Myocardial fibrosis and tissue alterations predict cardiovascular outcomes in chronic kidney disease-a prospective

Georgios Vavilis1,2, Yeshe M Kway1, Zahra Raisi-Estabragh3,4

  • 1Division of Cardiovascular Medicine, Radcliffe Department of Medicine, Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom.

Insights

Elevated native myocardial T1, a marker of fibrosis, predicts cardiovascular death, heart failure, and atrial fibrillation in chronic kidney disease (CKD) patients. This study highlights T1-mapping

Area of Science:

  • Cardiovascular Imaging
  • Nephrology
  • Biomarkers

Background:

  • Myocardial fibrosis is a significant feature of chronic kidney disease (CKD), contributing to its high cardiovascular burden.
  • Cardiovascular magnetic resonance (CMR) T1-mapping offers non-invasive quantification of diffuse myocardial fibrosis.
  • The prognostic significance of CMR T1-mapping in CKD populations requires further investigation.

Purpose of the Study:

  • To assess the association between native myocardial T1 values and mortality and incident cardiovascular outcomes in CKD patients.
  • To utilize a virtual twin-matching framework for enhanced comparability between CKD cases and controls.
  • To investigate the prognostic value of myocardial T1 in a UK Biobank imaging cohort.

Main Methods:

  • A 1:1 virtual twin-matched case-cohort study comparing CKD patients with phenotypically matched non-CKD controls.
  • Matching criteria included demographics, comorbidities, socioeconomic status, and cardiovascular risk factors.
  • Paired analyses compared myocardial T1, and Cox models evaluated the impact of a 1-SD T1 increase on outcomes over 4.9 years.

Main Results:

  • CKD participants exhibited trend-level higher myocardial T1 values compared to controls (p=0.063).
  • CKD patients had significantly higher cumulative incidences of all-cause mortality (11.3 vs. 3.8 per 1000 person-years; p=0.049) and heart failure (12.7 vs. 3.9 per 1000 person-years; p=0.021).
  • In CKD, a 1-SD increase in T1 was linked to higher risks of cardiovascular death (HR: 3.86), heart failure (HR: 2.00), and atrial fibrillation (HR: 2.04).

Conclusions:

  • Elevated native myocardial T1 is independently associated with increased risks of cardiovascular death, heart failure, and atrial fibrillation in CKD.
  • The virtual twin-matching framework enhances cohort comparability and internal validity for mechanistic inference.
  • Precision-matched cohort designs show promise for risk stratification in multimorbid populations.
Abstract

Related Concept Videos

Chronic Kidney Disease II: Clinical Manifestations01:24

Chronic Kidney Disease II: Clinical Manifestations

Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
Chronic Kidney Disease I: Introduction01:25

Chronic Kidney Disease I: Introduction

Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
Chronic Kidney Disease IV: Nursing Management01:18

Chronic Kidney Disease IV: Nursing Management

Nursing management is essential for preventing complications, maintaining stability, and improving patients' quality of life in chronic kidney disease (CKD). By using a structured approach, nurses help slow CKD progression and support effective patient care​.1. Comprehensive patient assessmentEffective management begins with nurses reviewing the patient’s medical history, and identifying key risk factors like diabetes, hypertension, and nephrotoxic drug use. Nurses assess signs of fluid...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
Chronic Kidney Disease III: Interprofessional Care01:28

Chronic Kidney Disease III: Interprofessional Care

Chronic kidney disease (CKD) requires collaborative and comprehensive management. CKD progresses through stages and can lead to end-stage kidney disease (ESKD) if untreated. Interprofessional collaboration and patient education are crucial, enabling patients to manage their health and improve their quality of life.Diagnostic approach for chronic kidney diseaseThe diagnosis of CKD primarily focuses on the glomerular filtration rate (GFR), which assesses kidney function by measuring how well...