最近，加拿大学者完成了一个所谓的课题，即证实了“铲雪（Snow shoveling）增加心肌梗死的发病率或风险”。这是一个值得花费时间与精力和金钱去研究的项目？显然不是，我们的教科书早就明确“已经患有冠心病或冠状动脉狭窄的人，必须适量限制体力活动；或体力或情绪负荷可诱发心绞痛，甚至心肌梗死”。所以，类似铲雪对心肌梗死发病率之影响一类的研究根本就没有必要，还是让我们用有限的精力与金钱去探讨那些更需关注的问题吧！

Snow Shoveling Really Does Raise Heart Attack Risk: Study

Seven percent of heart patients at Canadian hospital said symptoms started while clearing snow

THURSDAY, Dec. 15 (HealthDay News) -- Snow shoveling does increase the risk of heart attack, a new study confirms.

While many people believe this, there has been little actual evidence, according to researchers at Queen's University in Kingston, Canada. So they decided to look for proof.

They reviewed the records of 500 patients who went to Kingston General Hospital with heart problems over two winter seasons. Of those patients, 35 (7 percent) started experiencing heart symptoms while shoveling snow.

"That is a huge number," Dr. Adrian Baranchuk, a professor in Queen's School of Medicine and a cardiologist at Kingston General Hospital, said in a university news release.

"Seven percent of anything in medicine is a significant proportion. Also, if we take into account that we may have missed some patients who did not mention that they were shoveling snow around the time that the episode occurred, that number could easily double," he explained.

The researchers also identified three main factors that put people at high risk for heart problems while shoveling snow: being male (31 patients); having a family history of premature coronary artery disease (20 patients); and smoking (16 patients).

They also found that regularly taking four or more cardiac medications could lower the risk.

The study was recently published online in the journal Clinical Research in Cardiology.

SOURCE: Queen's University, news release, Nov. 23, 2011