Two years ago I had a heart attack and last year a quadruple by pass. I started to suffer from palpitations about six months after the op and it was thought I would have to get a pace maker but my cardioligist then put me on a low dose of beta blocker as I am on .The irishhealth Heart Disease Clinic offers comprehensive information and advice on all conditions to do with your heart – including heart attacks, heart failure, angina, atherosclerosis, high blood pressure, high cholesterol and stroke.