Zhonghua wei zhong bing ji jiu yi xue 2019-May
[Predictive value of myoglobin and D-dimer on severe heat stroke: a clinical analysis of 38 patients with severe heat stroke].
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METHODS
Thirty-eight patients with severe heat stroke admitted to emergency department of Beijing Daxing District People's Hospital from July 30th to August 5th in 2018 were enrolled. There were 18 patients suffered from exertional heat stroke (EHS), and 12 patients suffered from classical heat stroke (CHS), and 8 patients with heat spasm and heat exhaustion were selected as control group. The gender, age, onset time, body temperature, heart rate (HR), lactic acid (Lac), platelet (PLT), alanine aminotransferase (ALT), alanine aminotransferase (AST), blood urea nitrogen (BUN), serum creatinine (SCr), serum sodium at admission of hospital, as well as positive rate of myoglobin (MYO) and D-dimer (the positive threshold of MYO and D-dimer was 107 μg/L and 600 μg/L respectively) were recorded and compared among the groups. Receiver operating characteristic (ROC) curve was plotted to analyze the prognostic value of MYO and D-dimer on heat stroke. The outcome of all patients was followed up, and the 28-day mortality between EHS and CHS patients was compared. The patient's body temperature was measured again after 4 hours of active cooling treatment (T4 h), and the relationship between T4 h and 28-day mortality was discussed.RESULTS
The majority of severe heat stroke patients were male, especially in EHS patients. EHS patients were younger than CHS ones, and had shorter onset time, with significant differences among the groups. The body temperature and HR at admission in the EHS group and the CHS group were significantly higher than those in the control group [body temperature (centigrade): 41.34±0.67, 40.39±0.58 vs. 37.80±1.39; HR (bpm): 139.78±15.63, 113.08±17.70 vs. 92.00±15.89, all P < 0.05], PLT was significantly lowered (×109/L: 164.94±73.80, 165.78±53.49 vs. 249.50±84.22, both P < 0.05), and the positive rates of MYO and D-dimer were also significantly increased [MYO positive rate: 100.0% (18/18), 100.0% (12/12) vs. 50.0% (4/8); D-dimer positive rate: 77.8% (14/18), 100.0% (12/12) vs. 12.5% (1/8), all P < 0.05]. ROC curve analysis showed that positive MYO and D-dimer at admission had certain diagnostic value for heat stroke, the area under ROC curve (AUC) was 0.750 and 0.871, the sensitivity was 50.0% and 87.5%, and the specificity was 100% and 86.7%, respectively. The 28-day mortality of the EHS group was significantly higher than that of the CHS group [44.4% (8/18) vs. 8.3% (1/12), P < 0.05]. Furthermore, the 28-day mortality of the patients with T4 h ≥ 38 centigrade in the EHS group was significantly higher than those with T4 h < 38 centigrade [70.0% (7/10) vs. 12.5% (1/8), P < 0.05].