病人血常規(guī)WBC10.0×109/L,ECG示ST段V1~V4弓背向上抬高,CTNI>0.1ng/ml,D-二聚體<0.3ng/L,胸片未見明顯異常,為明確診斷應(yīng)進(jìn)一步做哪些檢查()