(CNN) - It's well documented that things like smoking, poor diet and lack of physical activity are bad for heart health.
But, according to doctors at the University of Michigan, there are other factors that can cause cardiovascular problems.
Pollution is one example. Inhaling particles of dust can cause lung inflammation that can lead to problems with your hear and blood vessels.
Another is a lack of sleep, which can increase the risk for high blood pressure. Doctors say adequate sleep is beneficial for a healthy heart.
Lastly, even the weather can make a difference.
Bone-chilling temperatures cause arteries to contract, which can raise blood pressure and pulse rates. Individuals already suffering from hypertension, heart disease or diabetes could be at particular risk from cold temperatures that could trigger a heart attack.
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