There are four types of valves in the human heart – the mitral, aortic, tricuspid, and pulmonary valve. The mitral and the tricuspid valve are present between the upper and the lower chambers of the heart. On the other hand, the aortic and the pulmonary valve are present in the two arteries that leave the heart.
Most often, it is the mitral and the aortic valve that undergoes certain pathologic changes due to degenerative valve diseases, rheumatic heart diseases, or infective endocarditis. This may result in problems associated with the valve opening and closure.
These dysfunctions can be treated with either valve repair or valve replacement surgery. Aortic valve replacement or mitral valve replacement is carried out when just one of the valve is diseased or damaged. However, when both the valves are diseased or damaged, a double valve replacement surgery is conducted.
About the ailment
The heart valves present in the heart are responsible for permitting the flow of nutrient-laden blood through the heart chambers. After allowing the ushering of blood, each valve is expected to close completely. The diseased or damaged valves are not able to open and close properly, thus allowing the mixing and backflow of blood (regurgitation).
A double valve replacement surgery mainly aims at correcting the problem of valvular heart disease and involves both aortic valve replacement and mitral valve replacement. The mitral valve is situated between the left atrium and the left ventricle while the aortic valve is located in between the aorta and the left ventricle.
Causes of Heart Valve Disease
Some of the causes of heart valve disease include the following:
- Cardiac stenosis or narrowing
- High blood pressure and heart failure, which enlarges the heart and arteries and contribute to valvular diseases
- Atherosclerosis
- Scar tissue formation and damage due to heart attack or any injury to the heart
- Strep throat or rheumatic fever can give rises to valve problems
- Infection due to germs entering bloodstream can affect heart valves and one such infection is infective endocarditis
- Lupus-like autoimmune diseases can affect the aorta and mitral valve
- Carcinoid syndrome
- Diet medicines such as fenfluramine and phentermine can at times give rise to valve diseases
- Marfan syndrome
- Metabolic disorders such as Fabry disease or high blood cholesterol
- Radiation therapy to the chest can give rise to heart valve diseases.
Symptoms of Double Valve Replacement
Some of the symptoms of valvular heart disease include the following:
- Fluid retention in the lower limbs
- Chest pain
- Fatigue and light-headedness
- Dizziness and shortness in breath
- Cyanosis
About heart valve replacement
Double valve replacement surgery is a complicated procedure as compared to single valve replacement surgery. Aortic valve replacement and mitral valve replacement involves the replacement of just one valve but during double valve replacement surgery, both the diseased valves are removed at the same time and replaced with a synthetic (mechanical) or a biological valve.
In the case of mechanical valves, the components used are not of organic or natural origin. They are created from a combination of polyester and carbon material that the human body can tolerate and accept. Blood-thinning medications are given to patients who get mechanical valves to prevent blood clot formation.
Bioprosthetic valves or the biologic valves are either created from animal or human tissues and can be of the following types:
- A bovine valve is usually derived from the tissues of a cow and is connected to the heart with the help of silicone rubber
- A porcine valve has its origin rooted from a pig tissue and is implanted in the heart with or without the frame like a stent
- A homograft or an allograft is usually collected from the human donor’s heart
The choice of a particular type of valve depends on the age, overall fitness, and the ability to metabolize anticoagulant medications. The only problem associated with a bioprosthetic valve is that it may not last a lifetime and one may have to undergo a replacement again later.