Financial & competing interests disclosure
The Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands received unrestricted grants from: Biotronik (Berlin, Germany); Boston Scientific (Natick, MA, USA); GE Healthcare (Buckinghamshire, UK); Medtronic (MN, USA); and St Jude Medical (MN, USA). The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.