Results 31 to 40 of about 57,164 (287)

Modulation of Transmural Repolarization [PDF]

Annals of the New York Academy of Sciences, 2005
Abstract: Ventricular myocardium in larger mammals has been shown to be comprised of three distinct cell types: epicardial, M, and endocardial. Epicardial and M cell action potentials differ from endocardial cells with respect to the morphology of phase 1.
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Is myocardial repolarization duration associated with repolarization heterogeneity? [PDF]

Annals of Noninvasive Electrocardiology, 2017
BackgroundDispersion of repolarization is theorized as one mechanism by which myocardial repolarization prolongation causes lethal torsades de pointes, (TdP). Our primary purpose was to determine whether prolongation of myocardial repolarization as measured by the heart rate‐corrected J‐to‐T peak interval (JTpkc), is associated with repolarization ...
Keith A. Marill, Pat Dorsey, Anthony Holmes, Ketaki Muthal, Emily S. Miller, Joel Xue   +5 more
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Repolarization Reserve [PDF]

Circulation, 2008
A drug dose (and con-centration) that produces minimal QT prolongation in onepatient may, in an apparently indistinguishable subject, pro-duce marked QT prolongation and torsade de pointes. Thisvariability in response to an exogenous stressor is paralleledby variability in the extent to which a given mutation in thecongenital long-QT syndrome prolongs ...
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Role of the Purkinje-Muscle Junction on the Ventricular Repolarization Heterogeneity in the Healthy and Ischemic Ovine Ventricular Myocardium

Frontiers in Physiology, 2018
Alteration of action potential duration (APD) heterogeneity contributes to arrhythmogenesis. Purkinje-muscle junctions (PMJs) present differential electrophysiological properties including longer APD.
Marine E. Martinez, Marine E. Martinez, Marine E. Martinez, Richard D. Walton, Richard D. Walton, Richard D. Walton, Jason D. Bayer, Jason D. Bayer, Michel Haïssaguerre, Michel Haïssaguerre, Michel Haïssaguerre, Michel Haïssaguerre, Edward J. Vigmond, Edward J. Vigmond, Mélèze Hocini, Mélèze Hocini, Mélèze Hocini, Mélèze Hocini, Olivier Bernus, Olivier Bernus, Olivier Bernus   +20 more
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Depolarization and repolarization dynamics after His‐bundle pacing: Comparison with right ventricular pacing and native ventricular conduction

Annals of Noninvasive Electrocardiology, 2022
Background The current study aimed to evaluate changes in electrical depolarization and repolarization parameters after His‐bundle pacing (HBP) compared with right ventricular pacing (RVP) and its association with ventricular arrhythmia (VA).
Satoshi Yanagisawa, Yasuya Inden, Ryo Watanabe, Naoki Tsurumi, Noriyuki Suzuki, Toshifumi Nakagomi, Masafumi Shimojo, Takashi Okajima, Shuro Riku, Koichi Furui, Kazumasa Suga, Rei Shibata, Toyoaki Murohara   +12 more
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Early Repolarization in the Athlete

Journal of the American College of Cardiology, 2009
An “abnormal” resting electrocardiogram is common in top-ranking, endurance-trained athletes ([1][1]). These abnormalities belong to physiological changes induced by training, as sinus bradycardia, high QRS and T-wave voltages, and early repolarization (ER), consisting of an elevation of QRS–
Bianco, Massimiliano, Zeppilli, Paolo
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Temporal variability of T‐wave morphology and risk of sudden cardiac death in patients with coronary artery disease

Annals of Noninvasive Electrocardiology, 2021
Background The possible relationship between temporal variability of electrocardiographic spatial heterogeneity of repolarization and the risk of sudden cardiac death (SCD) in patients with coronary artery disease (CAD) is not completely understood ...
Janne T. Rahola, Antti M. Kiviniemi, Olavi H. Ukkola, Mikko P. Tulppo, M. Juhani Junttila, Heikki V. Huikuri, Tuomas V. Kenttä, Juha S. Perkiömäki   +7 more
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Early screening of hypertension and cardiac dysautonomia in each hypertensive is needed-inference from a study of QTc interval in Gujarat, India

International Journal of Preventive Medicine, 2018
Background: Hypertension (HTN) is linked to cardiac dysautonomia that can end up as life-threatening arrhythmias. The same can be screened by simple electrocardiogram (ECG)-based QTc (QT corrected for heart rate) interval which indicates repolarization ...
Jayesh Dalpatbhai Solanki, Bhakti P Gadhavi, Amit H Makwana, Hemant B Mehta, Chinmay J Shah, Pradnya A Gokhale   +5 more
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Temporal Variability in Electrocardiographic Indices in Subjects With Brugada Patterns

Frontiers in Physiology, 2020
IntroductionPatients with Brugada electrocardiographic (ECG) patterns have differing levels of arrhythmic risk. We hypothesized that temporal variations in certain ECG markers may provide additional value for risk stratification.
Sharen Lee, Jiandong Zhou, Tong Liu, Konstantinos P. Letsas, Sandeep S. Hothi, Vassilios S. Vassiliou, Guoliang Li, Adrian Baranchuk, Raymond W. Sy, Raymond W. Sy, Dong Chang, Qingpeng Zhang, Gary Tse, Gary Tse   +13 more
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Polarization and Repolarization of Macrophages

Journal of Clinical and Cellular Immunology, 2015
Macrophages can acquire distinct phenotypes and biological functions depending on the microenvironment and the metabolic state. Macrophages classically activated by IFN-γ and/or microbial products display an M1 phenotype characterized by high expression of interleukin (IL)-12, inducible nitric oxide synthase (iNOS) and TNF-α.
FRATERNALE, ALESSANDRA, BRUNDU, SERENA, MAGNANI, MAURO   +2 more
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