Results 321 to 330 of about 2,128,557 (346)

Electrophysiologic Characteristics of Atria in Patients Without Heart Disease

Pacing and Clinical Electrophysiology, 2005
Background: The significance of atrial fibrillation or tachycardia (AF) induction remains debatable. Some believe that the presence of heart disease (HD) increases the sensitivity and decreases the specificity of programmed atrial stimulation (PAS). There are few data in patients without HD.
B. Popovic, Daniel Beurrier, C. Suty-Selton, Emad Khaldi, H. Belhakem, Pierre Louis, Marius Andronache, Arnaud Terrier De La Chaise, Pierre Houriez, Béatrice Brembilla-Perrot, Marc Nippert, Olivier Claudon, Yves Ernst   +12 more
openaire   +3 more sources

Isolation and characterization of glycosaminoglycans from atria of the human heart

International Journal of Biochemistry, 1981
Abstract 1. 1. Five glycosaminoglycans were isolated from tryptic digest of atria of the human heart and were assayed by determining the carbohydrate content of materials. 2. 2. Separation of these 5 polymers was achieved by Dowex 1 × 2 column chromatography. 3. 3.
Smcmjo Shigeki, Masuda Hiroshi
openaire   +3 more sources

Expression of troponin T in atria and ventricles of avian and mammalian hearts

Journal of Molecular and Cellular Cardiology, 1986
The expression of troponin T in atria and ventricles of adult chicken, rabbit and beef hearts has been studied by two dimensional electrophoresis of soluble extracts from these tissues. The monoclonal antibody, T1/61, has been used to detect the presence of troponin T in the chicken samples.
J.M. Wilkinson, R.D. Taylor
openaire   +3 more sources

Neuronal control of heart rate in isolated mouse atria

American Journal of Physiology-Heart and Circulatory Physiology, 2003
A novel mouse isolated atrial preparation with intact postganglionic autonomic innervation was used to investigate the neuronal control of heart rate. To establish whether autonomic activation was likely to alter heart rate by modulating the hyperpolarization-activated current ( If), the L-type Ca2+current ( ICa,L), or the ACh-activated K+current ( IK ...
Rebecca Feldman, Julia Choate
openaire   +3 more sources

Depolarization of the Rat Atria in Experimental Simulation of the Holiday Heart Syndrome

Doklady Biochemistry and Biophysics, 2020
In the study of the sequence of depolarization of the atrial subepicardium of rats in the short-term alcohol consumption model (the "Holiday heart" syndrome), the localization of the sources of atrial arrhythmias was determined for the first time. The difference in the excitation of the right and left atria was discovered: the right atrium is activated
M B Vititnova, I B Tsorin, S. L. Smirnova, I. M. Roshchevskaya, S. A. Kryzhanovsky, V N Stolyaruk   +5 more
openaire   +3 more sources

Influence of atrial fibrillation on microRNA expression profiles in left and right atria from patients with valvular heart disease.

Physiological Genomics, 2012
Chronic atrial fibrillation (AF) is a complication associated with the dilated atria of patients with valvular heart disease and contributes to worsened pathology. We examined microRNA (miRNA) expression profiles in right and left atrial appendage tissue
Nicola Cooley, M. Cowley, R. Lin, S. Marasco, Chiew Y Wong, D. Kaye, A. Dart, E. Woodcock   +7 more
semanticscholar   +1 more source

Extraneuronal accumulation of isoproterenol in atria and ventricle of perfused rat heart

Life Sciences, 1988
Extraneuronal accumulation of isoproterenol in atria and ventricle of perfused rat heart was investigated. Rat hearts were perfused with various concentrations of 3H-isoproterenol for 30 min in the absence and the presence of catechol-O-methyltransferase (COMT) inhibitor (tropolone).
Yoshinobu Akimoto, Tatsuo Magaribuchi, Motohatsu Fujiwara, Kazuyoshi Kurahashi   +3 more
openaire   +3 more sources

Separation of the Natural Atria in Experimental Implantation of Total Artificial Heart

Artificial Organs, 1995
Abstract: Atrial connections in a single‐unit total artificial heart (TAH) may be difficult to make because of the rigidity of the device and the fixed position of the atrial inlets. We developed a technique to separate the natural atrial borders in an experimental implantation of a unitary TAH.
John M. Fuqua, Steven M. Parnis, Nobuyuki Furusho, Ryousuke Matsuwaka, O.H. Frazier, McGee Mg   +5 more
openaire   +3 more sources

Revisiting heart activation-conduction physiology, part I: atria

Journal of Interventional Cardiac Electrophysiology, 2014
This discussion paper re-examines the conduction-activation of the atria, based on observations, with respect to the complexity of the heart as an organ with a brain, and its evolution from a peristaltic tube. The atria do not require a specialized conduction system because they use the subendocardial layer to produce centripetal transmural activation ...
Gerard M. Guiraudon, Gerard M. Guiraudon, Douglas L. Jones, Douglas L. Jones   +3 more
openaire   +3 more sources

Pre-synaptic NO-cGMP pathway modulates vagal control of heart rate in isolated adult guinea pig atria.

Journal of Molecular and Cellular Cardiology, 2000
The role of nitric oxide (NO) in the vagal modulation of heart rate (HR) is controversial. We tested the hypothesis that NO acts via a pre-synaptic, guanylyl cyclase (GC) dependent pathway.
N. Herring, S. Golding, D. Paterson
semanticscholar   +1 more source