What Happens When Your Heart's Aortic Valve Has Only One Flap?

Have you ever heard a doctor say that someone was born with a small heart problem? Or maybe you or a young family member felt short of breath or had chest pain, and the doctor found a heart valve issue.

Today, we will talk about a rare heart condition called a unicuspid aortic valve. Even though it is uncommon, knowing about it can help you understand how the heart works and what options exist if it affects you or a loved one.

What Is a Unicuspid Aortic Valve?

Normally, your heart's aortic valve has three small flaps, known as leaflets. But with a unicuspid aortic valve, the valve has only one leaflet. "Unicuspid" simply means having a single flap or cusp.

Think of these leaflets like little doors. They open and close to let clean, oxygen-rich blood flow out of your heart's left lower chamber—called the left ventricle—and into the main artery, called the aorta. The aorta then pumps that blood to your entire body. When the valve has fewer flaps, blood flow can face blockages.

People with a unicuspid aortic valve may also have other related heart conditions, such as:

• Aortopathy: Weakening of the walls of the main artery.
• Ventricular Septal Defect (VSD): A hole in the wall between the two lower chambers of the heart.
• Patent Ductus Arteriosus (PDA): A blood vessel near the heart that fails to close properly after birth.
• Coronary Artery Anomalies: Unusual patterns in the blood vessels that supply blood to the heart muscle.

This condition is very rare. It affects about 0.02% of the general population. It is also diagnosed more often in males than in females.

Are There Different Types?

Yes, doctors divide unicuspid aortic valves into two main types. The difference depends on the commissures, which are the spots where the valve edges connect to the wall of the aorta.

The two types include:

• Acommissural Type: This is the more severe form. There are no commissures or gaps at all, and the single leaflet is fused tightly to the aortic wall. Blood can only squeeze through a tiny pinhole opening.
• Unicommissural Type: This is more common and less severe. It features one commissure, meaning one small attachment point. When this valve opens, it often looks like a narrow slit.

✨ Wellness care Verified Partner

Natural Pain and Sleep Wellness Care

Herbal wellness products for back pain, joint pain and insomnia.

Check Availability →

What Are the Signs and Symptoms?

If an adult has a unicuspid aortic valve, common symptoms may include:

• Shortness of breath: Feeling out of breath during light exercise or when climbing stairs.
• Dizziness: Feeling lightheaded, especially when standing up quickly.
• Angina: having chest pain or tightness that can sometimes spread to your jaw, neck, or arm.
• Fainting spells: Passing out suddenly during exertion.

In infants, this condition often causes left-sided heart failure. Affected babies may also fail to gain weight or grow at a normal rate.

The severe acommissural type usually shows symptoms very early in infancy. However, people with the unicommissural type may not show any symptoms until they reach their 20s or 30s.

Why Does This Happen?

A unicuspid aortic valve happens before a baby is born. During pregnancy, the three normal valve flaps fail to separate properly and instead fuse together into a single structure.

Although researchers are still studying exact causes, many experts suspect it is an inherited condition linked to genetic factors passed down in families.

What Complications Can Happen Over Time?

Living with a unicuspid aortic valve can lead to several heart complications as you age, including:

• Aortic Stenosis: The valve becomes narrow and stiff, forcing your heart to work harder to pump blood.
• Aortic Regurgitation: The valve fails to close tightly, causing blood to leak backward into the heart.
• Infective Endocarditis: An infection of the inner heart lining and valves, which is more likely in abnormal heart structures.
• Aortic Dissection: A dangerous tearing of the inner layer of the aorta wall.

Important: Finding and treating these issues early helps prevent serious health complications.

How Is It Diagnosed?

When you visit a doctor, they will perform a physical exam and listen to your heart with a stethoscope. If they hear an unusual sound called a heart murmur, they may order further tests.

What Tests Are Done?

To confirm a unicuspid aortic valve, doctors rely on several imaging tests:

• Transthoracic Echocardiogram (TTE): A painless ultrasound of the chest that shows the heart's structure and valve movement.
• Transesophageal Echocardiogram (TEE): A specialized ultrasound where a thin probe passes down the throat to get clearer pictures of the heart valves.
• Cardiac CT Scan: A scan that creates detailed 3D cross-section images of your heart and aorta.
• Heart MRI: Uses magnetic fields to create clear pictures of heart tissue and blood flow.

How Is It Treated?

Treatment depends on your age and how severe your symptoms are.

For infants and young children, treatment options may include:

• Surgical Valvotomy: A surgery to cut fused valve tissue and create better openings.
• Valvuloplasty: A procedure using a tiny balloon to stretch open a narrow valve.
• Commissurotomy: Surgical separation of fused valve edges.
• Ross Procedure: A complex surgery explained in detail below.

For adults, treatment usually requires open-heart surgery to repair the unicuspid aortic valve or replace it with a new valve.

Treatment Comparison Overview

Are There Side Effects or Risks from Treatment?

Like any medical procedure, heart surgeries carry risks. However, your medical team will take every precaution to keep you safe.

Possible risks include:

• Infection at incision sites or inside the heart.
• Blood clots that can travel through blood vessels.
• Excessive bleeding during or after surgery.
• Endocarditis, an infection of the heart valve.
• Complete Heart Block: Interruption of the heart's electrical signals requiring a pacemaker.
• Heart attack or stroke risks.
• Abnormal heart rhythms (arrhythmias).

How Long Does Recovery Take?

Recovery time depends entirely on the type of surgery you undergo. It can range from one week to several months.

Your doctor will provide clear guidelines on when you can return to driving, work, and light physical activities.

What Is Life Like With This Condition?

If you have a unicuspid aortic valve, you will likely need surgery at some point in your life. You might even need more than one valve repair or replacement over the years.

Some patients take blood-thinning medicine, known as anticoagulants, after getting a mechanical heart valve. Remember that a unicuspid aortic valve does not go away on its own. It requires medical management and surgical correction when indicated.

There is also good news. Studies show that about 97% of patients who undergo aortic valve surgery for a unicuspid valve are still alive 10 years later.

For younger adults under 65, standard artificial valves may wear out faster. Therefore, surgeons often recommend the Ross Procedure for active, younger patients. During a Ross procedure, the surgeon moves your own healthy pulmonary valve into the aortic position, and replaces your pulmonary valve with a donor valve. This complex surgery yields great long-term results.

What Can You Do to Help Yourself?

After surgery, follow your doctor's instructions carefully regarding wound care, rest, and medicine schedules.

Attend all of your follow-up appointments. Regular checkups help your cardiologist monitor your heart health and catch any small problems early.

Questions to Ask Your Doctor.

When you meet with your cardiologist or surgeon, consider asking these helpful questions:

• What is the best treatment option for my specific heart valve condition?
• What are the differences between mechanical valves and tissue valves?
• How soon do I need to schedule my surgery?
• How long will my replacement valve last?

Finding out your heart valve needs attention can feel overwhelming. Fortunately, medical advances provide excellent treatments for unicuspid aortic valves. Talk openly with your doctor to find a care plan that fits your needs.