Rapid, repeated firing of ventricular muscle fibers without coordinated contraction of the muscle itself; can result in cardiac arrest and death.
a fast unorganized heart rhythm caused by abnormal electrical impulses or circuits within the ventricles
An often fatal form of arrhythmia characterized by rapid, irregular twitching of the ventricles of the heart in place of normal contractions, with loss of pulse
A condition in which the ventricles contract in a rapid, unsynchronized fashion. When fibrillation occurs, the ventricles cannot pump blood throughout the body.
asynchronous ventricular contractions that result in cardiovascular failure
cardiac standstill with ineffective pumping action of the heart due to rhythm abnormalities; main cause of sudden death in the US (300,000 annually) due mostly to coronary atherosclerosis.
An erratic, disorganized firing of impulses from the ventricles. The ventricles quiver and are unable to contract or pump blood to the body. This is a medical emergency that must be treated with cardiopulmonary resuscitation (CPR) and defibrillation as soon as possible.
Totally disorganized pattern of activation of ventricular muscle - small sections contracting independently; therefore no coordinated contraction across ventricle capable of generating force to drive blood onwards. Unless reversed, death follows. See cardioversion.
A life threatening disturbance of the heart rhythm whereby the ventricles of the heart initiate impulses at a fast irregular rate causing the ventricles to fibrillate or quiver, which leads to imsufficient blood to be pumped around the body.
fibrillation of heart muscles resulting in interference with rhythmic contractions of the ventricles and possibly leading to cardiac arrest
(V-Fib) A lethal arrhythmia characterized by the rapid, chaotic movements of the heart muscle that causes the heart to stop functioning and leads quickly to cardiac arrest.
Sudden cardiac arrest, caused by ventricular fibrillation, poses the greatest threat and accounts for half of all cardiac arrests. Also known as cardiac arrest, sudden cardiac arrest is due to an electrical circuitry problem. It is not a the same as a heart attack, or myocardial infarction, which is a circulatory problem caused by clogged blood vessels that cut off the supply of blood to the heart. In VF, the heartbeat is rapid and chaotic, which causes the lower heart chambers, or ventricles, to go into a spasm. Sometimes, however, a heart attack can lead to VF. VF is abrupt and happens without any warning and it halts all heart functioning. The lack of oxygen throughout the body, and especially to the brain, is deadly.
a heart rhythm disorder originating in the ventricles. It is an abnormally rapid heart rhythm that is unstable and irregular. Electronic signals move through the heart erratically and prevent it from beating properly. The patient may feel faint. If untreated, it may cause cardiac arrest.
A condition in which the ventricles contract in a rapid, unsynchronized, uncoordinated fashion so that no blood is pumped from the heart.
a condition in which the ventricles contract in rapid and unsynchronized rhythms and cannot pump blood into the body.
Rapid, irregular contractions of the heart.
rapid, ineffective contractions by the ventricles of the heart.
(VF): a very fast, irregular heart rate caused by abnormal impulses starting from several areas of the ventricle. The heart beats so fast that it is unable to pump any blood to the body. A heart in fibrillation may beat over 300 times a minute. A person in fibrillation passes out and needs immediate medical attention in order to live.
A very fast, irregular heartbeat that is caused by abnormal impulses coming from several areas of the heart. These abnormal impulses take over the natural pacemaker function of the SA node. The heartbeat is so fast that the heart does not have time to pump enough blood to the brain and body tissue, which may cause unconsciousness, cardiac arrest, and death.
a condition in which the heart does not contract and blood is not pumped to the body.
A heart rhythm disorder that originates in the ventricles. It is characterized by an abnormally rapid heart rhythm that is also highly unstable and irregular. During VF, electrical signals are moving chaotically through the heart, preventing it from beating properly. This often results in fainting. If left untreated, it may result in cardiac arrest.
Rapid, uncoordinated, and ineffective contractions of the heart initiated by electrical impulses from the ventricles. Can be fatal if it is not reversed.
Irregular heartbeat characterized by uncoordinated contractions of the ventricle
A arrhythmia in which there is a sudden electrical chaotic activity and loss of coordinated contractions of the heart resulting in sudden death. If ventricular fibrillation is not rapidly treated it will be fatal within minutes.
An abnormal irregular heart rhythm whereby there are very rapid uncoordinated fluttering contractions of the lower chambers (ventricles) of the heart. Ventricular fibrillation disrupts the synchrony between the heartbeat and the pulse beat. Ventricular fibrillation is most commonly associated with heart attacks or scarring of the heart muscle from previous heart attack. It is life threatening. Ventricular fibrillation is most commonly associated with heart attacks or scarring of the heart muscle from previous heart attack. It is life threatening.
Inability to pump blood.
A condition in which the ventricles contract in an uncoordinated fashion so blood is not able to be pumped from the heart to the body.
Ineffective, uncoordinated muscular contractions of the heart's ventricles. Can lead to cardiac arrest or myocardial infarction.
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart. As a result, the heart fails to adequately pump the blood, and tachycardia and hypoxia may occur.