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Tall? That may be good news for
your heart, study finds
Tall men are less likely
than shorter ones to develop heart failure, suggests a new study of U.S.
doctors.
The finding doesn't prove that a few extra inches protect the heart, and
it's possible that tall and short people are different in other ways --
including in their diets or diseases growing up -- that could affect heart
risks.
Still, researchers said it's also possible that something about the
biology of taller people -- such as the distance between their hearts and
certain branches of arteries and blood vessels -- could possibly decrease
stress on the heart.
"From a day-to-day practical consideration, it's not something we take
into a big consideration when we're thinking about risk," said Dr. Jeffrey
Teuteberg, a cardiologist at the University of Pittsburgh Medical Center
who was not involved in the new study.
"The message certainly shouldn't be: 'If you're tall, don't worry about
these sorts of things, or if you're short, you're doomed,'" he told
Reuters Health.
But the study does show that there's more to heart disease risk than the
commonly-accepted culprits, he added, such as obesity, high blood pressure
and diabetes.
Data came from 22,000 male doctors who were followed as part of a large
study of heart disease and cancer, starting when they were in their
mid-50s, on average.
After responding to an initial questionnaire that asked about their
height, weight and health condition, men filled out follow-up surveys
where they reported new medical diagnoses each year.
The current report includes information from an average of 22 years of
that follow-up, during which 1,444 men, or about seven percent, developed
heart failure -- when the heart isn't strong enough to pump blood to the
rest of the body, or when it doesn't relax well after each beat.
Dr. Luc Djousse of Brigham and Women's Hospital and Harvard Medical School
in Boston and his colleagues found that the taller men were, the lower
their chance of heart failure.
The tallest men in the study -- those over six feet -- were 24 percent
less likely to report a heart failure diagnosis during the study period
than men who were five feet, eight inches and shorter.
That was after men's age and weight, as well as whether or not they had
high blood pressure or diabetes, had been taken into account, the
researchers reported in the American Journal of Cardiology.
Even with those considerations, the study can't prove that something else
wasn't behind the relationship between height and heart failure risk,
according to Teuteberg.
One possibility is how rich or poor the study participants were growing
up, and what their nutrition was like during key development periods.
"Despite its strong genetic determination, height is very sensitive to the
influence of socio-economic influences on growth," Dr. Claudia Langenberg,
from University College London, told Reuters Health in an email.
Even though this group of doctors likely ended up in similar income
brackets, differences early in life could still be to blame for extra
heart risks, said Langenberg, who has studied the effects of height and
socio-economic status on heart disease but wasn't involved in the new
report.
Djousse also proposed that childhood infections could both stunt growth
and ultimately lead to plaque build-up in the arteries and high blood
pressure, which are tied to heart failure.
Still, it's possible that height, itself, does belong on the list of heart
risks.
A taller frame might mean that when blood is directed back to the heart at
certain points in artery and blood vessel branches, it takes longer to get
there or hits the heart during a less-stressful part of its rhythm,
Teuteberg said.
He said that what's really behind the link is the subject for future
research.
"As much as we know about the development of very common diseases like
heart failure, there's still a lot we don't know. All of the traditional
risk factors we think of -- there's still a lot more that impacts the
development of those diseases beyond those things," Teuteberg said.
"This (finding) may lead to something much more interesting down the
line."
Researchers agreed that at the very least, the findings shouldn't concern
-- or relieve -- anyone based on their height. |