Left anterior fascicular block
Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's weight loss doctor NYC
Philadelphia GLP-1 weight loss and GLP-1 clinic NYC
| Left anterior fascicular block | |
|---|---|
| Synonyms | Left anterior hemiblock |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Often asymptomatic, may cause syncope or dizziness |
| Complications | Complete heart block, arrhythmias |
| Onset | Typically in adults |
| Duration | Chronic |
| Types | N/A |
| Causes | Hypertension, coronary artery disease, aortic stenosis |
| Risks | Age, hypertension, ischemic heart disease |
| Diagnosis | Electrocardiogram (ECG) |
| Differential diagnosis | Left bundle branch block, right bundle branch block |
| Prevention | Control of risk factors such as hypertension and coronary artery disease |
| Treatment | Usually none required, treat underlying conditions |
| Medication | N/A |
| Prognosis | Generally good if isolated |
| Frequency | Common in older adults |
| Deaths | N/A |
A Left Anterior Fascicular Block (LAFB) is an electrocardiographic finding characterized by a slightly widened QRS duration.
Pathophysiology[edit]
LAFB occurs due to a conduction delay or blockage in the left anterior fascicle of the heart's ventricular conduction system, leading to altered electrical activity.
ECG Characteristics[edit]
Key ECG features of LAFB include:
- Slightly widened QRS complex (typically <120 ms)
- Left axis deviation
- Small q waves and tall R waves in the lateral leads
Causes[edit]
LAFB can be associated with:
- Hypertensive heart disease
- Aortic stenosis
- Cardiomyopathies
- Myocardial infarction
- Degenerative changes in the conduction system
Clinical Significance[edit]
While LAFB itself usually does not cause symptoms, it can be indicative of underlying heart disease and may affect the interpretation of the ECG in the context of myocardial ischemia.
Diagnosis[edit]
Diagnosis of LAFB is primarily based on ECG findings. Additional tests might include echocardiography or MRI to assess structural heart abnormalities.
Treatment[edit]
LAFB does not typically require specific treatment but managing underlying conditions is crucial. Regular cardiac evaluation is recommended.
Prognosis[edit]
The prognosis of LAFB varies depending on the associated cardiac conditions.
Epidemiology[edit]
LAFB is more commonly seen in older adults and those with hypertension or other forms of heart disease.
See Also[edit]
References[edit]
External Links[edit]
| Cardiovascular disease (heart) | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sponsored Health Resource
W8MD Weight Loss, Sleep & MedSpa
Looking for physician-supervised weight loss, semaglutide, tirzepatide, or GLP-1 receptor agonist options? W8MD helps eligible patients in New York City, Brooklyn, New Jersey, Connecticut, Pennsylvania, Delaware, and greater Philadelphia with medical weight loss, sleep medicine, and long-term maintenance support.
GLP-1 specials: Affordable GLP-1 injections NYC and Philadelphia starting from $29.99/week and up for semaglutide with insurance accepted for qualifying visits, and $45/week and up for tirzepatide with insurance accepted for qualifying visits. Self-pay options start from $59.99/week and up for semaglutide and $69.99/week and up for tirzepatide.
Medical weight loss NYC | Affordable GLP-1 injections NYC | Budget GLP-1 weight loss shots Philadelphia | New Jersey medical weight loss | NYC medical weight loss | Philadelphia medical weight loss | Sleep clinic NYC | W8MD's Philadelphia GLP-1 doctor | Weight loss prescriptions NYC
Book a W8MD appointment · View GLP-1 specials
Paid promotional message. Eligibility, pricing, insurance coverage, medication availability, and results vary. Medical evaluation required.
Medical Disclaimer: WikiMD is for informational purposes only and is not a substitute for professional medical advice. Content may be inaccurate or outdated and should not be used for diagnosis or treatment. Always consult your healthcare provider for medical decisions. Verify information with trusted sources such as CDC.gov and NIH.gov. By using this site, you agree that WikiMD is not liable for any outcomes related to its content. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Translate page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
.png){kind=link}