Understanding Heart Valve Disease: Types, Causes, and Treatment Options

Heart valve disease is a condition affecting the heart's valves—specifically the aortic, mitral, tricuspid, and pulmonary valves—which regulate blood flow through the heart's chambers and into the body. Proper valve function ensures that blood flows in a one-way direction. When a valve fails to open or close as needed, blood flow becomes disrupted, potentially leading to serious health issues.

There are two primary types of heart valve disease: stenosis and regurgitation. Stenosis refers to a narrowing of the valve, restricting blood flow and forcing the heart to work harder to push blood through. Regurgitation, or valve incompetence, occurs when a valve doesn’t fully close, allowing blood to leak backward, which also puts strain on the heart. Both conditions can lead to symptoms like fatigue, chest pain, shortness of breath, dizziness, and swelling in the legs or abdomen, caused by the heart's increased effort to maintain adequate blood circulation.

Heart valve disease can be either congenital, present from birth, or acquired. Acquired heart valve disease may develop from aging, where valves naturally thicken or weaken over time, or from infections such as rheumatic fever or endocarditis. Autoimmune disorders and cardiovascular diseases, like high blood pressure or heart attacks, also contribute to acquired heart valve issues. According to the American Heart Association, approximately 2.5% of people in the United States have some form of heart valve disease, with risk increasing significantly in those over 65.

Diagnosing heart valve disease requires imaging tests, often including echocardiograms and cardiac MRIs. These tools allow doctors to view valve structure and functionality in real time. In some cases, stress tests and cardiac catheterization may also be used to assess the severity of the disease and its impact on heart function.

Treatment options vary depending on disease severity. For mild cases, lifestyle changes and medications can help control symptoms and prevent progression. Medications such as anticoagulants, beta-blockers, or diuretics may be prescribed to manage blood pressure and reduce strain on the heart. Advanced cases might require surgical interventions like valve repair or replacement. Minimally invasive procedures, including transcatheter aortic valve replacement (TAVR), have improved outcomes and recovery times for high-risk patients, allowing more options for those who cannot undergo open-heart surgery.

Early detection and treatment of heart valve disease are essential to maintaining heart health, preventing complications like heart failure or arrhythmias, and improving quality of life.
Understanding Heart Valve Disease: Types, Causes, and Treatment Options

What is bacterial endocarditis?

Infection of the heart valves is called infective or bacterial endocarditis. Usually the infection is by bacteria, thus the term bacterial endocarditis, but infections caused by fungi, Coxiella or Chlamydia can occur thus the term infective endocarditis is used by many physicians.

Several types of bacteria can cause bacterial endocarditis. It has been known for a long time that bacteria occasionally gain access to the blood vascular system of the body. Usually these invaders are quickly destroyed by the leucocytes or white cells of the blood.

In susceptible individuals, bacterial endocarditis can begin weeks or months after simple manipulation such as scaling and cleaning of teeth, other dental work, and surgery in areas of the body where infection may gain access.

Valve damage can occur when bacteria lodge on their surface, resulting in local destruction and valve dysfunction. Bacteria cast into the bloodstream from valve infections can spread throughout the body and present a host of confusion symptoms for the diagnostician.

Bacterial endocarditis accounts for 2% of all organic heart disease. A patient with bacterial endocarditis has an excellent chance for survival with prompt treatment.
What is bacterial endocarditis?