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Ectopic beat is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fibers or group of fibers outside the region in the heart muscle ordinarily responsible for impulse formation (i.e., the sinoatrial node).
The basic rhythm of the heart raises these cells to threshold, which precipitates an ectopic beat. This process is the underlying mechanism for arrhythmias due to excess catecholamines and some electrolyte deficiencies, particularly low blood potassium , known as hypokalemia.
An ectopic pacemaker, also known as ectopic focus or ectopic foci, is an excitable group of cells that causes a premature heart beat outside the normally functioning SA node of the heart. It is thus a cardiac pacemaker that is ectopic , producing an ectopic beat .
When we detect heart rates over 90 bpm at rest, that can indicate a sign that something else is at play, such as anemia, dehydration, or even thyroid disease, says Ronald Freudenberger, M.D ...
Rhythms produced by an ectopic focus in the atria, or by the atrioventricular node, are the least dangerous dysrhythmias; but they can still produce a decrease in the heart's pumping efficiency because the signal reaches the various parts of the heart muscle with different timing than usual and can be responsible for poorly coordinated contraction.
A premature heart beat or extrasystole [1] is a heart rhythm disorder corresponding to a premature contraction of one of the chambers of the heart. Premature heart beats come in two different types: premature atrial contractions and premature ventricular contractions. Often they cause no symptoms but may present with fluttering in the chest or ...
Non-commercial aviation is remarkably dangerous, with hundreds of accidents occurring each year. There were 1,248 accidents in 2009, 1,236, and in 2010, and 937 so far this year. In total, 1,112 ...
The group has represented Texas women in several major lawsuits, including Zurawski v. Texas, in which 22 patients and two OB-GYNs sued the state over what they said was a lack of clarity in the ...
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