Effects of moderate strength cold air exposure on blood pressure and biochemical indicators among cardiovascular and cerebrovascular patients.

Analysis of Catecholamine Trend during the Cold Air Event As shown in Table 3 , when comparing catecholamine levels before, during, and after cold air exposure patient groups, DA levels had declines of 3.5% and 91.03% compared with before cold air exposure groups and showed a negative trend; the smallest change was in E levels, representing increases of 0.17% and 0.51%; and the increases in NE levels were 93.3% and 128.93%; both NE and E showed a positive growth trend.

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NE concentration in plasma showed a trend; in the patient group, the concentration was high during and after cold air exposure.

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