Results 251 to 260 of about 1,438,452 (291)

Immunolocalization of ornithine decarboxylase in rat heart atria

Journal of Molecular and Cellular Cardiology, 1989
Mammalian atrial myocytes secrete a potent natriuretic and diuretic factor, atrial natriuretic peptide (ANP), in response to volume expansion or elevations of right atrial pressure. ANP is synthesized in the atrial atrial myocytes and stored in cytoplasmic secretory granules.
U R, Tipnis, A L, Steiner, C, Skiera, M K, Haddox   +3 more
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Specialized tissues and preferential conduction in the atria of the heart

The American Journal of Cardiology, 1971
Abstract Many of the widely prevalent concepts in clinical electrocardiography are based on the premise that the spread of electrical activity in the atria is radial, not following special pathways. This review questions that premise on the grounds of recent electrophysiologic, biochemical and anatomic studies that are more logically interpreted as ...
T N, James, L, Sherf
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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.
Béatrice, Brembilla-Perrot, Daniel, Beurrier, Pierre, Houriez, Christine, Suty-Selton, Marc, Nippert, Olivier, Claudon, Marius, Andronache, Yves, Ernst, Emad, Khaldi, Hadj, Belhakem, Batric, Popovic, Arnaud, Terrier de la Chaise, Pierre, Louis   +12 more
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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.
H, Masuda, S, Shichijo
openaire   +2 more sources

Characterization of natriuretic peptide production by adult heart atria

American Journal of Physiology-Heart and Circulatory Physiology, 1999
The cardiac polypeptide hormones atrial natriuretic factor (ANF) and brain natriuretic peptide (BNP) are synthesized and costored by atrial cardiocytes and share receptors and many biologic properties. Although some aspects of their synthesis and release are specific for each peptide, it is not clear whether they share intracellular sorting and ...
T, Ogawa, M, Vatta, B G, Bruneau, A J, de Bold   +3 more
openaire   +2 more sources

Morphology of the specialized conducting tissue in the atria of the equine heart

The Anatomical Record, 1967
AbstractThe gross and microscopic anatomy of the sinus node (SN), atrioventricular node (AVN) and specialized fibers in the atrium were studied in 19 horses and eight mules. The SN is supplied with blood by a branch from the left circumflex artery which subdivides within the node.
S P, Bishop, C R, Cole
openaire   +2 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.
O H, Frazier, R, Matsuwaka, S M, Parnis, N, Furusho, M G, McGee, J M, Fuqua   +5 more
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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).
T, Magaribuchi, K, Kurahashi, Y, Akimoto, M, Fujiwara   +3 more
openaire   +2 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, Douglas L, Jones
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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   +2 more sources