av since had an operation to get rid of my vt which has worked well but now a have these missed beats daily and they r making me feel lightheaded when it comes on me am abit worried although the consultants says its nothing to worry about am not confinced cause it took them a year before the listened before when a tld them ma heart was racing and they kept telling me a was ok until the put me on the treadmill and found out it was vt i had so u can understand why am worried cld u help please