On the road again."Heavy traffic may trigger heart attacks" (SN: 11/13/04, p. 316) seems to confuse triggers with long-term contributing factors. Traffic might just cause small peaks in stress that trigger only heart attacks that would have otherwise happened days later. To recommend staying out of traffic, research would need to show that people regularly in traffic are more likely to have heart attacks or have them significantly earlier than people who don't spend time in traffic. PAUL RAMSEY, TUCSON, ARIZ ARIZ Arizona (old style) . Carbon monoxide carbon monoxide, chemical compound, CO, a colorless, odorless, tasteless, extremely poisonous gas that is less dense than air under ordinary conditions. It is very slightly soluble in water and burns in air with a characteristic blue flame, producing carbon dioxide; maybe the primary reason for heart attacks after being in traffic. As carbon monoxide replaces oxygen in the blood, it may push people with constricted con·strict v. con·strict·ed, con·strict·ing, con·stricts v.tr. 1. To make smaller or narrower by binding or squeezing. 2. To squeeze or compress. 3. blood flow to the heart into a heart attack. JIM Jim Miss Watson’s runaway slave; Huck’s traveling companion. [Am. Lit.: Huckleberry Finn] See : Escape BEREGI, PORT ORFORD, ORE. |
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