A 3-hour-old male neonate is observed to have profuse drooling and coughing in the nursery. The patient was born at 39-weeks gestational age to a 27-year-old, gravida 2 para 2, mother via
vaginal delivery. The pregnancy was complicated by
polyhydramnios. Cardiac exam reveals a harsh holosystolic
murmur most prominent at the left lower
sternal border. The
nurse attempts to pass a
nasogastric tube into the patient’s stomach but encounters resistance after advancing 12 cm. Which of the following physical exam findings will most likely also be present in this patient?