A to Z Health Guide 2007

The scientific bulletin of the year may be the stem-cell breakthrough. But 2007 provided a whole alphabet of big medical news. TIME's A-to-Z guide reviews them

By Coco Masters, Alice Park, Carolyn Sayre, Tiffany Sharples, Alexandra Silver and Kate Stinchfield

Statins

statins health

GETTY

Cardiac doctors experienced their own heartbreak last year when a promising new compound that increases HDL, or good cholesterol, turned out to increase blood pressure and risk of death from heart disease. They had hoped that torcetrapib, made by Pfizer, could be combined with cholesterol-lowering statins to help cut the amount of fatty plaque in arteries by exploiting HDL's ability to vacuum up bad cholesterol. That may still happen, since a new study showed torcetrapib indeed raised HDL levels 60% and slowed the buildup of plaque in the arteries. Now the race is on to figure out how to accomplish this without boosting blood pressure to dangerously high levels.

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