Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Cardiac_action_potential> ?p ?o }
- Cardiac_action_potential abstract "The cardiac action potential is a short-lasting event in which the membrane potential (the difference of potential between the interior and the exterior) of a cardiac cell rises and falls following a consistent trajectory, similar to the action potential in other types of cells.The cardiac action potential differs significantly in different portions of the heart. The heart is provided with a special excitatory system and a contractile system necessary to differentiate action potentials in the heart, which allow it to function at a constant rate.This differentiation of the action potentials allows the different electrical characteristics of the different portions of the heart. For instance, the specialized excitatory system of the heart has the special property of spontaneous depolarization. This means the heart depolarizes without any external influence via a slow, positive increase in voltage known as the pacemaker potential across the cell's membrane (the membrane potential) that occurs between the end of one action potential and the beginning of the next action potential. This increase in membrane potential (depolarization) typically allows it to reach the threshold potential at which the next pacemaker potential is fired. Thus, it is the pacemaker potential that drives the self-generated rhythmic firing, known as cardiac muscle automaticity or autorhythmicity.Pacemaker potentials are fired by sinoatrial node (SAN), but also by the other foci. However, the last ones have firing frequencies slower than the SAN's. When other foci attempt to fire at their intrinsic rate, they can not, because they have been discharged by the previous electric impulse coming from the SAN before their pacemaker potential threshold is reached. This is called "overdrive suppression". Under certain conditions (if pacemaker cells become compromised) non-pacemaker cells can take over and set the pace of the heart (become pacemakers). Rate dependence of action potential is a fundamental property of cardiac cells. This is important for the QT interval, measured from the beginning of the QRS complex to the end of the T wave. This interval must be corrected for the cardiac rhythm QTc. A prolonged QTc, long QT syndrome, induced by drugs or disease congenital or acquired, increases the possibility of developing severe ventricular arrhythmias and sometimes sudden death.The electrical activity of the specialized excitatory tissues is not apparent on the surface electrocardiogram (ECG). This is due to the relatively small time duration. It is not possible, for example, to see on the ECG the sinus node activity, but the resulting atrial myocardium contraction is apparent as a wave – the P wave. The electrical activity of the conducting system can be seen on the ECG (for example the AV node delay and the so-called PR segment).".
- Cardiac_action_potential thumbnail Action_potential_ventr_myocyte.gif?width=300.
- Cardiac_action_potential wikiPageExternalLink APindex.html.
- Cardiac_action_potential wikiPageExternalLink CAPindex.html.
- Cardiac_action_potential wikiPageID "857170".
- Cardiac_action_potential wikiPageLength "41547".
- Cardiac_action_potential wikiPageOutDegree "126".
- Cardiac_action_potential wikiPageRevisionID "675110368".
- Cardiac_action_potential wikiPageWikiLink Action_potential.
- Cardiac_action_potential wikiPageWikiLink All-or-none_law.
- Cardiac_action_potential wikiPageWikiLink Anion.
- Cardiac_action_potential wikiPageWikiLink Antiarrhythmic_agent.
- Cardiac_action_potential wikiPageWikiLink Antiarrhythmic_agents.
- Cardiac_action_potential wikiPageWikiLink Athletic_heart_syndrome.
- Cardiac_action_potential wikiPageWikiLink Autonomic_nervous_system.
- Cardiac_action_potential wikiPageWikiLink Beta-1_adrenergic_receptor.
- Cardiac_action_potential wikiPageWikiLink CACNA1C.
- Cardiac_action_potential wikiPageWikiLink Calcium.
- Cardiac_action_potential wikiPageWikiLink Calcium-induced_calcium_release.
- Cardiac_action_potential wikiPageWikiLink Calcium_ATPase.
- Cardiac_action_potential wikiPageWikiLink Cardiac_action_potential.
- Cardiac_action_potential wikiPageWikiLink Cardiac_arrhythmia.
- Cardiac_action_potential wikiPageWikiLink Cardiac_dysrhythmia.
- Cardiac_action_potential wikiPageWikiLink Cardiac_muscle.
- Cardiac_action_potential wikiPageWikiLink Cardiac_muscle_automaticity.
- Cardiac_action_potential wikiPageWikiLink Cardiac_muscle_cell.
- Cardiac_action_potential wikiPageWikiLink Cardiac_myocyte.
- Cardiac_action_potential wikiPageWikiLink Cardiac_pacemaker.
- Cardiac_action_potential wikiPageWikiLink Cardiac_transient_outward_potassium_current.
- Cardiac_action_potential wikiPageWikiLink Category:Cardiac_electrophysiology.
- Cardiac_action_potential wikiPageWikiLink Cation.
- Cardiac_action_potential wikiPageWikiLink Cav1.2.
- Cardiac_action_potential wikiPageWikiLink Cengage_Learning.
- Cardiac_action_potential wikiPageWikiLink Chloride.
- Cardiac_action_potential wikiPageWikiLink Conjugate_acid.
