Heart patients should avoid cold air as it is not good for them. This should specially be done when they undertake any form of physical exercise, as during this the body wants more oxygen and they cannot supply it.
Lawrence I. Sinoway, professor of medicine and director of the Heart and Vascular Institute, Penn State College of Medicine, said, "This study can help us understand why cold air is such a trigger for coronary events."
Uneven oxygen can be seen throughout the heart when cold air is taken in during physical work out. But in the case of a healthy body, this demand is met and the problem does not exist as the blood flow gets redistributed and the heart is able to carry out its normal function.
But it may not be true for people with heart problems, such as coronary artery disease, this may not be the case, said Sinoway.
Sinoway added, "If you are doing some type of isometric work and you`re breathing cold air, your heart is doing more work -- it`s consuming more oxygen."
Activities like carrying a laptop bag, a briefcase or shoveling are isometric work and in dipped temperatures heart has to work harder and this is the reason why more number of people die in winter due to cardiac arrest.