Diagnosing cardiac valve disease involves a combination of physical examinations, imaging tests, and heart function assessments that help doctors understand which valve is affected and how severely. Early detection can make a significant difference in managing this condition effectively.

Introduction: Who Should Undergo Diagnostics

Many people with cardiac valve disease may not experience any symptoms for years, which makes knowing when to seek medical attention particularly important. If you notice symptoms such as shortness of breath during normal activities or while lying down, unusual fatigue that limits your daily routine, chest discomfort, dizziness, fainting episodes, or swelling in your ankles and feet, it’s time to schedule a health checkup.^[1] These warning signs suggest that your heart may not be pumping blood as efficiently as it should.

You should also consider diagnostic testing if your healthcare provider detects a heart murmur, which is an abnormal whooshing sound heard through a stethoscope when blood flows through your heart. While heart murmurs can be harmless, they may also indicate that a valve isn’t opening or closing properly.^[8] Even if you feel perfectly fine, a heart murmur discovered during a routine physical exam warrants further investigation to rule out valve problems.

Regular checkups become especially important as you get older, since age is one of the main risk factors for developing valve disease. The heart valves can become thick and stiff over time, leading to problems with blood flow.^[4] If you have a family history of early heart disease, such as a father or brother who had heart problems before age 55, or a mother or sister who developed heart disease before age 65, you should discuss screening for valve disease with your doctor even without symptoms.^[4]

People with certain medical conditions also need closer monitoring for heart valve disease. If you’ve had rheumatic fever (a complication of untreated strep throat), a heart attack, endocarditis (an infection of the heart’s inner lining), high blood pressure, high cholesterol, diabetes, or coronary artery disease, your risk of developing valve problems increases substantially.^[2] Additionally, if you were born with a heart valve that didn’t form correctly, such as a bicuspid aortic valve that has two flaps instead of three, regular diagnostic testing helps track any changes over time.^[3]

Classic Diagnostic Methods

The journey to diagnosing cardiac valve disease typically begins with a thorough physical examination and a detailed conversation about your medical history. Your doctor will ask about your symptoms, when they started, how they’ve progressed, and whether anything makes them better or worse. They’ll also inquire about any family history of heart problems, previous illnesses like rheumatic fever, and other health conditions that might affect your heart.^[9]

During the physical exam, your doctor will listen to your heart using a stethoscope. This simple but powerful tool can detect abnormal sounds called heart murmurs, which occur when blood flows turbulently through a narrowed or leaky valve.^[8] Your doctor will also check for signs of heart valve disease in other parts of your body, such as fluid buildup in your lungs, swelling in your ankles and feet, or an enlarged heart.

Echocardiogram

The echocardiogram is the most important imaging test for diagnosing heart valve disease. This test uses ultrasound technology—the same type of sound waves used to see babies before birth—to create moving pictures of your beating heart. An echocardiogram shows how blood flows through your heart chambers and across your valves, allowing doctors to see if a valve is narrowed, leaky, or not closing properly.^[9]

There are several types of echocardiograms, each providing different information. A transthoracic echocardiogram (TTE) is the most common type. A technician places a device called a transducer on your chest, which sends sound waves through your chest wall to your heart. This test is completely painless and takes about 30 to 60 minutes.^[8]

When doctors need clearer, more detailed images, they may recommend a transesophageal echocardiogram (TEE). For this test, you’ll receive medication to help you relax, and a thin tube with an ultrasound device at its tip is gently guided down your throat into your esophagus, which sits right behind your heart. Because the transducer is much closer to your heart, the images are sharper and show more detail than a standard echocardiogram.^[8] Some medical centers also use three-dimensional echocardiography, which provides even more precise information about valve structure and function.^[16]

Electrocardiogram

An electrocardiogram, also called an ECG or EKG, records the electrical signals that control your heartbeat. Small sensors called electrodes are attached to your chest and sometimes your arms and legs. These sensors connect to a machine that prints out a pattern showing your heart’s electrical activity. This quick, painless test helps doctors see if your heart is beating regularly and if the heart chambers are enlarged—a sign that they’re working harder than normal to pump blood through a diseased valve.^[9]

Chest X-Ray

A chest X-ray creates a picture of your heart and lungs using a small amount of radiation. This test can reveal if your heart is larger than it should be, which happens when the heart muscle thickens or stretches in response to valve disease. A chest X-ray can also show if fluid has backed up into your lungs, which occurs when a valve problem prevents blood from flowing smoothly through your heart.^[9]

