Be merry and bright, but beware of your heart having a fright.

The holiday season means plenty of parties — and plenty of stress. Behind the cheer and chaos could lurk a dangerous heart issue waiting to strike.

Known as “holiday heart syndrome,” this condition is less than holly and jolly.

“Holiday heart syndrome refers to episodes of heart rhythm disturbances, commonly known as atrial fibrillation,” Siri Sirichanvimol, client executive of Food & Nutrition Services at Naples Comprehensive Health (NCH) , told The Post.

The culprit behind these irregular heartbeats is the hustle and bustle of the holiday season.

“It’s often triggered by behaviors that are common during the holiday season, such as binge drinking, higher salt intake and elevated stress,” Sirichanvimol said. “These facto

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