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The most common symptom of arrhythmia is an awareness of an abnormal heartbeat, called palpitations. These may be infrequent, frequent, or continuous. Some of these arrhythmias are harmless (though distracting for patients) but some of them predispose to adverse outcomes. Arrhythmias also cause chest pain and shortness of breath. [citation needed]
Anticoagulants: To prevent embolization.. Beta blockers: To block the effects of certain hormones on the heart to slow the heart rate.. Calcium Channel Blockers: Help slow the heart rate by blocking the number of electrical impulses that pass through the AV node into the lower heart chambers (ventricles).
There are 6 different sinus arrhythmia. [1] [2]A normal heart should have a normal sinus rhythm, this rhythm can be identified by a ventricular rate of 60-100 bpm, at a regular rate, with a normal PR interval (0.12 to 0.20 second) and a normal QRS complex (0.12 second and less).
Rate dependence of the action potential is a fundamental property of cardiac cells and alterations can lead to severe cardiac diseases including cardiac arrhythmia and sometimes sudden death. [3] Action potential activity within the heart can be recorded to produce an electrocardiogram (ECG).
An arrhythmia is defined as any disturbance in the cardiac activation sequence or any deviation from accepted limits for the rate or regularity of the normal impulse. The main types of arrhythmias leading to sudden cardiac death are tachyarrhythmias and bradyarrhythmia.
Afterdepolarizations may lead to cardiac arrhythmias. Afterdepolarization is commonly a consequence of myocardial infarction, cardiac hypertrophy, or heart failure. [1] It may also result from congenital mutations associated with calcium channels and sequestration. [2]
A common arrhythmia that can lead to this form of cardiomyopathy is the common atrial fibrillation. Takotsubo cardiomyopathy (Transient apical ballooning, stress-induced cardiomyopathy) – A type of dilated cardiomyopathy caused by a sudden temporary weakening of the myocardium, which can include emotional stress (i.e. broken-heart syndrome).
People considered to be at high risk for an arrhythmia include those with organic heart disease or any myocardial abnormality that may lead to serious arrhythmias. [1] These conditions include a scar from myocardial infarction, idiopathic dilated cardiomyopathy , clinically significant valvular regurgitant, or stenotic lesions and hypertrophic ...