Panicky heart, weak legs, this situation should look for the cause. First of all, the most common for this situation is the reaction of hypoglycemia, once hypoglycemia patients will soon appear weakness, in addition to the acceleration of the heart rate, panic this feeling. Therefore, once this situation occurs, we should determine whether it is hypoglycemia, which is very easy to determine, just take a blood glucose test. If the blood glucose is just below 2.8mmol/L, it is certain that it is hypoglycemia. Another condition may be arrhythmia, such as paroxysmal supraventricular tachycardia, which occurs when the heart rate is relatively fast, often exceeding 160 beats per minute. In this case there is definitely a feeling of panic and then weakness in the legs. Another is that frequent ventricular premature beats will also have this feeling, because ventricular premature beats are frequent many ventricular premature beats have no ejection function, the patient’s heart will be very obvious panic will also have this feeling of leg weakness. Therefore, we need to find out the cause of the panic and weakness of the legs, mainly because the above three conditions are common.