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The Nation

Preliminary tests show that a new drug can begin dissolving blood clots that cause heart attacks immediately after injection and is nearly twice as effective as medication now used, according to a study. The genetically engineered drug, called tissue-type plasminogen activator, dissolved most of the offending clots in 66% of the 120 patients tested, when injected into bloodstreams within a few hours of their heart attacks, the New England Journal of Medicine reported.


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