I had a routine blood test that showed some indication of possible heart issue. (Cant remember the name). I made an appointment with a cardiologist, met with him and have had a heart monitor for a week. Today I had a heart stress test which looked fine. I also had an echocardiogram, which Im waiting to hear those results. The heart monitor (Lifestar) goes off multiple times a day and when I download the heart recordings the peolple at Lifestar have reported elevated heart rate and premature heartbeats. The cardiologist today that read the stress test results told me the premature heartbeats are not of concern , which is great. However, my monitor went off as I was leaving the heart hospital. The girls that read my recordings at Lifestar told me my heartrate was betwenn 178 and 180 but said it should be OK. I could feel my heart racing. My sister and I went upstairs to the cardiologists office and a nurse in the office took my heart rate, called life star and had the recordings sent. It wasnt as high as the Lifestar person reported, but was still around 155-160. Im on no heart medication but am under a lot of recent stress. What causes such an elevated heart rate and what should I do to try and control it?