Are you fed up with your current ECG sensor? Tired of all the mess of electroconductive gels, sticky electrodes and tangled wires? How about this: Britain's Plessey Semiconductors offers an ECG sensor that promises heart-monitoring without the hassle. We've seen similar technology before, but according to the company, the Electric Potential Integrated Circuit -- or EPIC, as it's humbly called -- can read heartbeats even through a sweater; future versions might be embedded in hospital gurneys for constant, unobtrusive monitoring. Like an extremely sensitive voltmeter, it detects tiny changes in electric fiel
