Congenital heart disease (CHD)
refers to a defect in the structure and function of the heart and great vessels which is present at birth. They account for more deaths in the 1st year of life than any other birth defects. Some require urgent surgical correction, whilst others require careful follow-up, resolving spontaneously over time.The embryonic development of the heart and great vessels is a very complex sequence of events. Any disruption in any part of this complex sequence can potentially result in a congenital heart defect.
Some CHDs may occur in isolation, whilst others may occur as part of various genetic syndromes, such as Down's syndrome, Marfan syndrome, Turner syndrome and DiGeorge syndrome.
Types of Congenital Heart Disease:
CHD is often classified as being either cyanotic (where there is a blue discolouration due to a lack of oxygen in the blood) or non-cyanotic.
Cyanotic CHD:
• Tetralogy of Fallot
• Truncus arteriosus
• Transposition of the great vessels
• Tricuspid atresia
• Truncus arteriosus
• Hypoplastic left heart
• Pulmonary atresia
• Ebstein's anomaly
• Truncus arteriosus
• Transposition of the great vessels
• Tricuspid atresia
• Truncus arteriosus
• Hypoplastic left heart
• Pulmonary atresia
• Ebstein's anomaly
Non-Cyanotic CHD:
• Ventricular septal defect (VSD)
• Atrial septal defect (ASD)
• Patent ductus arteriosus (PDA)
• Coarctation of the aorta
• Aortic stenosis
• Pulmonic stenosis
• Hypoplastic left heart
• Dextrocardia
• Atrial septal defect (ASD)
• Patent ductus arteriosus (PDA)
• Coarctation of the aorta
• Aortic stenosis
• Pulmonic stenosis
• Hypoplastic left heart
• Dextrocardia
Symptoms of Congenital Heart Disease:
The types and severity of symptoms depend largely on the type of defect present. Some conditions may present with symptoms at birth e.g. "blue baby", difficulty breathing, weak cry, failure to thrive etc., whilst others may cause symptoms only in later life e.g. coarctation of the aorta. Others still, may not develop any symptoms and have normal physical activity and normal life span.
Treatment of Congenital Heart Disease:
This once again depends on the type and severity of the defect. Some CHDs improve spontaneously without the need for any treatment. Others are so small that no treatment may be required. The more serious defects, however, will generally require medication or surgical correction.
Dr Ang C.D. has been in medical practice for over 12 years. He graduated with an M.B.B.S. degree from the National University of Singapore in 1997 and subsequently completed his post-graduate diploma in Family Medicine.
He has had training in Emergency Medicine, Internal Medicine, Geriatric Medicine, Orthopaedic Surgery, Obstetrics & Gynaecology, Neurosurgery, General Surgery, Colorectal Surgery and Urology.
Dr Ang currently practices in a family clinic in Singapore, seeing a good mix of paediatric, adult and geriatric patients.
With the goal of providing local and international patients with a resource for specialist care in Singapore, Dr Ang has founded SingaporeDoc.com, a Web Directory of Specialists in Private Practice in Singapore.
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