of your life.
- The breastbone will take about 6 to 8 weeks to heal.
- Complete recovery may take about 3 months.
- The doctor may suggest mild to moderate exercises to help you recover fast.
- Avoid heavy lifting and strenuous physical activities for some weeks after the procedure.
- If you have a desk job, you can return to work within 6 to 8 weeks of the procedure. In case of a job requiring more physical work, you may only return to work three months after the procedure.