What Is AV Delay?
AV delay, or atrioventricular delay, is the brief period between the contraction of the atria and the contraction of the ventricles during each heartbeat. This delay allows the ventricles enough time to fill with blood before pumping it to the lungs and the rest of the body.
In people with pacemakers, AV delay can be programmed to optimize heart function and improve blood circulation.
Why AV Delay Matters
A properly timed AV delay helps the heart pump blood efficiently. If the delay is too short or too long, the heart may not fill or pump as effectively, potentially leading to symptoms such as fatigue or shortness of breath.
Who May Be Affected by AV Delay?
- People with dual-chamber pacemakers
- Individuals with atrioventricular (AV) block
- People with heart failure
- Individuals with certain cardiac conduction disorders
Possible Symptoms of an Improper AV Delay
- Fatigue
- Dizziness
- Shortness of breath
- Reduced exercise tolerance
- Heart palpitations
- Lightheadedness
How Is AV Delay Evaluated?
Healthcare providers assess AV delay using pacemaker programming, electrocardiograms (ECGs), echocardiograms, and device interrogation to ensure the heart is beating as efficiently as possible.
How Is AV Delay Managed?
If necessary, healthcare providers can adjust pacemaker settings to optimize AV delay and improve heart performance based on an individual’s symptoms and cardiac function.
How Home Care Can Help
Home care professionals monitor symptoms, encourage medication adherence, support recovery after pacemaker implantation, reinforce healthy lifestyle habits, and remind individuals to attend regular device checkups.
Home Care Tip
Do not skip scheduled pacemaker evaluations. Regular device checks allow your healthcare provider to adjust settings, including AV delay, for optimal heart function.
Frequently Asked Questions About AV Delay
Is AV delay the same as AV block?
No. AV delay is a normal part of the heart’s electrical cycle, while AV block is a disorder that slows or prevents electrical signals from reaching the ventricles.
Can AV delay be adjusted?
Yes. In individuals with pacemakers, healthcare providers can adjust the programmed AV delay to improve heart performance.
Can home care help someone with a pacemaker?
Yes. Home care professionals assist with symptom monitoring, medication management, education, and recovery while helping individuals manage their heart condition safely.
When to Contact Your Healthcare Provider
Contact your healthcare provider if you experience increasing fatigue, dizziness, palpitations, fainting, or worsening shortness of breath after pacemaker implantation.