Dataset Information

Coronary Sinus Narrowing Improves Right Ventricular Function.

ABSTRACT:

SUBMITTER: Mann TD

PROVIDER: S-EPMC9627899 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Coronary Sinus Narrowing Improves Right Ventricular Function.

Mann Tomer D TD Kofman Natalia N Katz Asaf A Konigstein Maayan M Perl Michal Laufer ML Zuzut Meital Elbaz ME Revivo Miri M Topilsky Yan Y Banai Shmuel S Havakuk Ofer O

JACC. Asia 20220607 3

PMID: 36338412

Similar Datasets

Project description:Previous studies have suggested associations between coronary microvascular dysfunction (CMD) and alterations in left ventricular (LV) structure and function Data are however scarce regarding the right ventricular (RV). In the context of CMD, the RV could be affected via mechanisms potentially involving ischemia from CMD, shared pathophysiological milieu leading to adverse ventricular remodeling, and/or increased afterload secondary to increased LV end-diastolic pressure or heart failure with preserved ejection fraction (HFpEF) with pulmonary hypertension. We evaluated the relationship between measures of RV structure/function and invasively measured CMD in individuals with suspected ischemia and no obstructive coronary artery (INOCA) disease. We included 297 participants from the WISE-HFpEF, WISE-preHFpEF and WISE-CVD cohorts, who underwent cardiac magnetic resonance imaging (CMRI) and coronary function testing to measure coronary flow reserve (CFR) in response to adenosine and coronary blood flow change in response to acetylcholine (∆CBF). We assessed the correlation between RV parameters on CMRI and coronary microvascular function (CFR and ∆CBF). Participants had a mean age 54±11 years. Of them, 104 (39%) had hypertension, 31 (11%) had diabetes, and 18 (7%) had chronic obstructive pulmonary disease. Mean RV end-diastolic volume was 66.6±11.0 mL/m2, RV ejection fraction was 62.7%±5.6% and RV longitudinal strain was -27.2%±3.5%. We found no significant correlation between RV parameters and coronary microvascular function. This is the first study to report associations between invasively measured CMD and CMRI parameters of RV structure and function among patients with suspected INOCA. Despite a large sample size, we found no significant relationship between RV structure or function and CMD. These results suggest that RV abnormalities do not precede and are not concurrent with CMD in suspected INOCA participants. Longitudinal prospective studies are needed to evaluate if RV deterioration may occur later during the course of CMD and among patients with HFpEF.

Project description:Background: Right ventricular (RV) performance is a key determinant of mortality in pulmonary arterial hypertension (PAH). RV failure is characterized by metabolic dysregulation with unbalanced anaerobic glycolysis, oxidative phosphorylation, and fatty acid oxidation (FAO). We previously found that acetazolamide (ACTZ) treatment modulates the pulmonary inflammatory response and ameliorates experimental PAH. Objective: To evaluate the effect of ACTZ treatment on RV function and metabolic profile in experimental PAH. Design/Methods: In the Sugen 5416/hypoxia (SuHx) rat model of severe PAH, RV transcriptomic analysis was performed by RNA-seq, and top metabolic targets were validated by RT-PCR. We assessed the effect of therapeutic administration of ACTZ in the drinking water on hemodynamics by catheterization [right and left ventricular systolic pressure (RVSP and LVSP, respectively)] and echocardiography [pulmonary artery acceleration time (PAAT), RV wall thickness in diastole (RVWT), RV end-diastolic diameter (RVEDD), tricuspid annular plane systolic excursion (TAPSE)] and on RV hypertrophy (RVH) by Fulton's index (FI) and RV-to-body weight (BW) ratio (RV/BW). We also examined myocardial histopathology and expression of metabolic markers in RV tissues. Results: There was a distinct transcriptomic signature of RVH in the SuHx model of PAH, with significant downregulation of metabolic enzymes involved in fatty acid transport, beta oxidation, and glucose oxidation compared to controls. Treatment with ACTZ led to a pattern of gene expression suggestive of restored metabolic balance in the RV with significantly increased beta oxidation transcripts. In addition, the FAO transcription factor peroxisome proliferator-activated receptor gamma coactivator 1-alpha (Pgc-1α) was significantly downregulated in untreated SuHx rats compared to controls, and ACTZ treatment restored its expression levels. These metabolic changes were associated with amelioration of the hemodynamic and echocardiographic markers of RVH in the ACTZ-treated SuHx animals and attenuation of cardiomyocyte hypertrophy and RV fibrosis. Conclusion: Acetazolamide treatment prevents the development of PAH, RVH, and fibrosis in the SuHx rat model of severe PAH, improves RV function, and restores the RV metabolic profile.

Dataset Information

Coronary Sinus Narrowing Improves Right Ventricular Function.

Publications

Coronary Sinus Narrowing Improves Right Ventricular Function.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets