[Yesterday really scared the hell out of me! [My friend Xiao Zhang complained on the phone: “I woke up in the middle of the night and felt my heart was jumping out. The whole person was not well. It took more than 10 minutes to recover.” [Did you go to see a doctor and have an electrocardiogram? ] [I went early this morning. The electrocardiogram report is sinus rhythm. The doctor asked me to pay attention to rest and don’t stay up late. What is sinus rhythm? Is it normal? [Xiao Zhang asked anxiously. How does the heart beat? To understand the problem of heart rhythm (i.e. Heart rhythm), one must first understand how the heart beats. Although the heart Read More …