Hi. I m male, 35 yrs, 184 cm tall, weighing 92 kg. I never had any heart-related symptoms until a year ago when i started feeling my PVC s (Don t know if they existed before, but nothing had been detected earlier). They were at a low frequency(Report said: Rare), detected by 24-hr holter. Did tests for TSH, and minerals which indicated low Vitamin D and phosphorus. 24-hr urine test showed no excess depletion of phosphorous. Took all those results to cardiologist and he said there s no cause for concern. The PVC s faded for a while and returned in late May. The cardiologist then asked for an echo stress test, which showed normal heart function. Again, the PVC s faded all by themselves. The doc put me on Concor COR 2.5 though because he said this would help maintain a healthier pulse in a stressful work environment. I ve been having PVC s lately again, for the last 3 weeks now. They ve become more frequent. Today for about 4 hours i was having 6-7 PVC s in a minute. After that, they almost faded (by noon, almost 2 hours after my Concor pill). My last doctor trip was only a week ago when he asked me for an echocardiogram. He said the result was normal based on verbal communication he received from the doctor who made the assessment. Looking at it, i can see a few things: 1- Filling Pressure E / A : 1.3 (normal = 1) 2- Mitral DTE : 199 ms (normal = 152 - 180) 3- It says Trivial tricuspid regurgitation, but normal morphology and leaflet motion Otherwise, all is normal. FYI Ejection Fraction = 60-64% Any cause for concern for the above? I went to my GP today, and asked him to give me a full-blown blood/urine analysis for anything that may be related and for my general medical health. Does the increase in PVC frequency merit some other action? at what point should i consider going to the emergency?? Note, I m sitting right now and feeling absolutely nothing. It seems like someone turned the switch off. The PVC s would most likely start again tomorrow morning when i wake up and last for a good 3-4 hours. Is this the time it takes for Concor to kick in? This has been happening the last 5 days. This wasn t the case before though.