Martin is a 41 y/o male who comes to the clinic with the following symptoms: fever, chills, and malaise. On physical exam, the NP notes that he has a new murmur that was not present at his last visit and is aware that he has a prosthetic valve. He also has splinter hemorrhages on his nails, and petechiae on his palate. Additional diagnostic criteria for Martin's presumed diagnosis would include which of the following? i. Blood cultures
ii. Echocardiography
iii. Transesophageal echocardiography
iv. All of the above
v. A & B only