Heart Rate During Arrhythmia: What You Need to Know

Arrhythmias can manifest with various heart rate patterns depending on the type. Here's a closer look at how heart rate is affected by different forms of arrhythmia:

Types of Arrhythmia Based on Heart Rate

1. Tachyarrhythmias – Rapid Heart Rates

Tachyarrhythmias occur when the heart beats faster than normal, typically exceeding 100 beats per minute (BPM). In more severe cases such as supraventricular tachycardia (SVT) or atrial fibrillation, the heart rate can spike to over 150 BPM during an episode. These rapid rhythms can cause symptoms like dizziness, shortness of breath, and chest discomfort.

2. Bradyarrhythmias – Slow Heart Rates

Bradyarrhythmias are characterized by a heart rate below 60 BPM. Conditions like high-degree atrioventricular (AV) block can cause the heart to slow significantly, sometimes dropping as low as 30 BPM during an episode. This can lead to fatigue, lightheadedness, or even fainting.

3. Irregular but Normal-Rate Arrhythmias

Some arrhythmias don't change the overall heart rate but instead cause an irregular rhythm. In these cases, the heart still beats within the normal range of 60 to 100 BPM. However, patients may experience palpitations or irregular beats, such as premature atrial or ventricular contractions (PACs or PVCs).

Diagnosing Arrhythmias: More Than Just Heart Rate

It's important to note that heart rate alone isn't enough to diagnose an arrhythmia. A full evaluation should consider heart rhythm, electrocardiogram (ECG) findings, and the patient's clinical symptoms. If you experience episodes of rapid, slow, or irregular heartbeats, consulting a healthcare provider is essential for proper diagnosis and treatment.