After heart attack, patient's pet may help heart

NEW YORK - Chalk up one more potential attribute of the family pooch -- a new study suggests that after a heart attack, pet owners have healthier hearts than heart attack patients who don't have a dog, cat or other pet.

According to a report in The American Journal of Cardiology, Dr. Erika Friedmann and colleagues compared heart rate variability among a group of 102 patients who had a heart attack in the past two years, including 35 patients who owned a pet.

Heart rate variability is a measure of the heart's ability to handle stress. A reduction in heart rate variability is linked to a higher risk of heart disease and death.

Friedmann, who is with Brooklyn College of the City University of New York, and her team found that certain heart rate variability measures were higher in pet owners -- particularly dog owners -- than non-owners.

While studies have found a lower heart rate variability in depressed people than in those without depression, this did not explain the findings.

More research is needed to see if the improved heart rate variability in pet owners is due to some psychological factor or exercise that patients might get from walking their pet, according to Dr. Richard Stein, a spokesman for American Heart Association.

The study offers a "cute observation," said Stein, "but it does not provide enough evidence to recommend that heart attack patients go out and get a dog."

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Revision date: 12 December 2007
Last revised by Amalia K. Gagarina, M.S., R.D.