Types of heart disease 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 types of heart disease include:
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).
Types of Heart Disease That Affect the Heart 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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