General Electric made a $500 portable electrocardiogram machine that runs on batteries and only requires a patient to press a green button to check for abnormal heart rhythms.
It was aimed at bringing the vital test to rural Indians who lacked access to hospitals with expensive machinery.
Since the company created the simple device, which can produce 500 scans costing 10 cents each on a single battery charge, it's sold in dozens of nations — including developed ones.
