This is the online version of AHA in 30 Seconds, t he latest from the American Heart Association’s scientific sessions.

Hello from New Orleans. Coming from Boston, running on the River Walk this morning felt balmy, not as shockingly hot and humid as it did Friday. I could get used to this, I thought. Then I saw the holiday decorations and remembered it’s November.

To the news: Today we have what my editor calls “two talker studies” about everyday items, coffee and sunshine.

Coffee and atrial fibrillation, reconsidered

I feel pretty secure saying my morning cuppa joe gives me a jolt as it wakes me up. But what does caffeine mean for people whose hearts beat with abnormal rhythms? A study called the DECAF (Does Eliminating Coffee Avoid Fibrillation?) trial (hah) presented here today an

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