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More bad news on second-hand smoke
Even 30 minutes of exposure is enough to damage your blood vessels.....Washington
A MERE 30 minutes of exposure to second-hand smoke is enough to injure blood vessels even in healthy teetotallers. Compounding the damage, the exposure slows the body's repair mechanisms, possibly for the next 24 hours, according to a new study by the University of California, San Francisco.
Researchers concluded that results showed even brief exposure to second-hand smoke has strong and persistent consequences on the body's vascular system, reported ScienceDaily. Ten young adult participants were exposed to carefully controlled levels of second-hand smoke for the study - the equivalent of being in a bar where smoking is allowed. As a control, the same people were exposed to clean air on a different day. In both settings, researchers evaluated the blood vessel health through ultrasounds, measured blood flow and analysed blood samples. The study is the first to link injury to blood vessels with the decreased effectiveness of the body's repair mechanism. Even brief second-hand smoke expo sure interfered with the body's ability to repair itself, said Yerem Yeghiazarians of Translational Cardiac Stem Cell Programme, University of California. Mumbai cardiologists agreed that passive smoking injures blood vessels, but pointed out that it is reversible initially. "Blood vessels immediately constrict when exposed to secondhand smoke but dilate again when you return to fresh air. It is when the exposure continues over a period of time that there is a spasm," said Dr C.V Van- . jani, head of non-invasive cardiology at P.D. Hinduja Hospital. Dr Vanjani added that 25 per cent of the side effects found in smokers are found in passive smokers too. 20% The drop in hospital admissions for heart attacks when US cities and states pass laws mandating smoke-free workplaces, restaurants, bars. DANGER SIGNS 1 Thirty minutes of exposure to secondhand smoke is enough to injure blood vessels even in healthy teetotallers. 2 The exposure, even if for a brief period, interfered with the body's ability to repair itself. 3 Passive smoking is as harmful as smoking in the long run. 4 Exposure to nicotine damages blood vessels, causes irregularity of heartbeat, increases blood pressure and leads to heart attacks at a young age. URL: http://epaper.hindustantimes.com/artMailDisp.aspx?article=07_05_2008_003_011&typ=0&pub=264
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