Massive Thrombotic Occlusion of the Large Pulmonary Arteries

Abstract
In 23 cases of massive thrombotic occlusion of the large pulmonary arteries thrombosis secondary to pulmonary embolism was the major cause, but a proportion (30 per cent) was considered to have primary thrombosis in situ. The pathologic criteria, symptoms, signs, and results of special investigations are given in detail, and the diagnosis, etiology, and precipitating factors are discussed.