1 year ago by Laser Vein Center YES a blood clot in a gastrocnemius vein is considered a DVT or deep vein thrombosis. It can be serious if it extends or grows. However with prompt treatment the risk of any serious medical complication is quite small.YES a blood clot in a gastrocnemius vein is considered a DVT or deep vein thrombosis. It can be serious if it extends or grows. However with prompt. treatment the risk of any serious medical complication is quite small. year ago by The Sheen Vein Institute (View Profile). The gastrocnemius vein is considered a deep vein: therefore, the presence of a blood clot in this vessel is technically considered a deep vein thrombosis or DVT.