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Marathons could permanently damage heart: Study
Wednesday December 07, 2011 09:32:32 PM,
IANS
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London: Running
marathons could permanently damage your heart, say scientists.
High-endurance activities can lead to scarring of the right
ventricle, increasing the risk of health complications, a study
has found.
Researchers hope the discovery will prompt the development of
suitable treatments and preventative measures, Daily Mail reported
Wednesday.
They are urging elite athletes to adopt sensible training
techniques and allow adequate recovery time after events.
Lead researcher Andre La Gerche, from the University of Melbourne,
Australia, said: "Our study identifies the right ventricle as
being most susceptible to exercise-induced injury and suggests
that the right ventricle should be a focus of attention as we try
to determine the clinical significance of these results."
"Affected athletes may be at risk of reduced performance - a
cardiac 'over-training' syndrome - or it may cause arrhythmia
(erratic heart beats)," the Mail quoted him as saying.
Scientists assessed 40 elite athletes with no history of heart
problems who were planning to compete in one of four endurance
events.
Test results showed that immediately after racing the athletes'
hearts had changed shape, growing in volume, while right ventricle
function decreased.
After a week right ventricle function recovered in most, but in
five there was evidence of potentially permanent scarring.
The right ventricle is one of the heart's four chambers and pumps
blood to the lungs. Scar tissue can weaken over time and can form
an abnormal bulge of tissue known as an aneurysm.
In conjunction with other heart problems this mass can cause the
heart to enlarge, reducing its ability to pump blood effectively,
resulting in heart failure, the Mail added.
Professor Sanjay Sharma, of St George's University London and
medical director of the London Marathon, called for more research
looking at larger groups of endurance athletes.
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