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A newborn girl is evaluated in the nursery after an uncomplicated spontaneous vaginal delivery to a 29-year-old primigravida. The mother declined prenatal testing and ultrasound examination during the pregnancy. Her pregnancy was otherwise uneventful, and she took prenatal vitamins throughout. Examination of the neonate shows a posterior neck mass and bilateral nonpitting edema of the hands and feet. Femoral pulses are diminished. Neck ultrasound reveals a mass composed of cystic spaces separated by connective tissue. Which of the following is the most likely underlying mechanism responsible for this patient's condition?
Tachycardia
A condition characterized by an abnormally fast heart rate, typically over 100 beats per minute in adults.
Hypertension
A chronic medical condition in which the blood pressure in the arteries is persistently elevated.
Peripheral Vascular Disease
A vascular disorder in which blood vessels outside the heart and brain are constricted, frequently resulting in diminished blood circulation to the extremities.
Heart Failure
Heart failure is a chronic condition where the heart is unable to pump sufficiently to maintain blood flow to meet the body's needs.
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