Disease That Affects the Heart's Electrical System and Lining

Types of Heart Disease in the Electrical System

Heart disease types that affect the electrical system are known as arrhythmias. They can cause the heart to beat too fast (tachycardia), too slow (bradycardia), or irregularly. These kinds of heart disease include:
  • Sinus tachycardia
  • Sinus bradycardia
  • Atrial fibrillation
  • Heart block, including first-degree AV block, second-degree AV block, and complete AV block (third-degree heart block)
  • Bundle branch block, including left bundle branch block and right bundle branch block
  • Premature atrial contractions (PAC), also known as premature atrial complexes
  • Atrial flutter
  • Supraventricular tachycardia (SVT), also known as atrial tachycardia
  • Multifocal atrial tachycardia
  • Paroxysmal supraventricular tachycardia (PSVT), also known as paroxysmal atrial tachycardia
  • Wolff-Parkinson-White syndrome (WPW)
  • Premature ventricular contractions (PVC), also known as premature ventricular complexes
  • Ventricular tachycardia
  • Ventricular fibrillation
  • Long QT syndrome
  • Brugada syndrome, also known as sudden unexplained nocturnal death syndrome (SUNDS).

Heart Diseases That Affect the Lining

Cells that line the inside of the heart muscle and valves are known as the endocardium. The outside of the heart is surrounded by a thin sac known as the pericardium. Types of heart disease that can affect either the endocardium or pericardium include:
  • Endocarditis, which is an inflammation of the endocardium. The heart valves are most commonly affected by this type of heart disease.
  • Pericarditis (inflammation of the pericardium), including constrictive pericarditis.
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