 In the 1980s, the Soviets had at least three incidents where cosmonauts had to be returned under urgent medical conditions.Because of its potential use as a medical evacuation method, the CRV design was required to address a number of issues that are not factors for a standard crewed space vehicle.Foremost of these are the "g"-loadings as influenced by reentry profiles and deceleration/landing methods upon patients with hemorrhagic shock issues.