Publications by authors named "Adrian Quan"

Background: Saphenous vein graft (SVG) failure remains a substantial challenge after coronary artery bypass graft (CABG). LDL cholesterol (LDL-C) is a causal risk factor for atherosclerosis, but its role in SVG failure is not well established. We evaluated whether early initiation of intensive LDL-C lowering with evolocumab could reduce SVG failure.

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Background And Aims: Glucagon-like peptide-1 receptor agonists (GLP-1RAs) reduce major atherosclerotic cardiovascular events in individuals living with either diabetes or obesity. Since the turnover of vascular regenerative (VR) stem and progenitor cells has been demonstrated to modulate vessel repair and atherothrombotic risk, this study aimed to determine the effect of the GLP-1RA semaglutide on the levels of circulating VR cells.

Methods: SEMA-VR CardioLink-15 was a randomized translational trial of usual care vs.

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Aims: Lipoprotein(a) [Lp(a)] is a causal risk factor for atherosclerotic cardiovascular disease (ASCVD); however, the relationship between Lp(a) and the capacity for vascular repair remains unclear. Depletion of vascular regenerative (VR) progenitor cells has been shown to be a novel indicator of compromised vascular repair in people living with cardiometabolic disorders. The purpose of this study was to determine if elevated levels of Lp(a) modify VR cell content properties.

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Background: Prior studies comparing leaflet resection vs. leaflet preservation for surgical repair of mitral regurgitation (MR) caused by prolapse have focused predominately on measurement of left ventricular ejection fraction without adjusting for loading conditions. This post hoc sub-analysis evaluated subclinical differences in myocardial mechanics pre- mitral valve (MV) repair, immediately after, and 1-year post-repair, as well as differences between leaflet resection and preservation strategies.

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Article Synopsis
  • SGLT2 inhibitors like empagliflozin can improve heart failure outcomes in type 2 diabetes, but how they work is still not well understood.
  • A study involving 90 patients with coronary artery disease and type 2 diabetes assessed the effects of empagliflozin on left atrial (LA) volume and function over 6 months.
  • The results showed no significant changes in LA volume or function between the empagliflozin group and the placebo group, indicating that the drug may not impact these specific heart aspects.
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Glucagon-like peptide-1 receptor agonists (GLP-1RAs) and sodium-glucose cotransporter-2 (SGLT2) inhibitors are guideline-recommended therapies for the management of type 2 diabetes (T2D), atherosclerotic cardiovascular disease, heart failure, and chronic kidney disease. We previously observed in people living with T2D and coronary artery disease that circulating vascular regenerative (VR) progenitor cell content increased following 6-mo use of the SGLT2 inhibitor empagliflozin. In this post hoc subanalysis of the ORIGINS-RCE CardioLink-13 study (ClinicalTrials.

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Article Synopsis
  • - REDUCE-IT trial showed icosapent ethyl (IPE) decreased major cardiovascular events by 25%, but the exact reasons for its benefits were unclear, leading to the IPE-PREVENTION CardioLink-14 trial to explore its effect on vascular regenerative (VR) cell content in individuals with high triglycerides.
  • - In the study, 70 individuals on statins were given either IPE (4 g/day) or usual care; results showed IPE increased the frequency of ALDHSSC CD133 progenitor cells and reduced oxidative stress in progenitor cells, even as overall ALDHSSC cell frequency decreased.
  • - The findings suggest that IPE not only impacts VR cell content but may also
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Atherosclerotic cardiovascular disease is a chronic condition that often copresents with type 2 diabetes and obesity. Glucagon-like peptide-1 receptor agonists (GLP-1RAs) are incretin mimetics endorsed by major professional societies for improving glycemic status and reducing atherosclerotic risk in people living with type 2 diabetes. Although the cardioprotective efficacy of GLP-1RAs and their relationship with traditional risk factors are well established, there is a paucity of publications that have summarized the potentially direct mechanisms through which GLP-1RAs mitigate atherosclerosis.

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Article Synopsis
  • South Asian individuals have a higher prevalence of cardiometabolic diseases compared to White Europeans, prompting a study on their vascular regenerative cell content.
  • The study included 60 South Asians and 60 White Europeans, revealing that South Asians had lower levels of key regenerative cells and exhibited more severe diabetes symptoms.
  • Findings suggest that South Asians possess compromised vascular repair capabilities, which may explain why they face greater cardiovascular risks.
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Background: This exploratory sub-analysis of the EMPA-HEART CardioLink-6 trial examined whether the previously reported benefit of the sodium-glucose cotransporter 2 (SGLT2) inhibitor empagliflozin on left ventricular (LV) mass (LVM) regression differs between individuals of South Asian and non-South Asian ethnicity.

Methods: EMPA-HEART CardioLink-6 was a double-blind, placebo-controlled clinical trial that randomised 97 individuals with type 2 diabetes mellitus (T2DM) and coronary artery disease (CAD) to either empagliflozin 10 mg daily or placebo for 6 months. LV parameters and function were assessed using cardiac magnetic resonance imaging.

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Background: This exploratory analysis of the randomized controlled Aortic Surgery Cerebral Protection Evaluation CardioLink-3 trial sought to determine if cerebral oximetry desaturation during elective proximal arch repair is associated with detrimental postoperative neuroradiologic and neurofunctional outcomes.

Methods: Cerebral oximetry and pre- and postoperative brain magnetic resonance imaging data from 101 participants were analyzed. Oximetry data from the trial allocation groups were compared; the relationships between cerebral oximetry indices and new ischemic cerebral lesions on magnetic resonance imaging and neurologic outcomes were also evaluated.

