The Apple Watch Series 4 has all sorts of neat stuff--including ECG and heart-tracking functionality.
Digital Trends asked cardiac electrophysiologist, Dr. Nicholas Tullo how well it really works.
Dr. Tullo called the technology 'valuable,' saying it was like carrying around a personal ECG machine.
It’s probably not a good idea for a hypochondriac, but the potential advantages far outweigh any potential downside. Dr.
