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New sound synchronization technology holds the key to earlier diagnosis of heart disease
Date:6/2/2011

Innovative UK technology is contributing to the development of a revolutionary digital stethoscope that could make it easier for GPs to spot the first signs of heart disease.

With Engineering and Physical Sciences Research Council (EPSRC) funding, a Queen Mary, University of London (QMUL) team has developed a computer-based technology that synchronises the various sounds collected by the new stethoscope and which make up a human heartbeat.

The sounds can then be analysed by an existing technique called ICA (independent component analysis), with data presented on a laptop or desktop computer in easy-to-understand graphs. These provide a visual representation of the heartbeat and any anomalies in it. Currently, such anomalies can be missed by doctors who aren't experts in cardiac care.

ICA can only analyse heartbeats if all the different sounds that make up an individual's heartbeat are brought together as one overall sound.

Like a conventional stethoscope, the new stethoscope captures four sounds one after another. The computer-based technology developed by the QMUL team then turns these separate sounds into one combined signal which ICA can then process. The QMUL synchronisation technology therefore plays a vital bridging role between the new stethoscope and ICA.

With conventional stethoscopes, the identification of a potential heart problem is completely reliant on the expertise and listening skills of the GP.

QMUL's technology was unveiled on 25th May at the 36th International Conference on Acoustics, Speech and Signal Processing held in Prague in the Czech Republic.

The overall stethoscope development project is an international collaboration led by Portugal's University of Porto and Centro Hospitalar Alto Ave, Guimares.

"Heart disease is still the UK's number-one killer", says Professor Mark Plumbley, who has led the QMUL work. "Our work here is making a vital contribution to an invention that will help GPs ident
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Contact: EPSRC Press Office
pressoffice@epsrc.ac.uk
01-793-444-404
Engineering and Physical Sciences Research Council
Source:Eurekalert

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