Final answer:
Tetralogy of Fallot is a congenital heart condition that is present at birth and can manifest through hypocalcemic tetany, unusual facies, and congenital heart defects. It involves four components and requires surgical repair for treatment.
Step-by-step explanation:
The syndrome that is present at birth with initial manifestations that can include hypocalcemic tetany, unusual facies, and congenital heart defects is Tetralogy of Fallot. Tetralogy of Fallot is a congenital heart condition that involves four components, including pulmonary infundibular stenosis, overriding aorta, ventricular septal defect, and right ventricular hypertrophy.
Individuals with Tetralogy of Fallot may experience symptoms such as a distinct heart murmur, low blood oxygen saturation, dyspnea, and difficulty in feeding or failure to grow and develop. The condition can be diagnosed through echocardiography imaging.
Tetralogy of Fallot occurs in approximately 400 out of one million live births and requires extensive surgical repair for treatment.