Final answer:
Coarctation of the aorta is a life-threatening anatomical anomaly characterized by the narrowing of the aorta, leading to restricted blood flow. Symptoms vary depending on the age of the individual, and treatment usually involves surgical intervention.
Step-by-step explanation:
A life-threatening anatomical anomaly is coarctation of the aorta. This is a congenital abnormal narrowing of the aorta that restricts blood flow through the primary systemic artery, which can be life-threatening. Symptoms include difficulty breathing, poor appetite, trouble feeding, or failure to thrive in infants, and dizziness, fainting, shortness of breath, chest pain, fatigue, headache, and nosebleeds in older individuals. Treatment involves surgery to remove the affected region or angioplasty to open the narrow passageway.