- Cardiac_action_potential wikiPageWikiLink Cyclic_nucleotide.
- Cardiac_action_potential wikiPageWikiLink Depolarization.
- Cardiac_action_potential wikiPageWikiLink Diastole.
- Cardiac_action_potential wikiPageWikiLink Diastolic_depolarization.
- Cardiac_action_potential wikiPageWikiLink Electric_current.
- Cardiac_action_potential wikiPageWikiLink Electrical_conduction_system_of_the_heart.
- Cardiac_action_potential wikiPageWikiLink Electrocardiogram.
- Cardiac_action_potential wikiPageWikiLink Electrocardiography.
- Cardiac_action_potential wikiPageWikiLink Endoplasmic_reticulum.
- Cardiac_action_potential wikiPageWikiLink Equilibrium_potential.
- Cardiac_action_potential wikiPageWikiLink Excitation–contraction_coupling.
- Cardiac_action_potential wikiPageWikiLink Funny_current.
- Cardiac_action_potential wikiPageWikiLink G_protein-coupled_receptor.
- Cardiac_action_potential wikiPageWikiLink G_protein–coupled_receptor.
- Cardiac_action_potential wikiPageWikiLink Gap_junction.
- Cardiac_action_potential wikiPageWikiLink Gap_junctions.
- Cardiac_action_potential wikiPageWikiLink Gene.
- Cardiac_action_potential wikiPageWikiLink Goldman_equation.
- Cardiac_action_potential wikiPageWikiLink HERG.
- Cardiac_action_potential wikiPageWikiLink Heart.
- Cardiac_action_potential wikiPageWikiLink Hyperpolarization_(biology).
- Cardiac_action_potential wikiPageWikiLink Inward-rectifier_potassium_ion_channel.
- Cardiac_action_potential wikiPageWikiLink Ion.
- Cardiac_action_potential wikiPageWikiLink Ion_channel.
- Cardiac_action_potential wikiPageWikiLink KCND2.
- Cardiac_action_potential wikiPageWikiLink KCND3.
- Cardiac_action_potential wikiPageWikiLink KCNH2.
- Cardiac_action_potential wikiPageWikiLink KCNJ12.
- Cardiac_action_potential wikiPageWikiLink KCNJ2.
- Cardiac_action_potential wikiPageWikiLink KCNJ4.
- Cardiac_action_potential wikiPageWikiLink KCNQ1.
- Cardiac_action_potential wikiPageWikiLink K_channel.
- Cardiac_action_potential wikiPageWikiLink Kir2.1.
- Cardiac_action_potential wikiPageWikiLink KvLQT1.
- Cardiac_action_potential wikiPageWikiLink L-type_calcium_channel.
- Cardiac_action_potential wikiPageWikiLink Ligand.
- Cardiac_action_potential wikiPageWikiLink Ligand-gated_channel.
- Cardiac_action_potential wikiPageWikiLink Ligand-gated_ion_channel.
- Cardiac_action_potential wikiPageWikiLink Lippincott_Williams_&_Wilkins.
- Cardiac_action_potential wikiPageWikiLink Litre.
- Cardiac_action_potential wikiPageWikiLink Long_QT_syndrome.
- Cardiac_action_potential wikiPageWikiLink Membrane_potential.
- Cardiac_action_potential wikiPageWikiLink Molecular_biology.
- Cardiac_action_potential wikiPageWikiLink Muscarinic_acetylcholine_receptor_M2.
- Cardiac_action_potential wikiPageWikiLink Muscarinic_acetylcholine_receptor_m2.
- Cardiac_action_potential wikiPageWikiLink Muscle_contraction.
- Cardiac_action_potential wikiPageWikiLink Myocyte.
- Cardiac_action_potential wikiPageWikiLink K+-ATPase.
- Cardiac_action_potential wikiPageWikiLink Na-K_pump.
- Cardiac_action_potential wikiPageWikiLink NaKATPase.
- Cardiac_action_potential wikiPageWikiLink Nav1.5.
- Cardiac_action_potential wikiPageWikiLink Organic_acid.
- Cardiac_action_potential wikiPageWikiLink Pacemaker_potential.
- Cardiac_action_potential wikiPageWikiLink Phosphate.
- Cardiac_action_potential wikiPageWikiLink Potassium.
- Cardiac_action_potential wikiPageWikiLink Potassium_channel.
- Cardiac_action_potential wikiPageWikiLink Potassium_channels.
- Cardiac_action_potential wikiPageWikiLink QT_interval.
- Cardiac_action_potential wikiPageWikiLink Refractory_period_(cardiac).
- Cardiac_action_potential wikiPageWikiLink Refractory_period_(physiology).
- Cardiac_action_potential wikiPageWikiLink Repolarization.
- Cardiac_action_potential wikiPageWikiLink Resting_membrane_potential.
- Cardiac_action_potential wikiPageWikiLink Resting_potential.
- Cardiac_action_potential wikiPageWikiLink Reversal_potential.
- Cardiac_action_potential wikiPageWikiLink SCN5A.