Swampillai Janice, Wijesinghe Namal, Sebastian Cherian, Devlin Gerard P
Department of Cardiology, Waikato Hospital, New Zealand.
Cardiol Res. 2012 Oct;3(5):205-208. doi: 10.4021/cr223e. Epub 2012 Sep 20.
Increased numbers of ST Elevation Myocardial Infarction (STEMI) admissions have been observed during winter in many countries. Our aim was to assess if seasonal variation of STEMI was present in the Waikato region of New Zealand.
Case notes of patients admitted to Waikato hospital with STEMI between July 1998 and December 2007 were analysed. The incidence of STEMI during summer (December to February), autumn (March to May), winter (June to August) and spring (September to November) were calculated. The individuals were divided into 2 age groups of ≤ 70 and > 70 years of age.
A total of 3,569 patients (mean age 66.9 ± 14.1 years, 64% men) were included. STEMI presentation during winter was significantly higher compared with summer (35 ± 13 versus 27.3 ± 11.3 cases per month, P < 0.02) with 3 additional STEMI admissions per fortnight during winter months. The increase in STEMI in winter was more apparent in patients > 70 years of age, with an 8.5% increase in winter admissions compared to summer (P < 0.01). There was no significant difference in the incidence of STEMI between other seasons.
There is a higher incidence of STEMI during winter in the Waikato region compared with summer. This increased incidence is particularly pronounced in patients over 70 years of age. Further investigations are necessary to elicit potential causes.
许多国家在冬季观察到ST段抬高型心肌梗死（STEMI）入院人数增加。我们的目的是评估新西兰怀卡托地区是否存在STEMI的季节性变化。
分析了1998年7月至2007年12月期间因STEMI入住怀卡托医院的患者病历。计算了夏季（12月至2月）、秋季（3月至5月）、冬季（6月至8月）和春季（9月至11月）STEMI的发病率。将个体分为年龄≤70岁和>70岁两个年龄组。
共纳入3569例患者（平均年龄66.9±14.1岁，男性占64%）。与夏季相比，冬季STEMI的发病率显著更高（每月35±13例对27.3±11.3例，P<0.02），冬季每月额外有3例STEMI入院。冬季STEMI的增加在>70岁的患者中更为明显，与夏季相比，冬季入院人数增加了8.5%（P<0.01）。其他季节之间STEMI的发病率没有显著差异。
与夏季相比，怀卡托地区冬季STEMI的发病率更高。这种发病率的增加在70岁以上的患者中尤为明显。有必要进行进一步调查以找出潜在原因。
