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a study presented Saturday by Stanford researchers showed the apple watch is able to spot irregularities in the device users heart beat the irregularity is linked to a condition called atrial fibrillation which is often undiagnosed since it doesn't always cause outward symptoms and according to the centers for disease control and prevention the condition contributes to one hundred thirty thousand US deaths a year the apple sponsored study involved more than four hundred thousand participants and of those people about point five percent or two thousand patients receive notification of an irregular heart beat that relatively low number showed the watch didn't panic flocks of people with false alerts but for those who were warned and got testing done about a third of them did indeed have atrial fibrillation one of the leaders of the study noted that the condition can't coming go so that doesn't necessarily mean the rest of the people didn't have the condition the study underscores the potential future role wearable technology can have in healthcare earlier this year apple CEO Tim cook emphasize this saying he thinks apple's greatest contribution to mankind will revolve around health , a cardiologists not related to the study called the results a first step in understanding how new technologies can help spot life threatening situations before they strike