Common Types of Arrhythmias and How They’re Treated

Most of the time, your heart beats in a steady, reliable rhythm without you ever noticing. But when that rhythm changes — whether it feels fast, slow, or irregular — it can raise important questions about your heart health.

This type of change is often referred to as an arrhythmia, which occurs when the electrical signals that control the heartbeat don’t function properly. Instead of a steady rhythm, the heart may beat too quickly or too slowly. Some arrhythmias are harmless, while others may indicate a more serious issue that requires medical attention. If you or a loved one has recently been diagnosed with an arrhythmia or suspects something may be off with their heartbeat, here's what you need to know.

Different Types of Arrhythmias

Arrhythmias are typically grouped based on how they affect the heart rate. A fast heartbeat, at greater than 100 beats per minute, is known as tachycardia. A heart rate slower than normal, at less than 60 beats a minute, is known as bradycardia.

Tachycardia

Common types of arrhythmias, in which the heart beats too fast, include:

• Atrial fibrillation (AFib): The most common type of arrhythmia, where the upper chambers of the heart beat irregularly and out of sync with the lower chambers. This can reduce how effectively blood is pumped and increase the risk of blood clots, stroke and heart failure.
• Atrial flutter: An arrhythmia similar to AFib, but with a more organized rhythm. Atrial flutter can still affect how well the heart circulates blood, but it is often treatable.
• Supraventricular tachycardia (SVT): A term for a group of arrhythmias with fast heartbeats that may last for a few minutes or a few days. While SVT is usually not life-threatening in those with an otherwise healthy heart, severe cases can lead to cardiac arrest.
• Ventricular fibrillation: A cardiac emergency in which the lower chambers of the heart contract irregularly and rapidly, preventing blood from reaching the rest of the body. A normal heartbeat must be restored within minutes, using cardiopulmonary resuscitation (CPR) and/or a device called an automated external defibrillator (AED).
• Ventricular tachycardia: An arrhythmia that also affects the lower chambers of the heart, but in some cases, it may not be life-threatening, especially if there are no other heart conditions present.

Symptoms of tachycardia can include a racing heartbeat, dizziness, shortness of breath, or chest discomfort, though some people may not notice symptoms at all.

Bradycardia

Common types of arrhythmias, in which the heart beats too slowly, include:

• Sick sinus syndrome: A condition in which the heart's natural pacemaker, the sinus node, fails to send electrical signals at a consistent rate, causing the heart to beat too slowly, pause unexpectedly, or alternate between slow and fast rhythms. Sick sinus syndrome typically occurs in older adults and can be treated with medication.
• Conduction block: A type of arrhythmia in which the electrical signals that control your heartbeat become delayed or blocked. Conduction block disorders are generally treatable; however, more severe types, known as third-degree atrioventricular block, can be life-threatening.

Common symptoms of bradycardia may include fatigue, dizziness, lightheadedness, or fainting, but in some cases, patients may not experience any symptoms.

Treatment Options

Treatment depends on the type of arrhythmia, its cause, and how it affects overall heart function. In many cases, care is focused on managing symptoms and reducing risk of further complications.

In some cases, simple changes can help reduce episodes or improve heart health overall. This may include managing stress, limiting caffeine or alcohol intake, improving sleep, and addressing underlying conditions such as high blood pressure.

Medications may be used to control heart rate, stabilize heart rhythm, or reduce the risk of complications like blood clots. The specific medication plan depends on the type of arrhythmia and the patient’s overall health profile.

For certain arrhythmias, procedures may be recommended. One common option is catheter ablation, which uses energy to destroy small areas of heart tissue responsible for abnormal electrical signals.

Other treatments may include implantable devices such as pacemakers to regulate slow heart rhythms.

When to Seek Care

If you notice symptoms such as a racing or irregular heartbeat, dizziness, fainting, or unexplained fatigue, it’s important to have them evaluated. Even mild or occasional symptoms can provide important clues about your heart health.

Because arrhythmias can vary widely in severity and risk, an accurate diagnosis is necessary for an effective treatment plan. Evaluation may include a physical exam, electrocardiogram (ECG), heart monitoring, or other imaging and diagnostic tests to better understand how the heart is functioning.

At Carient Heart & Vascular, our team takes a comprehensive approach to diagnosing and managing heart rhythm conditions. If you’re experiencing symptoms or have concerns about your heart rhythm, schedule a consultation to better understand your condition and explore appropriate treatment options.