Background: As living standards improve, more and more people are becoming overweight or obese, which has led to a gradual increase in the incidence of gastroesophageal reflux disease (GERD). Esophageal multichannel intraluminal impedance pH monitoring is a technique widely used in the clinical diagnosis of GERD. Commonly used traditional impedance parameters include acid exposure time, number of reflux episodes, symptom association probability, and symptom index. Recently, mean nocturnal baseline impedance (MNBI) and post-reflux swallow-induced peristaltic wave (PSPW) index have been proposed as novel impedance parameters to evaluate esophageal mucosal integrity and esophageal chemical clearance, respectively. It was also pointed out that the MNBI and PSPW index can improve the diagnostic value of impedance pH monitoring and predict the treatment outcome of GERD.
Summary: MNBI and PSPW index are objective and reliable novel impedance parameters with high applicability and reproducibility, which are able to improve the diagnostic yield of impedance pH monitoring and predict treatment outcomes in GERD patients.
Key Messages: In this paper, we mainly review the research progress of the MNBI and the PSPW index in the diagnosis and treatment of GERD.
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http://dx.doi.org/10.1159/000527867 | DOI Listing |
Pacing Clin Electrophysiol
January 2025
Department of Cardiology, Saitama Medical University, International Medical Center, Hidaka, Saitama, Japan.
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ACS Omega
January 2025
Department of Biomedical Engineering, Hanyang University, Seoul 04763, Republic of Korea.
Fast-scan cyclic voltammetry (FSCV) is a widely used electrochemical technique to measure the phasic response of neurotransmitters in the brain. It has the advantage of reducing tissue damage to the brain due to the use of carbon fiber microelectrodes as well as having a high temporal resolution (10 Hz) sufficient to monitor neurotransmitter release in vivo. During the FSCV experiment, the surface of the carbon fiber microelectrode is inevitably changed by the fouling effect.
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January 2025
Micropropulsion and Nanotechnology Laboratory, School of Engineering and Applied Science, George Washington University, Washington, DC, USA.
Cancer remains a formidable global health challenge, necessitating the development of innovative diagnostic techniques capable of early detection and differentiation of tumor/cancerous cells from their healthy counterparts. This review focuses on the confluence of advanced computational algorithms with noninvasive, label-free impedance-based biophysical methodologies-techniques that assess biological processes directly without the need for external markers or dyes. This review elucidates a diverse array of state-of-the-art impedance-based technologies, illuminating distinct electrical signatures inherent to cancer vs healthy tissues.
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January 2025
Department of Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation and Tzu Chi University, Hualien, Taiwan; Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan. Electronic address:
Background: Patients with typical reflux symptoms and normal acid exposure time (AET) are classified as either reflux hypersensitivity (RH) or functional heartburn (FH), some of whom respond to proton pump inhibitors (PPIs). We determined if esophageal psychophysiological parameters predict PPI response in symptomatic RH and FH patients.
Methods: We prospectively recruited adults with heartburn diagnosed with RH or FH on 24-h impedance-pH monitoring off PPI.
Heart Rhythm
January 2025
Division of Cardiology, Department of Medicine, Nihon University School of Medicine Tokyo Japan. Electronic address:
Background: Pulsed field ablation (PFA) for paroxysmal atrial fibrillation (AF) has been gaining worldwide acceptance due to its efficacy and safety. A variable loop circular catheter (VLCC, VARIPULSE, Biosense Webster, Inc.) for PFA, recently launched in Japan, includes a Tissue Proximity Indication (TPI) feature to monitor catheter-tissue contact via impedance.
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