Abstract
Aims
Type 2 diabetes mellitus (T2DM) increases the risk of major cardiovascular events. In SAVOR-TIMI53 trial, the excess heart failure (HF) hospitalization among patients with T2DM in the saxagliptin group remains poorly understood. Our aim was to evaluate left ventricular (LV) diastolic function after 6 months of saxagliptin treatment using cardiac magnetic resonance imaging (CMR) in patients with T2DM.
Methods
In this prospective study, 16 T2DM patients without HF were prescribed saxagliptin as part of routine guideline-directed management. CMR performed at baseline and 6 months after initiation of saxagliptin treatment were evaluated in a blinded fashion. We assessed LV diastolic function by measuring LV peak filling rate with correction for end-diastolic volume (PFR/LVEDV), time to peak filling rate with correction for cardiac cycle (TPF/RR), and early diastolic strain rate parameters [global longitudinal diastolic strain rate (GLSR-E), global circumferential diastolic strain rate (GCSR-E)] by feature tracking (FT-CMR).
Results
Among the 16 patients (mean age of 59.9, 69% males, mean hemoglobin A1c 8.3%, mean left ventricular ejection fraction 57%), mean PFR was 314 ± 108 ml/s at baseline and did not change over 6 months (− 2.7, 95% CI − 35.6, 30.2, p = 0.86). There were also no significant changes in other diastolic parameters including PFR/EDV, TPF, TPF/RR, and GLSR-E and GCSR-E (all p > 0.50).
Conclusion
In T2DM patients without HF receiving saxagliptin over 6 months, there were no significant subclinical changes in LV diastolic function as assessed by CMR.
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Data availability
Data can be made available upon request.
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Acknowledgements
We are indebted to all the patients and study staff who contributed to this study.
Funding
The proposal was funded by an unrestricted educational grant from Astra Zeneca that manufactures saxagliptin.
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Dr KCK Wong, no conflicts. Dr HS Ismail, no conflicts. Dr KA Connelly holds the Keenan Chair in Research Leadership at Unity Health Toronto, University of Toronto and reports receiving research grants to his institution from AstraZeneca and Boehringer Ingelheim, support for travel to scientific meeting from Boehringer Ingelheim and honoraria for speaking engagements and ad hoc participation in advisory boards from AstraZeneca, Boehringer Ingelheim and Janssen. Dr S Verma reports receiving research grant support and/or speaking honoraria from Amarin, Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Canadian Medical and Surgical Knowledge Translation Research Group, Eli Lilly, HLS Therapeutics, Janssen, Merck, Novartis, Novo Nordisk, Pfizer, PhaseBio, Sanofi, and S&L Solutions. Dr Verma is the President of the Canadian Medical and Surgical Knowledge Translation Research Group, a federally incorporated not-for-profit physician organization Dr MY Ng reports receiving research grant support and/or speaking/consulting honoraria from Circle, Bayer, TeraRecon, GE and Boehringer Ingelheim. Dr DP Deva, no conflicts. Dr AT Yan reports receiving research grant support from AstraZeneca. Dr Laura Jimenez-Juan, no conflicts.
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The study was approved by St. Michael’s Hospital Research Ethics Board.
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All participants were consented to participate. Study team ensured that participants were made aware that participation or lack thereof will have no impact on clinical care provided.
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Wong, K.C.K., Ismail, H.S., Connelly, K.A. et al. Relationship between saxagliptin use and left ventricular diastolic function assessed by cardiac MRI. Acta Diabetol 61, 91–97 (2024). https://doi.org/10.1007/s00592-023-02177-x
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DOI: https://doi.org/10.1007/s00592-023-02177-x