Word: overexerts
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Dates: during 1960-1969
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Even while the heart is being asked to overexert, carbon monoxide from cigarette smoke combines with red blood cells and decreases their capacity to carry oxygen. As a result, the hard-working heart muscle is given less fuel to do its job. At the same time, tobacco's nicotine causes a constriction of small arteries in the extremities and speeds up the heart, increasing its need for oxygen and complicating the coronary problem...