Electrocardiogram shows sinus rhythm electrocardiographic axis right deviation, the reasons are as follows: 1, normal vertical heart: lean and long body type will reflect the electrocardiographic axis right deviation, is the normal situation, with the body type lean and long, resulting in electrodes when doing electrocardiogram; 2, electrocardiographic axis right deviation between 90 ° -100 °: suggests that the right ventricular large and left bundle branch conduction block situation can appear at the same time, is also the normal situation of young people and children; 3,, Right-sided cardiac axis >110°: there may be right ventricular hypertrophy, right bundle branch block and other cardiomyopathy effects. The presence of right deviation must be combined with cardiac ultrasound to determine whether there is any clinical pathological significance. If so, aggressive treatment should be performed, especially in the case of right bundle branch block. Many people have a right-sided cardiac axis, both physiologically and pathologically. Therefore, if this condition occurs on the ECG, it is important to actively seek professional evaluation or to have a cardiac ultrasound to determine whether there is any clinical pathological significance, and not to be confused by the right deviation.