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PATIENT INFORMATION

Congenital Heart Disease

PATIENT INFORMATION

Congenital Heart Disease

THE BASICS ON CONGENITAL HEART DISEASE

Congenital means present at birth. So congenital heart disease (CHD)—or congenital heart defects (CHD)—refer to a problem with the heart’s structure that is present at birth. Such defects are not rare; they occur in nearly 1 out of 100 newborn infants.1

Depending on the specific type of disease, blood flow through the heart can be slower than usual, flow in the wrong direction or to the wrong place, or be blocked completely.

There are at least 35 types of congenital heart disease, and we cannot cover all of them here. We will briefly summarize the major types of CHD that are associated with:

  • Heart valves
  • Small holes that allow blood to flow improperly from one heart chamber to another

HEART’S STRUCTURE: CHAMBERS AND VALVES

Let’s begin by looking at the structure of the heart. The heart has 4 chambers. The atria are the smaller chambers on the top, and the ventricles are the larger chambers on the bottom:

  • Right atrium receives blood from the body that is low in oxygen.
  • Right ventricle pumps that low-oxygen blood to the lungs, where the blood is filled with oxygen.
  • Left atrium receives the oxygen-rich blood from the lungs.
  • Left ventricle pumps that oxygen-rich blood out to the entire body.


To move blood into or out of the 4 chambers, the heart has 4 valves:

  • Tricuspid valve allows oxygen-depleted blood to flow from the right atrium to the right ventricle.
  • Pulmonary valve pumps blood from the right ventricle to the lungs, where the blood receives oxygen.
  • Mitral valve allows oxygen-rich blood to flow from the left atrium to the left ventricle.
  • Aortic valve pumps that oxygen-rich blood from the left ventricle out to the entire body.
Diagram of heart structure

CONGENITAL HEART DISEASE IN HEART VALVES

Here are two common congenital problems that affect valves. Both involve stenosis, a narrowed opening in the heart valve. When the heart doesn’t open as fully as it should, it can cause damage to the heart.

  • AORTIC VALVE STENOSIS

    Aortic valve stenosis is a narrowed aortic valve. A valve with stenosis cannot open as much as it should to allow for blood flow. Stenosis makes the left ventricle pump harder to get blood through the valve and out to the body. Over time this can damage the overworked heart muscle.

    Usually this type of congenital heart valve disease is due to a bicuspid valve. A bicuspid aortic valve is narrowed because instead of having 3 flaps that open for blood flow, it has only 2 flaps. The other 2 flaps are fused together.

    Normal aortic valve without stenosis, open
    Open (top view)
    Normal aortic valve without stenosis, closed
    Closed (top view)
    Aortic valve stenosis, bicuspid
    Bicuspid aortic valve
  • PULMONARY VALVE STENOSIS

    With this condition, the pulmonary valve doesn’t open fully. As the right ventricle tries to pump blood out of the pulmonary valve, pressure in the ventricle becomes much higher than normal. The heart then must work harder to pump blood into the arteries in the lung. Over time this can damage the overworked heart muscle.

CONGENITAL HEART DISEASE IN OTHER HEART STRUCTURES

Several types of congenital heart disease involve openings or holes that allow blood to flow in the wrong direction. Here are some common defects in this category. In the first two examples below, the hole occurs in the septum (wall) that separates the heart’s chambers.

  • ATRIAL SEPTAL DEFECT (ASD)

    This is a hole in the wall that separates the right atrium and left atrium. The hole increases the amount of blood that flows through the lungs.

    Over time, this may damage the blood vessels in the lungs.

    Atrial septal defect
  • VENTRICULAR SEPTAL DEFECT (VSD)

    This is a hole in the wall that separates the right ventricle and left ventricle. The hole allows blood to seep from the left to the right ventricle. This extra blood being pumped into the lungs forces the heart and lungs to work harder. Eventually this defect can increase the risk for other health problems:

    • Heart failure
    • Stroke
    • Pulmonary hypertension (high blood pressure in the lungs)
    • Arrhythmias (irregular heart rhythms)
    Ventricular septal defect
  • PATENT DUCTUS ARTERIOSUS

    A patent ductus arteriosus (PDA) occurs when there is a connection between the heart’s two major arteries. Usually this opening closes soon after birth.

    When it does not, the hole allows oxygen-rich blood from the aorta to mix with oxygen-poor blood in the pulmonary artery.

    Patent ductus arteriosus
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Proven PDA closure for patients 700G and up.

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WHEN IS CONGENITAL HEART DISEASE DIAGNOSED?

Severe problems are usually diagnosed soon after birth. This is aided by a common practice in the U.S. to screen each newborn for CHD. In other cases the heart defects have few or no symptoms. They are often not diagnosed until patients are older, or sometimes in adulthood.

  • WHAT CAN CAUSE CONGENITAL HEART DISEASE?

    For most infants, the cause is unknown. In some cases the defect could be caused by problems with the genes or chromosomes.

    Less commonly, the defect could be linked to the mother’s overall health, activities, or illnesses during pregnancy:

    • Having rubella (German measles)
    • Being obese or having diabetes
    • Using certain medications during pregnancy (for instance, angiotensin-converting enzyme [ACE] inhibitors for high blood pressure)
    • Smoking or being around secondhand smoke

SYMPTOMS OF CONGENITAL HEART DISEASE

The symptoms vary depending on the type of disease and at what age the patient, family member, or doctor notices symptoms. When the defects are minor there may be no symptoms. In the list below, the symptoms apply mostly to young children and infants.
Some symptoms apply to infants only, as noted. However, adults with untreated heart defects can also have some of these same symptoms.