Cardiac MRI

A cardiac MRI uses powerful magnets and radio waves to create extremely detailed images of your heart. Unlike X-rays or CT scans, this test doesn’t use radiation. During a cardiac MRI, you lie inside a large tube-shaped machine for about 30 to 90 minutes while it takes pictures of your heart from different angles. This test helps doctors determine exactly how severe your valve disease is and how well your heart is functioning despite the problem.^[9]

Exercise and Stress Tests

Sometimes valve problems only cause symptoms during physical activity. For this reason, doctors may ask you to exercise while monitoring your heart. During an exercise stress test, you’ll walk on a treadmill or pedal a stationary bike while wearing electrodes that track your heart’s electrical activity. Doctors watch how your heart responds to the increased workload and whether you develop symptoms like shortness of breath or chest discomfort during the test.^[9]

A stress echocardiogram combines exercise with ultrasound imaging. The technician takes echocardiogram images before you exercise, during peak activity, and after you stop. This shows doctors how your valve disease affects your heart’s ability to pump blood when you need it most.^[8] If you can’t exercise due to other health problems, your doctor can give you medication that makes your heart work harder, mimicking the effects of exercise.^[9]

Cardiac Catheterization

Although less commonly used today for diagnosing valve disease, cardiac catheterization provides valuable information in certain situations. During this procedure, a doctor inserts a thin, flexible tube called a catheter into a blood vessel in your arm or leg and carefully guides it to your heart. The catheter can measure pressures inside your heart chambers and across your valves, showing exactly how much your valve disease is affecting blood flow.^[16] The doctor may also inject a special dye that shows up on X-rays, creating detailed pictures of your heart arteries and valves. This test is particularly useful when doctors suspect you have both valve disease and blockages in your coronary arteries.^[9]

Additional Imaging Tests

Advanced imaging techniques can provide even more information about your heart valves. A cardiac CT scan uses X-rays taken from many angles and combines them with computer processing to create three-dimensional images of your heart. This test is especially helpful for evaluating the structure of your heart and the condition of your aorta, the large blood vessel that carries blood from your heart to the rest of your body.^[16]

Some specialized centers use intracardiac echocardiography, where a tiny ultrasound device on a catheter is placed inside your heart during certain procedures, providing real-time images that guide treatment.^[8] These advanced techniques help doctors plan the safest and most effective treatment for your specific valve problem.

Diagnostics for Clinical Trial Qualification

Clinical trials test new treatments and procedures for heart valve disease before they become widely available. Getting into a clinical trial requires meeting specific criteria, and diagnostic tests play a central role in determining whether you qualify. The tests used for clinical trial screening are often the same ones used for standard diagnosis, but the results must meet precise thresholds defined by the research protocol.

Most clinical trials for heart valve disease require participants to have their diagnosis confirmed through echocardiography. Researchers need to know the exact severity of your valve problem—whether you have mild, moderate, or severe stenosis or regurgitation. They measure specific parameters such as the size of the valve opening, the amount of blood leaking backward, and how well your heart is pumping despite the valve problem.^[8] These measurements must fall within the ranges specified in the trial’s inclusion criteria.

Clinical trials often require baseline measurements of your heart’s overall function. This typically includes an assessment of your ejection fraction, which is the percentage of blood your heart pumps out with each beat. A normal ejection fraction is usually between 50% and 70%. If your ejection fraction is lower, it means your heart muscle has been weakened, which might affect whether you qualify for certain trials or which treatment group you’re assigned to.

Many trials require exercise testing to objectively measure how valve disease limits your physical activity. You might need to complete a six-minute walk test, where researchers measure how far you can walk in six minutes, or undergo a cardiopulmonary exercise test that measures how efficiently your body uses oxygen during exercise.^[16] These tests help researchers understand the functional impact of your valve disease and track whether the experimental treatment improves your exercise capacity.

Blood tests are another standard component of clinical trial screening. Researchers need to know about other aspects of your health that might affect your ability to participate safely or influence the study results. Common blood tests include a complete blood count to check for anemia, tests of kidney and liver function, cholesterol levels, and markers of heart stress such as BNP (brain natriuretic peptide) or NT-proBNP, which rise when your heart is working too hard.^[16]

If the clinical trial involves a procedure to repair or replace your valve, you’ll likely need advanced imaging such as a cardiac CT scan or transesophageal echocardiogram. These tests help doctors determine whether your anatomy is suitable for the new technique being studied. For example, trials of catheter-based valve replacement procedures need to ensure that your blood vessels are large enough to accommodate the catheters and that your heart’s structure will allow the new valve to be positioned correctly.

Some trials have specific requirements about how recently your diagnostic tests must have been performed. You might need to have your echocardiogram repeated within a certain number of days before the trial begins to ensure the researchers have current information about your condition. This is particularly important because valve disease can worsen over time, and treatment decisions should be based on your current status, not on test results from months ago.