Special vests are being used by doctors in the UK to precisely diagnose abnormal heart rhythm.

They hope the technology could eventually help more people suffering from heart palpitations.
The Arrythmia Alliance described the tests as a "fantastic development."
The work is in its early stages - doctors have used the vests on 40 patients so far.
However, they are impressed with the precision that each vest can give them.
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Computer images are then generated to produce an "electrical map" of the patient's heart.
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Dr Prapa Kanagaratnam, the consultant cardiologist leading the work, said, "it was very appealing right from the start to be able to get measurements of the heart's electrical activity with that degree of precision, without having to initially put wires into the heart."
Each vest costs about 1,000 pounds - the doctors say this compares well with conventional diagnosis techniques, especially given the benefit of treating patients they were sometimes not able to previously help.
Source-ANI