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Ventricular fibrillation (V-fib or VF) is an abnormal heart rhythm in which the ventricles of the heart quiver. [2] It is due to disorganized electrical activity. [2] Ventricular fibrillation results in cardiac arrest with loss of consciousness and no pulse. [1] This is followed by sudden cardiac death in the absence of treatment. [2]
In experimental animal models in pigs studying impacts by a hard ball to the chest wall, impacts that occurred directly over the center of the left ventricle, where there is no overlying lung tissue, were the most likely to cause ventricular fibrillation. [1] Impacts not over the heart did not cause ventricular fibrillation. [1] Ventricular ...
Ventricular fibrillation occurs in the ventricles (lower chambers) of the heart; it is always a medical emergency. If left untreated, ventricular fibrillation (VF, or V-fib) can lead to death within minutes. When a heart goes into V-fib, effective pumping of the blood stops. V-fib is considered a form of cardiac arrest.
There are two major classes of cardiac fibrillation: atrial fibrillation and ventricular fibrillation. Atrial fibrillation is an irregular and uncoordinated contraction of the cardiac muscle of atria. It can be a chronic condition, usually treated with anticoagulation and sometimes with conversion to normal sinus rhythm.
Ventricular fibrillation is a major cause of cardiac arrest, or sudden cardiac death, which accounts for about 10% of mortality in adults, causing 350 000 deaths in the US each year. [10] Michel Haïssaguerre's team showed that patients with sudden cardiac death and structurally normal hearts frequently had triggers originating from Purkinje ...
However, ventricular tachycardia and ventricular fibrillation remain the most important causes of sudden death following spontaneous restoration of antegrade flow. [6] Prior to the modern practice of percutaneous coronary intervention for acute coronary syndrome , pharmacologic thrombolysis was more common and accelerated idioventricular ...
12-lead ECG of ventricular fibrillation. Primary ventricular fibrillation (PVF) is an unpredictable [1] and potentially fatal arrhythmia occurring during the acute phase of a myocardial infarction leading to immediate collapse and, if left untreated, leads to sudden cardiac death within minutes.
Acute occurrence is usually non-life-threatening, but chronic occurrence can progress into tachycardia, [1] bradycardia or ventricular fibrillation. [2] In a normal heart beat rhythm, the SA node usually suppresses the ectopic pacemaker activity due to the higher impulse rate of the SA node. However, in the instance of either a malfunctioning ...
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