My husband is 35 went to cardiologist for routine check as he suffered from attack 2 year before as one year before is Tmt was negative even 2d echo was clear with lvef 55 Today after one year as he visit to Dr. Dr said him to do ECG. After ECG done. Dr. wrote ECG WNL QTC 418 AFTER ASKING HIM HE SAID NOT WORRY ANYTHING. CALLED HIM AFTER 4 MONTH AGAIN HE WROTE TWO TABLET NAME JUPRIOS GOLD10 & MET XL 25. I M LITTLE WORRY ABT WHAT WNL QTC 418 MEANS IS IT REALLY NORMAL OR THING IS TO WORRY please I REQUEST U please EXPLAIN ME WHAT IT MEANS IF NOT GOOD WHAT I CAN DO TO IMPROVE IT.