Smoking is even worse for heart than people might
already think, new Danish research warns. "It is
well known that smoking causes blocked arteries,
leading to coronary heart disease and stroke," said
researcher. "Our study shows that smoking also leads
to thicker, weaker hearts," she said. "It means that
smokers have a smaller volume of blood in the left
heart chamber and less power to pump it out to the
rest of the body. The more people smoke, the worse
him/her heart function becomes." What's the good
news? "The heart can recuperate to some degree with
smoking cessation, so it is never too late to quit,"
she added. For the study, the researchers collected
data on nearly 4,000 men and women who took part in
the 5th Copenhagen City Heart Study. The
participants were between the ages of 20 and 99 and
none had heart disease. Participants reported their
smoking habits and also had an ultrasound of their
hearts, to see how well they functioned. After
taking into account age, sex, weight, high blood
pressure, high cholesterol, diabetes and lung
function, the investigators found that smokers had
thicker, weaker and heavier hearts. The more
cigarettes people smoked, the more the pumping
ability of their heart suffered. The findings were
presented at the annual meeting of the European
Society of Cardiology, in Barcelona. Findings
presented at medical meetings are considered
preliminary until published in a peer-reviewed
journal. "We found that current smoking and
accumulated pack-years were associated with
worsening of the structure and function of the left
heart chamber -- the most important part of the
heart. Furthermore, we found that over a 10-year
period, those who continued smoking developed
thicker, heavier and weaker hearts that were less
able to pump blood, compared to never smokers and
those who quit during that time," she said in a
meeting news release. "Our study indicates that
smoking not only damages the blood vessels, but also
directly harms the heart," she added. "The good news
is that some of the damage is reversible by giving
up [smoking]." |