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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]
Some studies have noted the incidence of TIC in adults with irregular heart rhythms to range from 8% to 34%. [5] Other studies of patients with atrial fibrillation and left ventricular dysfunction estimate that 25–50% of these study participants have some degree of TIC. [6] TIC has been reported in all age groups. [6]
Fibrillation can affect the atrium (atrial fibrillation) or the ventricle (ventricular fibrillation): ventricular fibrillation is imminently life-threatening. Atrial fibrillation affects the upper chambers of the heart, known as the atria. Atrial fibrillation may be due to serious underlying medical conditions and should be evaluated by a ...
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.
The mechanism responsible for the majority of sudden cardiac deaths is ventricular fibrillation. Ventricular fibrillation is a tachyarrhythmia characterized by turbulent electrical activity in the ventricular myocardium leading to a heart rate too disorganized and rapid to produce any meaningful cardiac output, thus resulting in insufficient ...
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.
The most common symptoms people with HHS have are heart palpitations and arrhythmia. [19] People usually present with atrial fibrillation; however, other forms of arrhythmia may be developed, such as atrial tachycardia, premature ventricular contraction, and atrial flutter.
There are no symptoms or signs associated with it. It was originally thought of as having a benign prognosis. In the Framingham Heart Study , however, the presence of a prolonged PR interval or first degree AV block doubled the risk of developing atrial fibrillation , tripled the risk of requiring an artificial pacemaker , and was associated ...
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