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Original research article
The HASTE Protocol: a standardised CT Coronary Angiography service operated from a District General Hospital
  1. Iain Thomas Parsons1,
  2. Clare Bannister1,
  3. John Badelek2,
  4. Mark Ingram2,
  5. Emma Wood2,
  6. Alex Horton2,
  7. Michael Hickman1 and
  8. Edward Leatham1
  1. 1 Department of Cardiology, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
  2. 2 Department of Radiology, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
  1. Correspondence to Dr Iain Thomas Parsons; iainparsons{at}


Introduction CT coronary angiography (CTCA) has excellent sensitivity but lacks specificity when compared with invasive coronary angiography (ICA) particularly in patients with a high coronary calcium burden. CTCA has been shown in large trials to decrease the requirement for diagnostic ICA and provide diagnostic clarity. We describe the methodology used to provide a standardised CTCA service established in a District General Hospital, which may assist other hospitals aiming to develop a cardiac CT service.

Methods Scan request forms, authorisation and patient instruction were recorded. Patient preparation prior to CTCA as well as exclusion and inclusion criteria were documented. Scans were interpreted using a multidisciplinary team (MDT) approach in order to organise follow-up, medication and further investigation.

Results Over 6 months, 157 consecutive scans were performed. CTCA was completed in 88% (n=138/157) and considered of diagnostic quality in 82% (n=129/157). The median radiation dose was 3.42 mSv. Overall, 64% of patients had evidence of coronary calcium. Following MDT review, 72% (n=113/157) of patients were discharged without requiring invasive angiography. 15% (n=24/157) of patients went on to have invasive angiography showing non-obstructive disease and 13% (20/157) of patients underwent percutaneous coronary intervention (11%) or bypass surgery (1%).

Discussion Appropriate referrals, patient preparation and scan quality remain significant factors in running a CTCA service. Despite this, the vast majority of patients can be discharged on the basis of the CTCA alone. An MDT approach is key to the delivery of a cardiac CT service.

  • ct scanning
  • coronary artery disease
  • coronary angiography

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  • Contributors ITP analysed the data and drafted the manuscript. CB analysed the data and reviewed the manuscript. JB assisted with the technological aspects and reviewed the manuscript. AH, EW, MI and MH reviewed the manuscript. EL contributed to overarching review of the content.

  • Funding The authors are grateful to the Heart and Stroke Trust Endeavour (HASTE), Registered UK Company Number 05185057, for their generous grant to publish this paper open access.

  • Competing interests None declared.

  • Patient consent Not required.

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

  • Data sharing statement No additional data are available.

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