Hello, I have having irregular heart beat rate since september, I have visited cardiologist and after ecg it was diagnosed as inappropriate sinus tachycardia. I have also a bit high cholesterol. So, doctor given a bp medication and creator. And inderal 20 mg to reduce heart beat rate. I see no improvement, done echo as well everything is normal. I get some pain whenever heart beat rate is around 100, a bit uneasy. What should I do? I also had full body check up, everything is normal as well.