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Sodium glucose-cotransporter 2 (SGLT2) inhibitors have been reported to reduce cardiovascular events and heart failure in people with and without diabetes. These medications have been shown to counter regenerative cell exhaustion in the context of prevalent diabetes. This study sought to determine if empagliflozin attenuates regenerative cell exhaustion in people without diabetes.

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Purpose: This study evaluated the use of a wearable, patch-based cardiac rhythm monitoring device in detecting postoperative atrial fibrillation (POAF) among cardiac surgical patients within 30 days after hospital discharge.

Description: From the SEARCH-AF (The Post-Surgical Enhanced Monitoring for Cardiac Arrhythmias and Atrial Fibrillation) CardioLink-1 trial, this study examined rates of POAF according to surgery type and the incremental value of continuous cardiac rhythm monitoring among patients who underwent valve surgery. The primary outcome was cumulative atrial fibrillation or atrial flutter lasting for ≥6 minutes detected by continuous monitoring or atrial fibrillation or atrial flutter documented by a 12-lead electrocardiogram within 30 days of randomization.

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Background: The cardiovascular (CV) benefits of sodium-glucose transport protein 2 inhibitors have been attributed, in part, to cardiac reverse remodelling. The EMPA-HEART CardioLink-6 study reported that sodium-glucose cotransporter-2 inhibition for 6 months with empagliflozin was associated with a significant reduction in left ventricular mass indexed to body surface area (LVMi). In this sub-analysis, we evaluated whether baseline LVMi may influence how empagliflozin affects cardiac reverse remodelling.

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Background: Whether statins reliably reduce the risk of postoperative atrial fibrillation (POAF) in patients undergoing cardiac surgery remains controversial. We sought to determine the impact of statin use on new-onset postdischarge POAF in the Post-urgical nhnced Monitoing for ardiac Arrythmias and trial ibrillation (SEARCH-AF) CardioLink-1 randomized controlled trial.

Methods: We randomized 336 patients with risk factors for stroke (CHADS-VASc score ≥ 2) and no history of preoperative atrial fibrillation (AF) to 30-day continuous cardiac rhythm monitoring after discharge from cardiac surgery with a wearable, patched-based device or to usual care.

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Aims: Given recent suggestions that serum levels of insulin-like growth factor-binding protein 7 (IGFBP7) may identify patients who derive greater cardiorenal benefits from treatment with sodium-glucose transport 2 inhibitors (SGLT2i), this exploratory sub-analysis of the EMPA-HEART CardioLink-6 randomized controlled trial evaluated the association between serum levels of IGFBP7 and empagliflozin-mediated left ventricular mass regression.

Methods And Results: The EMPA-HEART CardioLink-6 trial used gold-standard cardiac magnetic resonance imaging to detect change in left ventricular mass indexed to body surface area (LVMi) following 6 months of treatment with empagliflozin or matching placebo in 97 patients with type 2 diabetes and coronary artery disease. Serum samples were collected at baseline and analysed for IGFBP7 using an enzyme-linked immunosorbent assay.

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Aims: The neutrophil-to-lymphocyte ratio (NLR) is a marker of systemic inflammation and plays a critical role in the assessment and prognosis in patients with heart failure. The EMPA-HEART CardioLink-6 trial demonstrated that patients with type 2 diabetes (T2D) and coronary artery disease (CAD) treated with a sodium-glucose transport protein 2 inhibitor for 6 months experienced regression in left ventricular mass. Given this, we evaluated the relationship of baseline NLR and cardiac reverse remodelling in the entire cohort of this trial.

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Aims: The duration of type 2 diabetes mellitus (T2DM) is an important determinant of diabetes severity. The EMPA-HEART CardioLink-6 trial reported significant left ventricular (LV) mass indexed to body surface area (LVMi) regression in patients treated with the sodium-glucose cotransporter 2 inhibitor (SGLT2i) empagliflozin for 6 months. This exploratory sub-analysis of the same trial investigated the association between T2DM duration and LVMi regression.

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Objective: Intraoperative predictors of functional mitral valve (MV) stenosis after surgical repair of mitral regurgitation (MR) caused by prolapse remain poorly characterised. This study evaluated the effect of annuloplasty size on postoperative MV haemodynamics during exercise and evaluated predictors of MV hemodynamics.

Methods: 104 patients were randomly assigned to leaflet resection or preservation for surgical repair of MR in the Canadian Mitral Research Alliance CardioLink-2 study.

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Article Synopsis
  • The study looked at 200 South Asian participants in Canada with existing cardiovascular disease to see how well the results of a previous study (REDUCE-IT) on a medication called icosapent ethyl (IPE) could apply to them.
  • Findings showed that many of these high-risk, statin-treated South Asians are eligible for IPE, highlighting a significant need for tailored treatments within this demographic to help reduce their higher cardiovascular risks.
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Background: Sodium-glucose cotransporter 2 inhibitors have been demonstrated to promote reverse cardiac remodeling in people with diabetes or heart failure. Although it has been theorized that sodium-glucose cotransporter 2 inhibitors might afford similar benefits in people without diabetes or prevalent heart failure, this has not been evaluated. We sought to determine whether sodium-glucose cotransporter 2 inhibition with empagliflozin leads to a decrease in left ventricular (LV) mass in people without type 2 diabetes or significant heart failure.

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