A portable telemetry device includes a measurement component, a unidirectional radio, a bidirectional radio, and a communication component. The measurement component is configured to receive, from at least one sensor, physiological data representative of a physiological condition of a patient. The unidirectional radio is configured to transmit signals in a first wireless frequency band. The bidirectional radio is configured to transmit and receive signals in a second wireless frequency band different from the first wireless frequency band. The communication component is configured to transmit the physiological data using the unidirectional radio and transmit and receive control data using the bidirectional radio.