Ventricular fibrillation (V-fib or VF) is an abnormal heart rhythm in which the ventricles of the heart quiver. It is due to disorganized electrical activity. Ventricular fibrillation results in cardiac arrest with loss of consciousness and no pulse. This is followed by sudden cardiac death in the absence of treatment. Ventricular fibrillation is initially found in about 10% of people with cardiac arrest.Ventricular fibrillation can occur due to coronary heart disease, valvular heart disease, cardiomyopathy, Brugada syndrome, long QT syndrome, electric shock, or intracranial hemorrhage. Diagnosis is by an electrocardiogram (ECG) showing irregular unformed QRS complexes without any clear P waves. An important differential diagnosis is torsades de pointes.Treatment is with cardiopulmonary resuscitation (CPR) and defibrillation. Biphasic defibrillation may be better than monophasic. The medication epinephrine or amiodarone may be given if initial treatments are not effective. Rates of survival among those who are out of hospital when the arrhythmia is detected is about 17% while in hospital it is about 46%. Signs and symptoms
Ventricular fibrillation is a cause of cardiac arrest. The ventricular muscle twitches randomly rather than contracting in a co-ordinated fashion (from the apex of the heart to the outflow of the ventricles), and so the ventricles fail to pump blood around the body – because of this, it is classified as a cardiac arrest rhythm, and patients in V-fib should be treated with cardiopulmonary resuscitation (CPR) and prompt defibrillation.
Betamethasone is also used prior to delivery of a preterm baby to help prepare the lungs for breathing. However, because betamethasone crosses the placenta, which is required for its beneficial effects, it may also be associated with complications, such as hypoglycemia and leukocytosis in newborns exposed in utero. When injected into the epidural space or the spine, it may cause serious side effects like loss of vision, stroke, and paralysis. Forms
Betamethasone is available in a number of compound forms: betamethasone dipropionate (branded as Diprosone, Diprolene, Celestamine, Procort (in Pakistan), and others), betamethasone sodium phosphate (branded as Bentelan in Italy) and betamethasone valerate (branded as Audavate, Betnovate, Celestone, Fucibet, and others). In the United States and Canada, betamethasone is mixed with clotrimazole and sold as Lotrisone and Lotriderm. It is also available in combination with salicylic acid (branded as Diprosalic) for using in psoriatic skin conditions. In some countries, it is also sold mixed with both clotrimazole and gentamicin to add an antibacterial agent to the mix. Betamethasone sodium phosphate mixed with betamethasone acetate is available in the United States as Celestone Soluspan. See also
Betamethasone/dexchlorpheniramine

References
External links
"Betamethasone". Drug Information Portal. U.S. National Library of Medicine. "Betamethasone sodium phosphate". Drug Information Portal. U.S. National Library of Medicine. "Betamethasone acetate mixture with betamethasone sodium phosphate". Drug Information Portal. U.S. National Library of Medicine.