Interesting read about electrocardiogram (ECG), machine learning (ML) and convolutional neural network (CNN) that outperforms humans in diagnosis, since it has a large training data set.
Keep in mind though, that two out of five writers of the paper are from
http://irhythmtech.com/ and the measurements were taken with their Zio product (patch you wear that records for 14 days), but that doesn't make the results any less valuable.