Snow shoveling during or after a blizzard may be the “perfect storm” for a cardiac event.
may be the “perfect storm” for a cardiac event in those with known or “occult” coronary disease.
When you are healthy, your body has the ability to increase oxygen supply as the demand increases. As the heart beats faster and harder, the coronary vessels open up and supply the additional blood flow that is required to feed the heart’s increased demand.flow, leading to slowed and inadequate oxygen supply. When the heart muscle does not get sufficient oxygen, it can rapidly fail because it is highly dependent on blood flow to generate normal contractions.
Ironically, the metabolic cost of snow shoveling may not be more than typical sub-maximal exercise like a light jog, but the oxygen cost to the heart is likely to be very high. Failing to warm up may add further demands on the heart. The blood vessels going to the working skeletal muscles may not open up as quickly, so it takes more effort for the heart to pump blood.
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