July 27th, 2020
A healthy 9-month-old boy is brought to the physician for a well-child examination. He has no history of serious illness. He has been feeding and growing well. Pulse oximetry on room air shows an oxygen saturation of 98%. He is pink in color. The lungs are clear to auscultation. A grade 3/6 systolic ejection murmur is heard along the left middle and upper sternal border. S2 is widely split and does not vary with respiration. Pulses are strong in all extremities. X-rays of the chest are normal. Which of the following is the most appropriate next step in management?