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Home > Introduction > Cardiac Electrophysiology

Cardiac Electrophysiology and ECG Interpretation

The electrocardiogram (ECG) is a fundamental diagnostic tool in cardiology that records the electrical activity of the heart.

The Electrical Conduction System

The heart's electrical system consists of specialized cells that generate and conduct electrical impulses. The sinoatrial (SA) node, located in the right atrium, acts as the heart's natural pacemaker...

Key Components

  • SA Node: Primary pacemaker (60-100 bpm)
  • AV Node: Delays impulse before ventricular activation
  • Bundle of His: Connects AV node to bundle branches
  • Purkinje Fibers: Rapidly distribute impulses throughout ventricles
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Home > Introduction > Action Potential

Action Potential and Automaticity

Cardiac action potentials are the electrical signals that trigger heart muscle contraction...

Phases of Cardiac Action Potential

The cardiac action potential consists of five distinct phases (0-4), each characterized by specific ion movements...

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Home > Arrhythmias > Mechanisms

Arrhythmia Mechanisms

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