Hemodynamics and differentiated CO transfer following fulminant lung embolism and pulmonary artery embolectomy and following recurrent lung embolism

: Pulmonary embolectomy as an emergent surgical treatment after massive pulmonary embolism often is necessary in cardiogenic shock (CS) and even without previous diagnostic. If complete dissolution of the thromboembolus is possible or spreading of microemboli may occur is unknown. Therefore we studied 21 patients surgically treated by embolectomy, ten of these with consecutive cardiogenic shock (CS) and twelve patients after repetitive microembolism and cava-blocking. Besides lung-functional parameters for special CO-diffusion capacity (DLCO), differentiated in membrane (DM) and vascular (VC) component (Roughton and Forster), we measured mean pulmonary artery pressure (PAP) at rest and at exercise. Patients after repetitive embolism showed considerably more diminution of DLCO (-31%) than those after single massive embolic event (-15%) even concomitant by CS (-10%). Repetitive microembolism lowered VC by 21%. Slight decrease of DM was found after CS. Mean pulmonary artery pressure was elevated at rest (26 mm Hg) and exercise (33 mm Hg) after repetitive microembolism and normal after massive embolism or CS. Pulmonary embolectomy may prevent disturbances of DLCO or PAP even after CS. Damage of vascular integrity (VC) was found after microembolism. Pulmonary embolectomy seems to remove total embolic material and therefore seems to be optimal.