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Contributions of interstitial fluid (ISF) flow within the myocardial microcirculation is not well understood despite its importance due to difficulties in measurements. For analysing a contribution of interstitial fluid flow within myocardial microcirculation, we developed a computational model of myocardial microcirculation by introducing convection by the ISF flow into an existing myocardial microcirculation model, and performed simulations with varied ISF flows in normal and hypoperfusion conditions. Simulation results show that the ISF flow has a contribution only with low capillary flow. This might suggest partial comensation of oxygen supply by the ISF flow under ischemic conditions.
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http://dx.doi.org/10.1109/EMBC.2017.8037653 | DOI Listing |
Front Cardiovasc Med
December 2024
Department of Cardiology, The 904th Hospital of the PLA Joint Logistics Support Force, Wuxi, Jiangsu, China.
Backgroud: Coronary slow flow (CSF) is a common phenomenon of coronary microcirculation dysfunction, and is closely related to elevated blood glucose and fibrinogen (FIB) levels. However, whether immediate blood glucose and FIB levels affect coronary blood flow during primary percutaneous coronary intervention (PCI) remains unclear.
Objective: To explore the correlation between admission blood glucose (ABG), fibrinogen (FIB) and slow blood flow during primary PCI for acute ST segment elevation myocardial infarction (STEMI).
Radiology
December 2024
From the Centro Cardiologico Monzino, IRCCS, Via C. Belgioioso 173, Milan, Italy (D.A., S.M., D.T., E.C., G.L., S. Galli, G.M., L.G., G.T., S.T., S. Gili, P.M., P.O., V.M., D.M., M.S., C.G., E.M., A.B., M.E.M., A.A., A F., G.P., A.L.B.); Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy (D.A.); IRCCS Ospedale Galeazzi Sant'Ambrogio, Milan, Italy (E.C., G.M., L.G., V.M., D.M., M.S., E.G., P.P., E.M., A.L.B.); Cardiovascular Center Aalst, OLV Hospital, Aalst, Belgium (J.S., M.B., E.G., P.P., K.S., T.M., C.C.); Department of Medicine, Division of Cardiology, Showa University School of Medicine, Tokyo, Japan (K.S., T.M.); Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy (G.P.); and Department of Radiology, Azienda Ospedaliera di Padova, Padua, Italy (L.Z.).
Background The detection of in-stent restenosis (ISR) with coronary CT angiography (CCTA) is challenging, but CT perfusion (CTP) has demonstrated improved diagnostic accuracy over CCTA in patients with stents. However, there are limited data on the performance of dynamic CTP, which allows noninvasive adjudication of regional myocardial blood flow. Purpose To compare the diagnostic performance of regadenoson-stress dynamic CTP with that of CCTA, using fractional flow reserve (FFR) and the index of microvascular resistance (IMR) as reference standards for epicardial coronary circulation and coronary microcirculation, respectively.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
School of Life Science, National Taiwan Normal University, Taipei 117, Taiwan.
2'-Hydroxycinnamaldehyde (HCA), a natural product isolated from the bark of , has anti-inflammatory and anti-tumor activities. In this study, we explored whether HCA preconditioning could protect the heart against ischemia/reperfusion (I/R)-induced oxidative injury through cytosolic Bcl-2-associated athanogene 3 (BAG3) upregulation. In vivo HCA preconditioning was performed intraperitoneally in adult male Wistar rats (50 mg/kg body weight) three times/week for 2 weeks before cardiac I/R injury.
View Article and Find Full Text PDFJAMA Netw Open
December 2024
Department of Nephrology and Endocrinology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark.
Importance: Long-term use of anabolic androgenic steroids (AASs) is associated with a high risk of left ventricular hypertrophy, heart failure with reduced systolic function, and early sudden death, with the mechanism of progression being understudied. Early and persistent impaired myocardial microcirculation could be of clinical importance and a potential underlying mechanism of frequent and early cardiac disease among individuals with AAS use and a future potential target for intervention.
Objective: To investigate coronary microcirculation by measuring myocardial flow reserve (MFR) in men with current and former AAS use compared with controls with no prior AAS use, using cardiac rubidium 82 (82Rb) positron emission tomography/computed tomography (PET/CT).
Adv Sci (Weinh)
December 2024
Department of Cardiology, State Key Laboratory of Organ Failure Research, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, 510515, China.
Ischemic preconditioning (IPC) therapy application to attenuate myocardial ischemia-reperfusion (MI/R) injury in clinical practice remains challenging. The secretome, derived from hypoxia-preconditioned cardiomyocytes (SHPC), potentially mimics the IPC microenvironment and facilitates IPC clinical translation. This study aims to determine whether SHPC can be a feasible alternative to IPC for attenuating MI/R injury, and to identify the functional factor of SHPC.
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