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![A sample from the Holter recording displaying the heart rate decreasing... | Download Scientific Diagram A sample from the Holter recording displaying the heart rate decreasing... | Download Scientific Diagram](https://www.researchgate.net/publication/288171405/figure/fig1/AS:540932642951168@1505979800134/A-sample-from-the-Holter-recording-displaying-the-heart-rate-decreasing-to-25-bpm-with.png)