You need this stethoscope

http://techcrunch.com/2015/09/02/the-eko-core-is-a-digital-upgrade-for-the-centuries-old-stethoscope/

And for the 70 percent of pediatric patients with suspected heart murmurs who are unnecessarily referred to a cardiologist, Eko will be able to save thousands of dollars in avoidable echocardiograms.
https://ekodevices.com/whitepapers/Eko_for_Cardiology_Whitepaper.pdf

"diagnostic auscultation accuracy of cardiology fellows is low, at 22%"