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What if we develop cheap cardiac diagnostic tools?

I know people who were misdiagnosed for a long time, some of them under 9, and that was because of doctors weren't lucky to detect it using the stethoscope. I believe that if we could develop a small, $10 or less price tag, electronic stethoscope that with a coded set of leds or a small screen would let anyone detect if he or she is ok, or having an arrhythmia, or a paralyzed valve we would save millions of lifes around the globe and even have good profitability. What do you think?

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    Apr 20 2012: That will be very good if it delivers as this idea promised.......
    Just go for it & do it....