心血管系统｜心脏电生理 Cardiac Electrophysiology - 知乎
2 cell types. Working cell ️ pump function. Atrial & Ventricular muscle: stable resting membrane potential. Autorhythmic cell ️ rhythm. Sinoatrial node: unstable resting membrane potential ️ automaticity. 2 types of velocity of depolarization. Fast response cell. Fast depolarization & High amplitude of AP. Atria, Ventricle, Purkinje fiber
2024年12月4日 · learning basic cardiac electrophysiology in normal and isch-emic hearts. The first section examines the ionic basis for resting membrane potentials and cardiac action potentials, with a focus on nonpacemaker cells. Foundational concepts such as ion equilibrium potentials, electrochemical forces driving ion
Electrophysiology | ECG Core Curriculum - McGraw Hill Medical
There are four inherent electrical properties of cardiac cells: (1) automaticity, (2) excitability, (3) conductivity, and (4) refractoriness. All have important implications with regard to the generation of normal and abnormal cardiac rhythms and each property can vary in health and disease.
Cardiac electrical activity is determined by transmembrane potential - the potential, or voltage, difference between the intracellular and extracellular environments. This potential difference can only exist because of the selectively-permeable cardiac cell membrane.
Basic Cardiac Electrophysiology: Excitable Membranes
2 天之前 · Cardiomyocytes are the main cell type of the heart. Their electrical activity is fundamentally a biological process determined by the transmembrane potential, a voltage difference between the intracellular and extracellular compartments. During a normal cardiac cycle, mechanical contraction always follows electrical excitation.
Cardiac electrophysiology: normal and ischemic ionic currents …
2017年1月31日 · Basic cardiac electrophysiology is foundational to understanding normal cardiac function in terms of rate and rhythm and initiation of cardiac muscle contraction.
Electrophysiology of Single Cardiomyocytes: Patch Clamp and …
2 天之前 · The heart is composed of excitable myocytes and nonexcitable cells. The excitable cells are responsible... To effectively pump blood throughout the body, each individual myocyte in the heart must be electrically coordinated with other myocytes during a cardiac cycle.
Cardiac Electrophysiology - SpringerLink
2019年11月12日 · This chapter focuses on the normal electrophysiological and cellular contraction processes of cardiac electrophysiology from the molecular level, up to the tissue adaptations of the human heart. Later in the chapter, clinically relevant topics such as the electrocardiogram, pacemaker therapy and basic electrophysiological interventions are also ...
cardiac_physiology_electrophysiology [TUSOM | Pharmwiki]
2024年9月19日 · Describe the sequence of events that produces the normal pattern of excitation and contraction of the heart (the normal sinus rhythm). Describe the major components (waves and intervals) of the surface electrocardiogram (lead I), and how they correspond to the spread of depolarization and repolarization in different regions of the heart.
Cardiac electrophysiology: normal and ischemic ionic currents …
2017年3月1日 · Basic cardiac electrophysiology is foundational to understanding normal cardiac function in terms of rate and rhythm and initiation of cardiac muscle contraction. The primary clinical tool for assessing cardiac electrical events is the electrocardiogram (ECG), which provides global and regional info …