A 26-year old male comes to the emergency room complaining of syncope. He passed out while exercising in the gym. His father died of sudden cardiac death in his early 40s. Physical examination is significant for paradoxical splitting of second heart sound, S4 gallop, sustained apical impulse and a systolic ejection murmur at left lower sternal border. The murmur increased with the Valsalva maneuver. What is the next step in the management of this patient?
