New Apple Watch heart monitor sounds great – here’s why it may not be

The fourth-generation Apple Watch

The Series 4 Apple Watch allows you to take an ECG of your heart by touching a button

Karl Mondon/Digital First Media/The Mercury News via Getty

The latest Apple Watch will give people warnings if their heart rate goes too high or low and let them take a readout of their heart’s electrical activity.

It’s being billed as a giant leap in home healthcare – but critics say it will lead to huge numbers of people getting told they have heart problems when they don’t.

The Series 4 watch will go on sale in …