Alternatively, doctors can analyse the reading using software. The top graph shows the spectroscopic reading, with the colours representing the energy within the frequencies of the heartbeat.
On the top right-hand side of the screen — the anatomical picture of the heart — doctors can record which part of the heart they were listening to when recording the reading.
Google Chrome OS demonstration
Vice President of Product Marketing Sundar Pichai gives a virtual tour of Google's new operating system, Chrom… Watch it now
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| Apple iPhone 3GS 32GB | 35 plans |  16% |
| Apple iPhone 3GS 16GB | 35 plans | 3% |
| Blackberry Curve 8520 | 6 plans | 1% |
| Apple iPhone 8GB | 41 plans | 1% |
| Samsung Galaxy Icon | 6 plans | 1% |
| Apple mobile phones | 19% |
| Nokia mobile phones |  7% |
| Sony Ericsson mobile phones | 3% |
| Samsung mobile phones | 4% |
| Blackberry mobile phones | 1% |
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