A 3-month old male infant was admitted in emergency department having episodes of excessive crying followed by limpness, cyanosis and fainting. The patient was born at 40 weeks of gestation by C-section because of failure to progress to a 23 year old mother G1P0. Initial inspection showed Apgar scores of 7 and 8 at 1 and 5 minutes, respectively. He had a two vessel cord and acrocyanosis.
His cyanosis increased with crying and he had a grade 3/6 ejection systolic murmur along the upper left sternal border (ULSB). His oxygen saturations were 95% and stable. What is the possible diagnosis and what should be the further treatment?
