Postoperative cardiovascular complications of the 2 groups were compared with Chi-square test.
分析这两组患者的术后心血管并发症，然后进行卡方检验。
Postoperative cardiovascular complications were seen in 12 cases (3 hypotension, 9 arrhythmia), bronchopleural fistula and stress related gastric ulcer was seen in 4 and 2 cases, respectively.
术后心血管系并发症12例(循环不稳定3例、心律不齐9例)，支气管胸膜瘘4例，应激性溃疡2例。
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