Chris and Xand van Tulleken take a deeper dive into heart palpitations and the rise of wearable technology.

With devices like smartwatches now able to detect irregular heart rhythms, more people are being alerted to potential problems, often without any symptoms. But is this early detection saving lives, or creating new challenges?

Joined again by Consultant Cardiologist Dr Pranev Sharma, the docs explore how wearables actually work, how accurate they are, and what happens when they flag something abnormal. They unpack the balance between prevention and overdiagnosis, and ask whether we risk medicalising normal bodily sensations. They also look at how decisions are made about treatment, and whether these decisions are changing as more cases are detected through technology.

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Presenters: Drs Chris and Xand van Tulleken

Guest: Dr Pranev SharmaProducer: Maia Miller-LewisExecutive Producer: Rami TzabarEditor: Kirsten LassResearcher: Grace RevillTech Lead: Reuben HuxtableVisual Producer : Leon GowerDigital Lead: Richard BerryComposer: Phoebe McFarlaneSound Design: Olga Reed

At the BBC:

Assistant Commissioner: Greg SmithCommissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4.