Babies born with hypoplastic left heart syndrome often appear to be normal at birth. The signs and symptoms begin to show effect after the first few hours. The following are the signs and symptoms of this congenital condition:
Entire Body System
From Wikidata Jump to navigation Jump to search congenital heart disease characterized by abnormal development of the left-sided structures of the heart edit Language Label Description Also known as English hypoplastic left heart syndrome congenital heart [wikidata.org]
Congenital heart diseases with right-to-left intracardiac shunts can be complicated by brain abscesses via paradoxical embolism of infected microthrombi. [ncbi.nlm.nih.gov]
[…] is a response to cold (this reaction is called peripheral cyanosis). [nlm.nih.gov]
This report describes an infant with heterotaxy syndrome and severe hypoplasia of the left heart who presented with profound cyanosis at birth despite a large patent ductus arteriosus. [ncbi.nlm.nih.gov]
Signs and symptoms include tachypnea, cyanosis, dyspnea, and lethargy Applies To Atresia, or marked hypoplasia, of aortic orifice or valve, with hypoplasia of ascending aorta and defective development of left ventricle (with mitral valve atresia) ICD- [icd9data.com]
Symptoms Symptoms of hypoplastic left heart syndrome include cyanosis, rapid heart rate, arrhythmias, lethargy, poor pulse rate, poor sucking, and shortness of breath and cold extremities. [symptoma.com]
Decreased Diastolic Blood Pressure
This results in decreased diastolic blood pressure in the aortic root, and thus decreased coronary arterial perfusion. [ncbi.nlm.nih.gov]
An ultrasound examination during the second trimester of pregnancy can reveal presence of hypoplastic left heart syndrome . This imaging modality can be enhanced by the use of color Doppler studies . After birth, a thorough physical examination would reveal heart failure. In case of heart failure the following signs would be evident:
- Rapid breathing
- Liver enlargement
- Fast heart rate
- Heart murmur
- Abnormal heart sounds and
- Weak pulse at locations of wrist and groin regions
In addition to physical examination, other tests such as cardiac catheterization, echocardiogram, ECG and x-ray of the chest would be done. An echocardiogram reveals small underdeveloped left ventricle and aorta. This test is also used for tracking the blood flow and can also help detect other associated heart defects if present.
Treatment of hypoplastic left heart syndrome is usually done through a 3 step surgical procedure. Before the surgery, the condition is managed through medications that help dilate the blood vessels and keep the ductus arteriosus open. The baby may be required to put on ventilator if she experiences breathing problems. Following this, surgery is carried out in the following 3 steps:
- The Norwood operation involves reconstruction of the aorta and connecting it to the lower right chamber of the heart . After the operation is successfully completed, the chances of survival increase. Nasogastric feeding for infants may be required after this procedure to increase calorie breast milk or formula .
- A hemi–Fontan procedure is done between 4 to 12 months of age. This procedure reduces the work of the right ventricle making it to pump blood only to the aorta.
- The Fontan procedure is carried out between 18 months and 3 years of age. After this surgery, there is no mixing of oxygen rich and oxygen poor blood .
If hypoplastic left heart syndrome is not treated on time it can turn fatal. Surgery remains the primary mode of treatment and survival rates are as high as 75% after the first procedure. Prognosis gets better after success of every surgical procedure. The child’s recovery is also largely dependent on the size and functioning of the right ventricle.
When hypoplastic left heart syndrome is left untreated, it can pose the following complications:
The exact cause behind the development of hypoplastic left heart syndrome is unknown. Such a condition develops during fetal development where the structures of the left side of the heart does not properly form. Hypoplastic left heart syndrome is thought to run in families; this means that siblings of the affected child are at an increased risk of developing it.
According to the Centers for Disease Control and Prevention, each year about 960 babies in the US are diagnosed with hypoplastic left heart syndrome. This means that about 16 to 36 cases in every 10,000 babies in US are born with this condition .
Hypoplastic left heart syndrome represents 1.2 -1.6% of all congenital heart diseases in the United States . Before heart repair surgery was available this congenital anomaly claims 25% of all cardiac neonatal deaths in the country .
In condition of hypoplastic left heart syndrome, the heart is unable to supply blood to the rest of the body due to malformation of the left ventricle. In addition to this, the valves in the left side of the heart do not work properly . Also, the aorta is smaller than normal. All these sequence of events give rise to the condition of hypoplastic left heart syndrome.
During the first few days after birth, the heart pumps blood to lungs and rest of the body through a natural opening referred to as foramen ovale. This opening however closes after few days and then the heart is unable to pump blood giving rise to life threatening conditions.
Hypoplastic left heart syndrome is a congenital defect wherein the left side of the heart does not develop properly . The left portion of the heart consists of mitral valve, aortic valve, left ventricle, aorta and atrium. These structures either do not develop properly or are too small in size.
Hypoplastic left heart syndrome is a rare heart defect that takes place during fetal development. This condition is more common with males. It has been seen that babies born with hypoplastic left heart syndrome often seem to suffer from atrial septal defect as well.
Hypoplastic left heart syndrome is defined as the condition wherein the left portion of the heart fails to develop appropriately. It is a congenital condition that poses life threatening consequences for the new born baby.
The cause behind development of such a heart abnormality is yet to be known. In this condition, the left side of the heart that consists of the mitral valve, aorta, aortic valve and left ventricle do not develop normally. It has been estimated that about 10% of babies born with hypoplastic left heart syndrome are also known to suffer from other heart defects too.
The condition can be diagnosed through an ultrasound examination during the second trimester. After birth, the appearance of physical signs is an indication of hypoplastic left heart syndrome. In addition, echocardiogram, ECG, cardiac catheterization and x-ray of the chest confirms diagnosis.
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