Definitive diagnosis of pulmonary arterial hypertension is made by

Definitive diagnosis of pulmonary arterial hypertension is made by

A 3.5-kg full-term infant is born after an uncomplicated delivery with Apgar scores of 9and 9 at 1 and 5 minutes. The infant cries vigorously after birth but then goes into a quiet state. Within 10 minutes, the infant experiences cyanosis and respiratory arrest. During resuscitation, the nurse is unable to pass a nasogastric tube. The most likely diagnosis is

An 18-year-old female presents with an acute onset of chest pain, tachypnea, and cyanosis 1 week after the birth of her first child. Her chest radiograph is nondiagnostic, but her Pao, is 60 mm Hg on 40% oxygen. The most likely diagnosis is

The appropriate treatment of the 3-year-old in Question 11 is

The most common cause of a nasal polyp in children is