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Monitoring of perioperative tissue perfusion and impact on patient outcomes.
J Cardiothorac Surg
January 2025
Department of Anesthesiology, Zhongda hospital, Southeast University, No. 87 Dingjiaqiao, Nanjing City, 210009, Jiangsu Province, China.
Monitoring perioperative tissue perfusion is crucial in clinical anesthesia to protect organs and ensure patient safety. Indicators like hemodynamic parameters, tissue metabolism, and microcirculation markers are used for assessment. Studies show intraoperative hypotension negatively impacts outcomes, though blood pressure alone may not reflect tissue perfusion accurately.
View Article and Find Full Text PDFImpaired myocardial perfusion and myocardial inflammation of acute myopericarditis associated with COVID-19.
J Cardiol Cases
January 2025
Department of Cardiology, Sapporo Kojinkai Memorial Hospital, Sapporo, Japan.
Unlabelled: Myocarditis and pericarditis, or myopericarditis, is a rare, albeit life-threatening, cardiac complication of coronavirus disease 2019 (COVID-19). Although most patients recover from myocardial inflammation within weeks of the acute infection, there are concerns about acute and long-term myocardial injury. Coronary microvascular dysfunction and myocardial inflammation in the affected myocardium might be key factors in developing acute COVID-19-associated myopericarditis.
View Article and Find Full Text PDFAssessment of Coronary Microcirculation with High Frame-Rate Contrast-Enhanced Echocardiography.
Ultrasound Med Biol
March 2025
Biomedical Engineering, Cardiology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands; Medical Imaging, Department of Imaging Physics, Faculty of Applied Sciences, Delft University of Technology, Delft, the Netherlands. Electronic address:
Objective: Assessing myocardial perfusion in acute myocardial infarction is important for guiding clinicians in choosing appropriate treatment strategies. Echocardiography can be used due to its direct feedback and bedside nature, but it currently faces image quality issues and an inability to differentiate coronary macro- from micro-circulation. We previously developed an imaging scheme using high frame-rate contrast-enhanced ultrasound (HFR CEUS) with higher order singular value decomposition (HOSVD) that provides dynamic perfusion and vascular flow visualization.
View Article and Find Full Text PDFFlow-mediated dilation decreases in women, but not men, following mild acute intermittent hypoxia.
J Appl Physiol (1985)
January 2025
Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland, United States.
Acute, intermittent exposure to mild hypoxia increases sympathetic nervous system activity, decreases arterial shear rate, and increases blood pressure (BP) in young men. Given that the BP-raising effects of intermittent hypoxia (IH) are less evident in young women, we sought to examine the influence of sex on macro- and microvascular function following IH. BP, macrovascular function [brachial artery flow-mediated dilation (FMD)], microvascular function [reactive hyperemia area under the curve (RHAUC)], and brachial artery shear rate [shear rate area under the curve (SRAUC)] were measured before and following 30 min of IH in 18 young adults (8 women, 23 ± 5 yr).
View Article and Find Full Text PDFImpact of macrohemodynamic manipulations during cardiopulmonary bypass on finger microcirculation assessed by photoplethysmography signal components.
Physiol Meas
December 2024
Department of Critical Care, University Hospital La Princesa, Autonomous University of Madrid, Madrid, Spain.
Continuous monitoring of the hemodynamic coherence between macro and microcirculation is difficult at the bedside. We tested the role of photoplethysmography (PPG) to real-time assessment of microcirculation during extreme manipulation of macrohemodynamics induced by the cardiopulmonary bypass (CPB).We analyzed the alternating (AC) and direct (DC) components of the finger PPG in 12 patients undergoing cardiac surgery with CPB at five moments: (1) before-CPB; (2) CPB-start, at the transition from pulsatile to non-pulsatile blood flow; (3) CPB-aortic clamping, at a sudden decrease in pump blood flow and volemia.
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