The main manifestations of heart failure patients are: exertional shortness of breath, nocturnal paroxysmal dyspnea, telangiectasia, swelling of the lower extremities, liver bruising, and fluid in the chest and abdominal cavity. Currently, it is difficult for patients to obtain fundamental improvement with medication, but cardiac resynchronization therapy – the installation of a triple-chamber pacemaker – can make a radical change. In the 20 years since the introduction of this technology, many patients have been given a new lease on life and miraculous results have occurred! Suitable patients treated with a suitable triple-chamber pacemaker and appropriate medication can improve their heart function, with 70% of patients expected to have a reduced heart size and basically live a near-normal life. The main conditions suitable for triple-chamber pacemaker therapy: heart failure grade 2-3, left ventricular enlargement, EF<35%; ECG: sinus rhythm, QRS wave over 120ms!