What Is AV Nodal Reentry Tachycardia (AVNRT)?
Atrioventricular nodal reentry tachycardia (AVNRT) is a common type of supraventricular tachycardia (SVT) that causes episodes of a rapid heartbeat. It occurs when an extra electrical pathway develops within or near the atrioventricular (AV) node, allowing electrical signals to circulate repeatedly and trigger a fast heart rhythm.
Episodes often begin and end suddenly and may last from a few seconds to several hours.
Why AVNRT Matters
Although AVNRT is usually not life-threatening in otherwise healthy individuals, frequent or prolonged episodes can interfere with daily activities and may require medical treatment.
Common Symptoms
- Rapid heartbeat
- Heart palpitations
- Dizziness
- Lightheadedness
- Shortness of breath
- Chest discomfort
- Fatigue
- Anxiety during episodes
Possible Triggers
- Stress
- Caffeine
- Alcohol
- Smoking
- Lack of sleep
- Strenuous exercise
- Certain medications
How Is AVNRT Diagnosed?
Healthcare providers diagnose AVNRT using an electrocardiogram (ECG), Holter monitor, event monitor, electrophysiology study, and other heart rhythm tests.
How Is AVNRT Treated?
Treatment may include vagal maneuvers, medications to slow the heart rate, catheter ablation to eliminate the abnormal electrical pathway, or ongoing monitoring depending on symptom frequency.
How Home Care Can Help
Home care professionals encourage medication adherence, help individuals identify potential triggers, monitor symptoms, educate families about when to seek emergency care, and support healthy lifestyle habits.
Home Care Tip
If your healthcare provider has taught you vagal maneuvers, perform them only as instructed when an episode begins.
Frequently Asked Questions About AVNRT
Is AVNRT dangerous?
AVNRT is often not life-threatening, but frequent or severe episodes should be evaluated and treated by a healthcare provider.
Can AVNRT be cured?
Yes. Catheter ablation is highly effective and can permanently eliminate AVNRT in many individuals.
Can home care help someone with AVNRT?
Yes. Home care professionals support medication management, symptom monitoring, education, and healthy lifestyle habits while helping individuals manage their condition safely.
When to Seek Emergency Medical Care
Seek emergency medical attention if a rapid heartbeat is accompanied by chest pain, severe shortness of breath, fainting, or symptoms that do not improve as directed by your healthcare provider.