Shone complex is a rare congenital heart defect that is characterized by a combination of four heart defects: an atrial septal defect, a ventricular septal defect, a patent ductus arteriosus, and an overriding aorta. It is named after the British cardiologist, Sir Norman Shone, who first described the condition in 1954.

The symptoms of Shone complex vary depending on the severity of the condition, but may include:

-Heart murmur
-Abnormal heart rhythms
-Enlarged heart
-Shortness of breath
-Fatigue
-Poor growth
-Delayed development
-Kidney problems
-Abnormal blood clotting
-Abnormal blood pressure
-Abnormal liver function tests
-Abnormal blood sugar levels
-Abnormal cholesterol levels
-Abnormal eye movements
-Abnormal facial features
-Abnormal bone development
-Abnormal joint development
-Abnormal muscle development
-Abnormal skin pigmentation

The exact cause of Shone complex is unknown. However, it is believed to be caused by a combination of genetic and environmental factors. Possible causes include abnormal heart development in the womb, abnormal heart valve development, and abnormal heart muscle development. Other possible causes include infections, certain medications, and certain genetic conditions.

The treatment for Shone complex is primarily supportive and may include antibiotics, diuretics, and surgery. Antibiotics are used to treat any underlying infections, while diuretics are used to reduce fluid buildup in the heart and lungs. Surgery may be necessary to repair any structural defects in the heart or to remove any abnormal tissue. In some cases, a pacemaker may be needed to help regulate the heart rate.

The risk factors for Shone complex include:

1. Premature birth
2. Low birth weight
3. Congenital heart defects
4. Genetic predisposition
5. Abnormalities in the left ventricle of the heart
6. Abnormalities in the aortic valve
7. Abnormalities in the mitral valve
8. Abnormalities in the tricuspid valve
9. Abnormalities in the pulmonary valve
10. Abnormalities in the septal wall of the heart
11. Abnormalities in the coronary arteries
12. Abnormalities in the aorta
13. Abnormalities in the pulmonary arteries
14. Abnormalities in the great vessels
15. Abnormalities in the atria
16. Abnormalities in the ventricles

There is no known cure for Shone complex. Treatment focuses on managing the symptoms and complications of the condition. Medications may be prescribed to help manage symptoms such as pain, swelling, and infection. Surgery may be recommended to correct any structural abnormalities. Physical therapy and occupational therapy may also be recommended to help improve mobility and function.