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Sidhu BS, Rua T, Gould J, Porter B, Sieniewicz B, Niederer S, Rinaldi CA, Carr-White G. Economic evaluation of a dedicated cardiac resynchronisation therapy preassessment clinic. Open Heart 2020; 7:openhrt-2020-001249. [PMID: 32690548 PMCID: PMC7373313 DOI: 10.1136/openhrt-2020-001249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/12/2020] [Accepted: 05/20/2020] [Indexed: 01/01/2023] Open
Abstract
Introduction Patient evaluation before cardiac resynchronisation therapy (CRT) remains heterogeneous across centres and it is suspected a proportion of patients with unfavourable characteristics proceed to implantation. We developed a unique CRT preassessment clinic (CRT PAC) to act as a final review for patients already considered for CRT. We hypothesised that this clinic would identify some patients unsuitable for CRT through updated investigations and review. The purpose of this analysis was to determine whether the CRT PAC led to savings for the National Health Service (NHS). Methods A decision tree model was made to evaluate two clinical pathways; (1) standard of care where all patients initially seen in an outpatient cardiology clinic proceeded directly to CRT and (2) management of patients in CRT PAC. Results 244 patients were reviewed in the CRT PAC; 184 patients were eligible to proceed directly for implantation and 48 patients did not meet consensus guidelines for CRT so were not implanted. Following CRT, 82.4% of patients had improvement in their clinical composite score and 57.7% had reduction in left ventricular end-systolic volume ≥15%. Using the decision tree model, by reviewing patients in the CRT PAC, the total savings for the NHS was £966 880. Taking into consideration the additional cost of the clinic and by applying this model structure throughout the NHS, the potential savings could be as much as £39 million. Conclusions CRT PAC appropriately selects patients and leads to substantial savings for the NHS. Adopting this clinic across the NHS has the potential to save £39 million.
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Affiliation(s)
- Baldeep Singh Sidhu
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom .,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Tiago Rua
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Justin Gould
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Bradley Porter
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Benjamin Sieniewicz
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Steven Niederer
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Christopher Aldo Rinaldi
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
| | - Gerald Carr-White
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom.,Cardiology Department, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom
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Halamek J, Leinveber P, Viscor I, Smisek R, Plesinger F, Vondra V, Lipoldova J, Matejkova M, Jurak P. The relationship between ECG predictors of cardiac resynchronization therapy benefit. PLoS One 2019; 14:e0217097. [PMID: 31150418 PMCID: PMC6544221 DOI: 10.1371/journal.pone.0217097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 05/04/2019] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION Cardiac resynchronization therapy (CRT) is an effective treatment that reduces mortality and improves cardiac function in patients with left bundle branch block (LBBB). However, about 30% of patients passing the current criteria do not benefit or benefit only a little from CRT. Three predictors of benefit based on different ECG properties were compared: 1) "strict" left bundle branch block classification (SLBBB); 2) QRS area; 3) ventricular electrical delay (VED) which defines the septal-lateral conduction delay. These predictors have never been analyzed concurrently. We analyzed the relationship between them on a subset of 602 records from the MADIT-CRT trial. METHODS & RESULTS SLBBB classification was performed by two experts; QRS area and VED were computed fully automatically. High-frequency QRS (HFQRS) maps were used to inspect conduction abnormalities. The correlation between SLBBB and other predictors was R = 0.613, 0.523 and 0.390 for VED, QRS area in Z lead, and QRS duration, respectively. Scatter plots were used to pick up disagreement between the predictors. The majority of SLBBB subjects- 295 of 330 (89%)-are supposed to respond positively to CRT according to the VED and QRS area, though 93 of 272 (34%) non-SLBBB should also benefit from CRT according to the VED and QRS area. CONCLUSION SLBBB classification is limited by the proper setting of cut-off values. In addition, it is too "strict" and excludes patients that may benefit from CRT therapy. QRS area and VED are clearly defined parameters. They may be used to optimize biventricular stimulation. Detailed analysis of conduction irregularities with CRT optimization should be based on HFQRS maps.
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Affiliation(s)
- Josef Halamek
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Pavel Leinveber
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Ivo Viscor
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Radovan Smisek
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Filip Plesinger
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Vlastimil Vondra
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Jolana Lipoldova
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Magdalena Matejkova
- International Clinical Research Center, St. Anne’s University Hospital, Brno, Czech Republic
| | - Pavel Jurak
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
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