Smokers May Show Heart Disease Much Younger Than Nonsmokers

Mar 31, 2014

According to Reuters Health, a smoker's coronary artery disease is likely to be as advanced as that of a non-smoker who is 10 years older when both show up at the hospital with a heart attack.

A recent research study looked at nearly 14,000 patients hospitalized with blockages in arteries supplying the heart muscle and found smokers were more likely than nonsmokers to die within a year. Even if the smoker was younger and otherwise healthier, their heart arteries were in a condition similar to those of nonsmokers 10 years older.

"We saw smokers presenting the disease at age 55 and nonsmokers presenting the same disease at 65," said Dr. Alexandra Lansky, a researcher on the study.

Smoking can cause blood clots, which often get lodged in the rigid and narrow arteries that have already been clogged by the buildup of cholesterol and fat deposits. Fat buildup and stiffening of the artery walls (atherosclerosis), becomes more likely with age for everyone, but clots caused by smoking worsen the blockages. That makes smokers more likely to have a heart attack at a younger age.

Past research has identified a "smoker's paradox."  Because smokers are younger, with fewer other health problems, when they had a heart attack, they were more likely to recover it. Or so it seemed.

"We wanted to look at longer-term effects of smoking rather just the short term effect," Lansky said.

The researchers analyzed medical records for 13,819 patients, almost 4,000 of them smokers, hospitalized with chest pain or a heart attack caused by a blocked coronary artery. The study team organized the data to match the smokers and nonsmokers by age, weight, comorbidities and other risk factors. When compared to nonsmokers with similar overall health, the smokers were ten years younger, on average, and more likely to have already been treated with blood thinners - suggesting they had already experienced problems with blood flow.

Imaging of the coronary artery showed the smokers' had atherosclerosis comparable to the nonsmokers ten years older (as reported in the JACC: Cardiovascular Interventions).

Before the adjustments for age and other health conditions, the smokers and nonsmokers were about equally likely to survive the first 30 days after hospitalization, and smokers were about 20 percent less likely to die within a year. But once smokers and nonsmokers with similar health profiles were compared to each other, the smokers were 37 percent more likely to die within the first year.

The findings are not surprising, according to Dr. Robert Giugliano, a cardiologist at Brigham and Women's Hospital in Boston.

"Nonetheless, the public does need to know that there is now even more evidence that smoking is bad for your health, accelerates the process of atherosclerosis (so smokers have heart and vascular disease on average 10 years early than non-smokers), and leads to worse outcomes compared to non-smokers of a similar age," said Giugliano, who also teaches at Harvard Medical School. "There just aren't many healthy people in their 80's who smoke regularly . . . if you want to live a healthy, long life, smoking stacks the odds against you," Giugliano said.

Live Well Sioux Falls has resources to help you or someone you know quit tobacco.