  • SYMPTOMS DEPENDING ON TYPE OF DISEASE
    SymptomsOccurs in Atrial Septal Defects (ASD) • Ventricular Septal
    Defects (VSD) • Patent Ductus Arteriosus
    (PDA) • Aortic Stenosis • Pulmonary Stenosis
    A heart murmur (whooshing sound that a
    doctor can hear with a stethoscope)    		ASD, VSD, PDA, Aortic Stenosis, Pulmonary Stenosis
    Frequent respiratory or lung infectionsASD
    StrokeASD
    Swelling of the legs, feet, or stomachASD
    Difficulty breathingASD, VSD, PDA
    Fast or heavy breathingVSD, PDA, Aortic Stenosis
    FatigueAortic Stenosis, Pulmonary Stenosis
    Fatigue when feeding (infants)ASD, VSD
    Shortness of breath when being activeASD, PDA, Pulmonary Stenosis
    Palpitations (a sense of feeling the heartbeat)ASD
    Poor feeding and poor weight gainASD, VSD, PDA, Aortic Stenosis, Pulmonary Stenosis
    Sweating when eating or crying (infants)VSD, PDA
    FussinessAortic Stenosis
    Poor urine outputAortic Stenosis
    Chest painAortic Stenosis, Pulmonary Stenosis
    Syncope (fainting)Aortic Stenosis, Pulmonary Stenosis
    Cyanosis (bluish skin)ASD, Pulmonary Stenosis
    Swelling of the abdomenPulmonary Stenosis

TREATMENTS FOR CONGENITAL HEART DISEASE

Some types of disease, such as the holes that occur with ASD, VSD, and PDA, may close on their own in the first few days after birth. If this does not happen, a small hole may not need to be treated. Treatment for any type of disease, including valves, depends on the patient’s symptoms.

  • WATCHFUL WAITING

    If a defect is small, and if the person has few to no symptoms, a doctor might advise waiting to see if the defect might improve over time. This may be done especially for a VSD, which can close in the first few years of life.

  • MEDICATIONS

    Medications can help relieve the symptoms. For some types of congenital heart disease—PDA for instance—the medication may even close the defect.

  • CATHETERIZATION

    During a cardiac catheterization, the doctor inserts a catheter (a long, very thin tube) into a blood vessel in your leg. The doctor guides the catheter to your heart to make the repair. For certain people this procedure can:

    • Treat a valve with stenosis. This is done by inserting and inflating a small balloon in the valve. This procedure, called a valvuloplasty, widens the valve and allows it to work properly.
    • Repair the abnormal openings in the heart: ASD, VSD, PDA.
    • Close the abnormal openings in the heart. With PDA, for instance, a very small closure device can be inserted into the catheter. When positioned inside the hole, the device is released and can close the opening.
  • OPEN-HEART SURGERY

    Sometimes open-heart surgery is the best form of treatment, especially if the person has a number of types of congenital heart disease.

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The information provided is not intended for medical diagnosis or treatment as a substitute for professional advice.  Consult with a physician or qualified healthcare provider for appropriate medical advices.

MAT-2115453 v2.0 | Item approved for U.S. use only.

References
  1. Centers for Disease Control and Prevention. Congenital heart defects. https://www.cdc.gov/ncbddd/heartdefects/data.html. Updated January 8, 2018.
Important Safety Information
  • AMPLATZER PICCOLO™ OCCLUDER

  • AMPLATZER PICCOLOTM OCCLUDER
    INDICATIONS AND USAGE

    The AMPLATZER PiccoloTM Occluder is a percutaneous, transcatheter occlusion device intended for the nonsurgical closure of a patent ductus arteriosus (PDA).

    CONTRAINDICATIONS

    Weight < 700 grams at time of the procedure; Age < 3 days at time of procedure; Coarctation of the aorta; Left pulmonary artery stenosis; Cardiac output that is dependent on right to left shunt through the PDA due to pulmonary hypertension; Intracardiac thrombus that may interfere with the implant procedure; Active infection requiring treatment at the time of implant; Patients with a PDA length smaller than 3 mm; Patients with a PDA diameter that is greater than 4 mm at the narrowest portion

    POTENTIAL ADVERSE EVENTS

    Potential adverse events that may occur during or after a procedure using this device may include, but are not limited to: Air embolus, Allergic reaction, Anemia, Anesthesia reactions, Apnea, Arrhythmia, Bleeding, Cardiac perforation, Cardiac tamponade, Chest pain, Device embolization, Device erosion, Death, Endocarditis, Fever, Headache/migraine, Hemolysis, Hematoma, Hypertension, Hypotension, Infection, Myocardial infarction, Palpitations, Partial obstruction of aorta, Partial obstruction of pulmonary artery, Pericardial effusion, Pericarditis, Peripheral embolism, Pleural effusion, Pulmonary embolism, Re-intervention for device removal, Respiratory distress, Stroke, Thrombus, Transient ischemic attack, Valvular regurgitation, Vascular access site injury, Vascular occlusion, Vessel perforation

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