Thanks for replies, GP did me another one today to reassure me and was normal. He went through the 6 I had had and one was abnormal at a&e saying left ventricular hypertrophy but had. Even signed off as normal after chest X-ray. He explained that Ecg's can be mega sensitive and if I had LVH it would have shown in subsequent ecg's as it doesn't just vanish! Hopefully I can move on now!