A 37 year-old-man who suffered from acute palpitation and intermittent atypical chest pain . As a medical history, he had noticed a similar episode of palpitation .He had any cardiovascular risk factor. On examination there was no fever. Heart rate was 122 initially and blood pressure was 130/80 mmHg. No signs of heart failure were present. The first electrocardiogram found an atrial fibrillation rhythm with presence of a doublet of premature ventricular complex, no repolarization abnormalities were noticed (Fig1) . A control electrocardiogram was done revealing a spontaneous return to sinusal rhythm with a clear ST segment elevation in the septo-apico-lateral and inferior derivations and a PQ segment depression in lateral derivations (Fig 2). the patient was out chest pain.Trans thoracic echography revealed a normal left ventricular function , the absence of valvular diseases, the absence of pericardial effusion and wall motion abnormalities,LA was normal . Lab tests notice essentially negative troponins and negative inflammation markers.