When the sinus node becomes irregularly excited, it causes a change in the rhythm of the heart's contractions, called sinus arrhythmia.

The heart has a command called the "sinus node," and in a healthy person, the heart's excitement starts from the sinus node, which is able to send out rhythmic excitement (60-100 times/minute), and then the excitement is transmitted to the ventricles through the atria and AV nodes in turn, so that the whole heart contracts and diastoles according to the order of regularity, thus ensuring the pumping function of the heart. This ensures the pumping function of the heart. The rhythm of the heart from the sinus node is called sinus rhythm.

So, the normal beating of the heart should be sinus rhythm. When the sinus node sends out agitation irregularly, it causes a change in the contraction rhythm of the heart, which is called sinus arrhythmia.

/iknow-pic.cdn.bcebos.com/b8014a90f603738da940ce72bc1bb051f819ec5c "target="_blank "title="" class="ikqb_img_alink">/iknow- pic.cdn.bcebos.com/b8014a90f603738da940ce72bc1bb051f819ec5c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1% 2Fquality%2Cq_85%2Fformat%2Cf_auto "esrc="/n1/2017/0305/c14739-29123724.html "target="_blank "title="Only support the selection of a link when the effective">People's Daily Online - physical examination detected sinus arrhythmia? It's not a disease