Arrhythmia is what?

Written by Chen Tian Hua
Cardiology
Updated on September 15, 2024
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Arrhythmia refers to abnormalities in the frequency, rhythm, origin, or conduction of the heartbeats. It can occur in healthy individuals as well as those with related diseases, and may involve cardiac diseases or other medical conditions.

The primary mechanism behind the occurrence of arrhythmias is the abnormal formation of cardiac impulses or the abnormal conduction of these impulses. It is important to actively seek the causes of arrhythmias and control the factors that trigger them. For diseases associated with arrhythmias, proactive management is necessary. When severe arrhythmias occur, timely and effective treatment is crucial to prevent adverse outcomes.

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What is ventricular arrhythmia?

Ventricular arrhythmias mainly refer to disorders of the ventricular rhythm and are relatively common clinically, including premature ventricular contractions, ventricular tachycardia, ventricular flutter, and ventricular fibrillation. Premature ventricular contractions generally do not cause noticeable clinical symptoms, while ventricular flutter and ventricular fibrillation are very dangerous clinically and must be treated promptly with defibrillation. Therefore, ventricular arrhythmias must be treated promptly, actively treating the underlying disease, and managing the arrhythmia to prevent sudden death.

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What medicine is used for arrhythmia?

There is still no consensus on the drugs commonly used for arrhythmia. The main classes used clinically are as follows: The first class is sodium channel blockers, which include three subclasses: moderate, mild, and significant sodium channel blockers, respectively comprising quinidine, lidocaine, and propafenone. The second class mainly consists of adrenergic receptor blockers, with propranolol being a representative drug. The third class of drugs selectively prolongs the repolarization process, among which amiodarone is commonly used clinically. The fourth class is calcium channel blockers, which mainly block calcium channels and inhibit the inflow of calcium, with verapamil being the main representative drug. Long-term use of anti-arrhythmia drugs can cause varying degrees of side effects, with severe cases possibly leading to ventricular arrhythmia or fatal cardiac conduction block. Therefore, when using these drugs clinically, it is essential to strictly control the indications, monitor adverse reactions, and strictly follow the doctor's prescription for rational medication.

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Symptoms of Sinus Arrhythmia

Symptoms of sinus arrhythmia vary according to different causes, including sinus bradycardia, sinus tachycardia, sinus arrhythmia, sinus arrest, and sick sinus syndrome. Mild cases of sinus bradycardia, sinus tachycardia, and arrhythmia generally do not present noticeable clinical symptoms. However, severe cases can experience symptoms such as palpitations, fatigue, and shortness of breath. Sinus arrest and sick sinus syndrome often present more severe clinical symptoms, including not only shortness of breath but also dizziness, blackouts, fainting, and acute cerebral ischemia and hypoxia.

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Why does arrhythmia cause chest pain?

The causes of chest pain due to arrhythmias primarily involve all kinds of arrhythmias reducing the blood flow in the coronary arteries. Although various arrhythmias can decrease coronary blood flow, they rarely cause myocardial ischemia. However, severe arrhythmias that cause significant myocardial ischemia can result in chest pain. For patients with coronary heart disease, various arrhythmias can induce or exacerbate myocardial ischemia, which may also manifest as chest pain and shortness of breath, and in severe cases, lead to acute heart failure, acute myocardial infarction, and persistent, unbearable chest pain and tightness.

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How to relieve arrhythmia

The relief of arrhythmia mainly involves removing any triggers if they exist, as well as using non-pharmacological methods, including ocular compression, carotid sinus massage, pinching the nose and forcefully exhaling, and breath-holding, which are methods to reflexively stimulate the vagus nerve. If relief is unachievable and the episodes are accompanied by hypotension, fainting or near-fainting, seizures, angina, or heart failure, it is crucial to seek medical attention promptly for pharmacological interventions against arrhythmias, or even consider electrical treatments such as cardioversion, defibrillation, pacemaker implantation, and ablation, as well as surgical options.