8. You and your AEMT partner are dispatched to a 34-year-old male with chest pain. As you approach the patient you notice he is breathing fast and holding his chest. He is able to talk to you in complete sentences and does not appear to have a diminished LOC. He states he has been under a lot of emotional stress with work and just found out his girlfriend is pregnant. He also tells you he does not have a cardiac history and feels light headed. Your partner obtains a set of vital signs while you attach a cardiac monitor. Your partner relates that the patient is breathing at 27 breaths per minute, has a blood pressure of 98/62, and a rapid pulse. Once you have the monitor attached you observe sinus tach at 175 beats a minute with a narrow QRS. After attaching oxygen and having your partner start an IV, what would be the next appropriate intervention?