CCI Registered Vascular Specialist (RVS) Practice Test

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A thrombus is found in a gastrocnemius muscular vein approximately a third of the way down the calf from the knee. If this were to propagate proximally, it would next involve:

the posterior tibial veins

the anterior tibial veins

the peroneal veins

the popliteal vein

The thrombus located in the gastrocnemius muscular vein has the potential to propagate proximally toward the heart. The structure of the venous system in the lower leg indicates that the gastrocnemius veins drain into the popliteal vein, which is situated behind the knee.

When considering the flow of blood and potential thrombus movement, if the thrombus moves upwards from the gastrocnemius veins, the next point it would reach is the popliteal vein. The popliteal vein serves as a central conduit for blood returning from the lower leg and can also receive blood from the deep veins of the calf, such as the gastrocnemius.

Other options such as the posterior tibial, anterior tibial, and peroneal veins are either tributaries of the popliteal vein or located more distally than the gastrocnemius veins. Therefore, rather than having a direct pathway from the gastrocnemius vein to these veins, the popliteal vein is the immediate next vessel involved should the thrombus propagate in a proximal direction.