The aim of this observational study is twofold. The primary hypothesis being tested is that initial(first) high sensitivity Tn \<5ng/l (limit of detection) combined with an ECG with no ischaemic changes is superior as an accelerated diagnostic tool/strategy compared to TIMI score (\<2), GRACE \<75 and HEART score ≤ 3. (Hs tn T- Roche elecsys HS tn T) and also against HS troponin at the 99th percentile (\<15ng/l with nonischaemic changes)- again all scored with initial (first tn ) only. The second aim is to directly compare the three established methods of risk stratifying patients (predicting risk in suspected heart attacks) namely, the Global Registry of Acute Coronary Events (GRACE), Thrombolysis in Myocardial Infarction (TIMI) and HEART score in the era of high sensitivity troponins performs best.
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Number of Participants with major adverse cardiac events(MACE)- death, non-fatal myocardial infarction and emergency revascularisation at 1 year
Timeframe: 12 months observational period from recruitment date