MIGRAINE TREATMENT LIFTS SMALL COMPANY

NMT Medical is a little-known Boston-based medical-device company with a rocky past, mounting losses and, in its most recent quarter, just $6 million in revenue. So why are NMT's thinly traded shares up 185 percent since the beginning of the year? The excitement stems from evidence that many strokes and, more surprising, migraine headache attacks might be linked to a common but little-known heart defect, a flap in the wall separating the two upper chambers of the heart that can be pushed open when a person is under stress.
International Herald Tribune