Telemetry of Vital Signs
Telemetry of the vital signs is important. A worker in a protective suit in a hostile environment should have any means of monitoring life and suit condition just in case its is not sufficiently attentive and misses a danger indication on her own display. The worker can be warned to head for the air lock or a rescue team can rush in to retrieve her.
A heart monitor is a device used on Earth to accomplish this purpose.
Spacelabs worked on medical telemetry for astronauts in 1958.