Cloutier Justin M, Liu Shuangbo, Hiebert Brett, Tam James W, Seifer Colette M
University of Manitoba, Section of Cardiology, Winnipeg, Manitoba, Canada.
Cardiac Sciences Program, Winnipeg Regional Health Authority, Winnipeg, Manitoba, Canada.
Am J Cardiol. 2017 Sep 15;120(6):1002-1007. doi: 10.1016/j.amjcard.2017.06.031. Epub 2017 Jun 28.
Cold weather to 0°C has been implicated as a risk factor for ventricular arrhythmias and implantable cardioverter defibrillator (ICD) shocks. The effect of more extreme cold weather on the risk of ventricular arrhythmias and ICD shocks is unknown. We sought to describe the relationship between extreme cold weather and the risk of ICD shocks. We retrospectively identified patients seen at the Pacemaker and Defibrillator Clinic at St. Boniface Hospital in Winnipeg, Manitoba, Canada between 2010 and 2015 with an ICD shock. We excluded multiple shocks occurring on the same day in a single patient. We collected weather data, and evaluated the relationship between ICD shocks and weather on the same day as the shock using Negative Binomial regression. Three hundred and sixty patients experienced a total of 1,355 shocks. When excluding multiple shocks occurring in a single patient on the same day, there were 756 unique shocks. The daily high (DH) was the strongest predictor of receiving an ICD shock. Compared with the warmest days (DH above 10°C), shocks were 25% more common on the coldest days (DH below -10°C), and 8% more common on cold days (DH between -10°C and 10°C). This linear trend was statistically significant, with a p-value of 0.04. In conclusion, we found an association between extreme cold weather and ICD shocks.
寒冷天气降至0°C被认为是室性心律失常和植入式心脏复律除颤器（ICD）电击的一个风险因素。更极端的寒冷天气对室性心律失常风险和ICD电击的影响尚不清楚。我们试图描述极端寒冷天气与ICD电击风险之间的关系。我们回顾性地确定了2010年至2015年期间在加拿大曼尼托巴省温尼伯市圣博尼费斯医院起搏器和除颤器诊所接受ICD电击的患者。我们排除了同一患者在同一天发生的多次电击。我们收集了天气数据，并使用负二项回归评估了电击当天ICD电击与天气之间的关系。360名患者共经历了1355次电击。排除同一患者在同一天发生的多次电击后，有756次独特的电击。日最高气温（DH）是接受ICD电击的最强预测因素。与最温暖的日子（DH高于10°C）相比，在最冷的日子（DH低于-10°C）电击更为常见，多出25%，在寒冷的日子（DH在-10°C至10°C之间）电击多出8%。这种线性趋势具有统计学意义，p值为0.04。总之，我们发现极端寒冷天气与ICD电击之间存在关联。
