Arrhythmia

Arrhythmia (cardiacarrhythmia) refers to any abnormality such as the origin of the heart rhythm, the beat frequency and rhythm, and impulse conduction. The meaning of the words "arrhythmia" or "arrhythmia" is more focused on the arrhythmia. Arrhythmia includes both rhythm and frequency abnormalities, which is more accurate and appropriate. Normal heart rhythm originates from the sinoatrial node, with a frequency of 60 to 100 beats / min (adult), which is relatively regular. The sinus node impulses sequentially excite the atria and ventricles through the normal atrioventricular conduction system, and the conduction time is constant (0.12 to 1.21 seconds for adults); the conduction time of impulses through the bundle branch and its branches and Purkinje fibers to the ventricular muscle is also constant (<0.10 second).