"It might be a surprise, because coffee does give some people the jitters," Klatsky said. "And I don't think we're ready to tell people they should drink coffee to prevent heart rhythm problems."
The study didn't offer any reason why coffee might reduce heart rhythm problems, Klatsky said. "It could be that coffee drinkers have better diets or exercise more. We can't say for sure that it might not be related to minor heart rhythm problems that don't require hospitalization."
The bottom line: "Coffee drinkers don't have to quit because they have heart rhythm problems," Klatsky said. "That's about as far as we can go."