Indications for beta blockers include:

Angina pectoris (contraindicated for Prinzmetals angina)
Atrial fibrillation
Cardiac arrhythmia
Congestive heart failure
Essential tremor
Glaucoma (as eye drops, they decrease intraocular pressure by lowering aqueous humor secretion)
Hypertension, although they are generally not preferred as an initial treatment
Hyperthyroidism
Migraine prophylaxis
Mitral valve prolapse
Myocardial infarction
Phaeochromocytoma, in conjunction with α-blocker
Postural orthostatic tachycardia syndrome
Symptomatic control (tachycardia, tremor) in anxiety and hyperthyroidism
Theophylline overdoseBeta blockers have also been used for:
Acute aortic dissection
Hypertrophic obstructive cardiomyopathy
Long QT syndrome
Marfan syndrome (treatment with propranolol slows progression of aortic dilation and its complications)
Prevention of variceal bleeding in portal hypertension
Possible mitigation of hyperhidrosis
Social and other anxiety disorders
Controversially, for reduction of perioperative mortality in non-cardiac surgery, but the best evidence suggests that they increase mortality when used this way

Congestive heart failure
Although beta blockers were once contraindicated in congestive heart failure, as they have the potential to worsen the condition due to their effect of decreasing cardiac contractility, studies in the late 1990s showed their efficacy at reducing morbidity and mortality.Bisoprolol, carvedilol, and sustained-release metoprolol are specifically indicated as adjuncts to standard ACE inhibitor and diuretic therapy in congestive heart failure, although at doses typically much lower than those indicated for other conditions. Beta blockers are only indicated in cases of compensated, stable congestive heart failure; in cases of acute decompensated heart failure, beta blockers will cause a further decrease in ejection fraction, worsening the patients current symptoms. Beta blockers are known primarily for their reductive effect on heart rate, although this is not the only mechanism of action of importance in congestive heart failure.
Management
Although surgery is the treatment of choice, it must be preceded by imaging studies to exclude an intracranial connection. Potential complications include meningitis and a cerebrospinal fluid leak. Recurrences or more correctly persistence may be seen in up to 30% of patients if not completely excised. Epidemiology
Nasal glial heterotopia is rare, while an encephalocele is uncommon. NGH usually presents in infancy, while encephalocele may present in older children and adults. It is seen in both genders equally. References
Further reading
Lester D. R. Thompson; Bruce M. Wenig (2011). Diagnostic Pathology: Head and Neck: Published by Amirsys. Hagerstown, MD: Lippincott Williams & Wilkins. pp. 1:1–2. ISBN 978-1-931884-61-7.