Holter Monitoring Service continuing (with precautions) during current COVID19 pandemic

About Us

The Holter Monitoring Service is provided by two experienced UK cardiologists with a broad range of expertise, both working as Specialists at Dick White Referrals, a multidisciplinary referral centre in Cambridgeshire. A strength of the service is the access to very many years combined experience in Specialist referral practice and, where appropriate, multidisciplinary input from other Specialists within the practice.

Jon Wray

RCVS Specialist in Small Animal Medicine (Internal Medicine)
Hon. Associate Professor, University of Nottingham

Jon graduated from Bristol University and worked in mixed animal practice for 2 years. He completed his Residency at Bristol and held clinical and academic posts at Willows Referral Service and the Animal Health Trust before returning to Bristol as Clinical Fellow in Cardiorespiratory Medicine. He holds the RCVS Certificate, Diploma and Specialist Recognition in Small Animal Internal Medicine, the Certificate in Veterinary Cardiology and is a Fellow of the Royal College of Veterinary Surgeons (by Meritorious Contribution to Clinical Practice) and a Fellow of the Royal Society of Biology. He joined DWR in 2008 and is Head of the Cardiology Service.

Jon has been Chief Examiner for the RCVS Certificate and Diploma in Small Animal Medicine and is author of Canine Internal Medicine: What’s Your Diagnosis. As well as publishing widely, he has lectured extensively both in the UK and internationally in the fields of Internal Medicine, Cardiology and Interventional Radiology. His particular fields of interest are all aspects of cardiorespiratory medicine, interventional radiology and interventional cardiology, and in investigation of episodic weakness and collapse.

Helen Fewson-Reeve

Telemedicine Manager

Helen returned to DWR in 2017 having first joined us in 2009. In the intervening period, she gained valuable experience while working for a global Telemedicine company which has put her in an ideal position to run our Telemedicine department and Holter Monitoring service.

Helen may be contacted for any logistical issues or enquires regarding the Holter Monitoring service.

Hayley McDonald 


Hayley graduated from Massey University in 2009 and worked in first opinion and emergency care practice in Australia until 2014. She then moved to the UK and commenced a 3-year Residency Programme at the University of Glasgow. Following completion of her Residency, she remained at Glasgow as a Clinician in Veterinary Cardiorespiratory Medicine and joined DWR in 2019.

Veterinary colleagues wishing not only to receive Holter interpretation but to discuss onward referral of cases to the Cardiology Service at Dick White Referrals (for example for assessment for suitability for permanent pacemaker implantation) should contact DWR on 01638 572012.

Cardiology Referral Service

Please see section on ‘Cardiology Referral Service’ for further details