Before revision:  Manifold learning in ST-elevation ECG waveform analysis helps quantify the evolving direction of  ST-elevation myocardial episode in a 1-hour period  .
After revision:  Manifold learning in ST-elevation ECG waveform analysis helps quantify the evolving direction of ST-elevation myocardial episode in a 1-hour period (accuracy=97.58\%, macro-F1=96.06\%) .