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OUT OF THE BOX: Your Ticker: 'Don't Bicker!'

Squabbling with one's spouse? Not heart smart, according to a Canadian study that found a link between unhappy marriages and unhealthy tickers.

Having a big heart may sound romantic, but literally speaking, it's not. High blood pressure can thicken the wall of the left

ventricle—the heart's largest blood-pumping chamber—and keep it from contracting effectively. This can lead to heart failure.

As reported in a Yahoo! news story, the University of Toronto study tested individuals with mildly elevated blood pressure over a three-year period. To determine the level of wedded bliss, test subjects filled out questionnaires about the quality of their lives. Through echocardiograms, researchers found that those with happy marriages had experienced an 8% reduction in heart thickness over three years, while those trapped in miserable mergers had a 6% increase in left ventricular mass.

Additionally, absence seems to make the heart grow fonder, or something like that: Readings were taken several times over a 24-hour period, and when unhappily married subjects' spouses were present, their blood pressure spiked.

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