Statistics from Altmetric.com
Contributors FLN and MDL wrote and approved the final manuscript and MCQs.
Funding This research received no specific grant from any funding agency in the public,commercial or not-for-profit sectors.
Competing interests MDL is supported by the Barts Charity and has received speaker honoraria and consultancy fees from CVRx, St Jude Medical, ROX Medical and Cardiosonic.
Patient consent Not required.
Provenance and peer review Commissioned; externally peer reviewed.
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