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Implantable loop recorders in the investigation of unexplained syncope: a state of the art review
  1. Steve W Parry1,
  2. Iain G Matthews2
  1. 1Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, UK
  2. 2Department of Cardiology, Freeman Hospital, Newcastle upon Tyne, UK
  1. Correspondence to Dr Steve W Parry, Institute for Ageing and Health, Westgate Road, Newcastle University, Newcastle upon Tyne NE4 5PL, UK; swparry{at}


Since its introduction 15 years ago, the implantable loop recorder (ILR) has become the investigative tool of choice in recurrent unexplained syncope following negative initial investigations. This is based on very few randomised controlled clinical trials and modestly sized observational studies. Further controlled data are required to inform clinical practice with attention focused on empowering ILR-guided diagnosis, establishing the optimal timing of ILR use in syncope and embracing new technological advancements.

  • Recurrent syncope
  • implantable loop recorder
  • cardiac arrhythmia
  • neurally mediated syncope
  • presycnope
  • syncope

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  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.