Nature Communications, 2020 It is highly debated how cyclic adenosine monophosphate-dependent regulation (CDR) of the major pacemaker channel HCN4 in the sinoatrial node (SAN) is involved in heart rate regulation by the autonomic nervous system.
S. Fenske +20 more
semanticscholar +1 more source
Are physiological oscillations physiological?
The Journal of Physiology, EarlyView., 2023 Abstract figure legend Mechanisms and functions of physiological oscillations. Abstract Despite widespread and striking examples of physiological oscillations, their functional role is often unclear. Even glycolysis, the paradigm example of oscillatory biochemistry, has seen questions about its oscillatory function.
Lingyun (Ivy) Xiong, Alan Garfinkel
wiley +1 more source
Sinus automaticity and sinoatrial conduction in severe symptomatic sick sinus syndrome [PDF]
, 1992 Electrophysiologic studies with recordings of sinus node electrograms were performed in 38 patients with severe symptomatic sick sinus syndrome. Thirty-two of the 38 patients had episodic tachyarrhythmias and 17 presented with syncope.
Cherng, Wen-Jin +4 more
core +1 more source
Electron-conformational transformations in nanoscopic RyR channels govern both the heart's contraction and beating [PDF]
, 2011 We show that a simple biophysically based electron-conformational model of RyR channel is able to explain and describe on equal footing the oscillatory regime of the heart's cell release unit both in sinoatrial node (pacemaker) cells under normal ...
Markhasin, V. S. +3 more
core +3 more sources
SCN5A and sinoatrial node pacemaker function [PDF]
Cardiovascular Research, 2007 The SCN5A gene encodes specific voltage-dependent Na+ channels abundant in cardiac muscle that open and close at specific stages of cardiac activity in response to voltage change, thereby controlling the magnitude and timecourse of voltage-dependent Na+ currents (iNa) in cardiac muscle cells.
Lei, Ming +3 more
openaire +3 more sources
Tbx18 and the generation of a biological pacemaker. Are we there yet? [PDF]
, 2016 A group of approximately 10,000 cells in the sinoatrial node (SAN), which is located at the entry of the right superior caval vein into the right atrium, is responsible for regular heart beating under different physiological conditions [1]. While the SAN
Brand, T
core +1 more source
Histopathological changes in the electrical conduction of cardiac nodes after acute myocardial infarction in dogs and horses, compared with findings in humans: A histological, morphometrical, and immunohistochemical study [PDF]
Veterinary World, 2023 Background and Aim: The heart conduction system is responsible for the occurrence of various types of cardiac arrhythmia. This study aimed to histologically and morphometrically describe damaged cardiac nodes during acute myocardial infarction and to ...
Fabián Gómez-Torres +2 more
doaj +1 more source
Complete atrial-specific knockout of sodium-calcium exchange eliminates sinoatrial node pacemaker activity. [PDF]
, 2013 The origin of sinoatrial node (SAN) pacemaker activity in the heart is controversial. The leading candidates are diastolic depolarization by "funny" current (If) through HCN4 channels (the "Membrane Clock" hypothesis), depolarization by cardiac Na-Ca ...
Alber, Sarah +13 more
core +2 more sources
The mind body problem, part three: ascension of sexual function to cerebral level [PDF]
, 2016 Physiologically, the somatic nervous system intervenes in external interaction between the body and environment, while autonomic nervous system ensures the functioning of internal organs.
Motofei, Ion G., Rowland, David L.
core +3 more sources
Impact of functional studies on exome sequence variant interpretation in early-onset cardiac conduction system diseases [PDF]
, 2020 Aims The genetic cause of cardiac conduction system disease (CCSD) has not been fully elucidated. Whole-exome sequencing (WES) can detect various genetic variants; however, the identification of pathogenic variants remains a challenge.
Asano, Yoshihiro +44 more
core +1 more source