Low blood pressure after installation of cardiac pacing may be pacemaker syndrome, this disease will appear low blood pressure. Pacemaker syndrome refers to a group of clinical syndromes caused by hemodynamic and electrophysiologic abnormalities after pacemaker implantation, which may include dizziness, syncope, and shortness of breath, accompanied by hypotension or abnormal blood pressure fluctuations, pulmonary rales, edema, jugular vein tortuosity, varying heart tones, irregular heart rhythms, heart murmur during pacing, and signs of liver pulsation. The treatment of pacemaker syndrome is based on reducing the pacing frequency, switching to atrial-ventricular sequential pacing, and eliminating ventricular-atrial retrograde conduction. Diet, pacemaker syndrome should be given high vitamin, high protein, crude fiber, easy to digest diet, nutrient-rich diet can increase the patient’s resistance, crude fiber diet can prevent constipation. Low blood pressure after the installation of cardiac pacing should be promptly checked in the hospital, follow the doctor’s instructions to cooperate with the treatment.