Heart Arrhythmia

An irregular heartbeat or abnormal cardiac rhythm is referred to as heart arrhythmia, or simply arrhythmia. To effectively pump blood throughout the body, the heart normally beats in a regular, coordinated manner. The sinoatrial (SA) node, the heart's natural pacemaker, generates electrical signals that pass through the electrical conduction system of the heart to regulate this rhythmic beating.

These electrical signals may be disrupted with in the case of arrhythmia, resulting in a number of irregular cardiac rhythms.

Arrhythmias can be divided into several categories, including:

  • Bradycardia: Bradycardia is characterized by a slower-than-normal heart rate, usually less than 60 beats per minute (bpm). Delays in the electrical signals between the atria and ventricles can be caused by problems with either the SA node or the atrioventricular (AV) node.
  • Tachycardia: This happens when the heart beats faster than usual, typically more than 100 beats per minute. A variety of reasons can result in tachycardias, which can start in the atria (atrial tachycardia) or ventricles (ventricular tachycardia).
  • Atrial Fibrillation (AFib): A frequent form of arrhythmia known as AFib causes the atria to quiver or fibrillate instead of contracting properly. An irregular and frequently fast heartbeat might result from this.
  • Atrial Flutter: Atrial flutter, like AFib, is characterized by fast contractions of the atria, but they take place in a more structured, regular pattern.
  • Ventricular Fibrillation (VFib): VFib is a life-threatening arrhythmia where the ventricles quiver instead of pumping blood. It may cause cardiac arrest, requiring immediate medical intervention.
  • Premature Contractions: These are extra, irregular heartbeats that might start in the atria (premature atrial contractions) or ventricles (premature ventricular contractions).

Subtopics

Sinus node: Normal and Abnormal Rhythms | Bradyarrhythmias | Ectopic Complexes and Rhythms | Tachycardia | Supraventricular Tachyarrhythmias | Ventricular Tachyarrhythmias | Cardiac Pacing and Pacemaker Rhythms | Implantable Cardioverter Defibrillators | Athletes and Arrhythmias | Drug Effects and Electrolyte Disorders | Treatment of Arrhythmias | Management of Arrhythmias in Pregnancy

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