I am a relatively new nurse, and I had a pt that developed chest pain during the night, we got a stat EKG and it was better than the previous one on admission. He has a hx of chest pain at home. I continued to check on him during the night and then I got a page that his HR was high. I went and checked on him and he was having a bowel movement. I got the patient back in bed and I walked out to the desk and i get a phone call from telemetry saying he had a 3 beat run of v-tach. I had another nurse come in and assess him with me and asked his opinion on if I should call the MD to get cardiac enzymes... He said with the hx not to call the MD. I relayed this information to the oncoming nurse and she acted like I was completely incompetent and like I just sat back and didn't care. His HR jumped up again that am after I had left, but it was soon after the pt had moved from the bed to the chair. I know I am supposed to ask and use the guidance of my colleagues, but I don't want to fail my patients. What is the best advice?