Parasystole

From WikiMD's medical encyclopedia


Parasystole
Synonyms
Pronounce N/A
Specialty Cardiology
Symptoms Arrhythmia, palpitations, dizziness, syncope
Complications Heart failure, stroke
Onset
Duration
Types
Causes Ectopic pacemaker activity
Risks
Diagnosis Electrocardiogram (ECG)
Differential diagnosis Atrial fibrillation, ventricular tachycardia
Prevention
Treatment Antiarrhythmic agents, catheter ablation
Medication Beta blockers, calcium channel blockers
Prognosis
Frequency
Deaths N/A


Parasystole is a type of arrhythmia that is characterized by the presence of one or more subsidiary pacemakers in the heart that function independently of the sinoatrial node, the heart's primary pacemaker. These subsidiary pacemakers generate their own electrical impulses, which can lead to irregular heart rhythms.

Overview

Parasystole is a relatively rare condition, and it can occur in both the atria and the ventricles. The condition is often asymptomatic, but in some cases, it can cause symptoms such as palpitations, dizziness, and syncope.

Causes

The exact cause of parasystole is not known, but it is thought to be related to the presence of abnormal myocardial tissue that can generate its own electrical impulses. This abnormal tissue can be present at birth, or it can develop later in life due to conditions such as coronary artery disease or myocarditis.

Diagnosis

Parasystole can be diagnosed using an electrocardiogram (ECG), which can detect the irregular heart rhythms caused by the condition. Other diagnostic tests may include a Holter monitor, which records the heart's electrical activity over a 24-hour period, and an echocardiogram, which uses ultrasound to create images of the heart.

Treatment

The treatment for parasystole depends on the severity of the condition and the symptoms it causes. In some cases, no treatment may be necessary. If treatment is required, it may include medications to control the heart rate, such as beta blockers or calcium channel blockers. In severe cases, a procedure called catheter ablation may be used to destroy the abnormal tissue causing the irregular heart rhythms.

See also

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Contributors: Prab R. Tumpati, MD