If you ask for a 24 hour EKG test, the doctor will see if your heart rate
drops during the night. If it does, maybe you are just constantly stressed? A heart rate
of 130 while taking 160 mg of propranolol is fairly high, but with normal echo, normal blood pressure (not low), and normal sinus rhythm/tachycardia, cardiac causes for your rapid heart rate is more or less ruled out, and maybe you should visit a GP or internist for further testing?