This paper reports a case of the successful surgical treatment of the massive fixed thrombus in the right heart combined with recurrent thromboembolism of the minor pulmonary artery branches. The source of thromboembolism was thrombosed deep veins of the lower extremities. At the first stage of the surgical intervention, the cava filter was installed in the inferior vena cava, the second stage consisted of endovascular thrombus extraction from the right heart and thrombolysis. Despite the initially severe somatic conditions of the patient including pronounced respiratory and cardiac insufficiency, renal dysfunction, and advanced age, the treatment resulted in the significant improvement of the patient’s state apparent as the disappearance of apnoea, stabilization of hemodynamics, and normalization of the renal function. The patient was discharged from the clinic in satisfactory condition.