and his heart clenched painfully."I'm not sure whose blood it is yet, we need to run a test," Ou Yan explained. "I sprayed some fluorescent spray on the soil and dust on top of the stain and I'll have... He suspected it was a heart attack and recommended we be hospitalized for treatment."During hospitalization, a CT scan revealed a band-like shadow in the patient's pericardium. However, the medical t...