Due to heart palpitations, in which my heart beat resting in 80's and will beat sometimes over 100's out of no where. I've had all kinds of tests such as EKG, stress test, echocardigram, and had to wear monitor for 30 days and nothing can be found why my heart beats fast. This has been going on for a year and I quit my job due to frequent attacks. My heart Dr changed bp meds from 5mg of amolodipine to 360mg Diltiazem but it appears not to be working. Help I need answers. I can't work because I'm having these attacks several times daily.