Author: Publisher:
ISBN:
Category : Cardiology
Languages : en
Pages : 498
Book Description
Memorias del IV Congreso Mundial de Cardiología
Author: Memorias del IV Congreso Mundial de Cardiología, Mexico, Octubre 1962
Author: Memorias Del IV Congreso Mundial de Cardiologia
Author: Proceedings of the International Symposium on Acclimatization, Adaptation, and Tolerance to High Altitude
Author: Futuras conferencias y reuniones inter-americanas
Author: Pan American Union. Division of Conference and Organization ServicesPublisher:
ISBN:
Category :
Languages : en
Pages : 628
Book Description
Futuras conferencias y reuniones interamericanas
Author: Pan American Union. Division of Conferences and OrganizationsPublisher:
ISBN:
Category :
Languages : en
Pages : 80
Book Description
Festschrift
Author: Universidad Nacional Autónoma de MéxicoPublisher: UNAM
ISBN: 9789683610232
Category : Ethnology
Languages : en
Pages : 586
Book Description
National Library of Medicine Current Catalog
Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1972
Book Description
Cardiac Rate and Rhythm
Author: L.N. BoumanPublisher: Springer Science & Business Media
ISBN: 940097535X
Category : Medical
Languages : en
Pages : 675
Book Description
In the denervated state the mammalian heart, both in vivo and in vitro, is excited at very regular intervals, the coefficient of variance of the interbeat intervals not exceeding 2%. The pacemaker that is the source of this regular ex citation is localised normally within the sinus node (" sino-atrial node " node of Keith and Flack), a most intriguing small piece of tissue in the caval corner of the right atrium. A small portion of this node containing a group of probably only a few thousands of cells fires spontaneously, that means without any exter nal influence to trigger their activity. The so called pacemaker cells do this by letting their membrane potential fall to the level where an action potential will start which subsequently activates surrounding cells to fire an action po tential. The first question which is tackled in this book is which processes underly this spontaneous diastolic depolarization. This is discussed in section I, concerning the fundamental properties of pacemaker cells with special refer ence to ionic membrane currents. Although views still quite differ about the exact nature of the membrane processes that cause the automatic pacemaker dis charge there is agreement that diastolic depolarization is brought about by the interaction of a number of ionic current systems, including both inward and out ward going currents.
Author: