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Activity-sensing permanent internal pacemaker dysfunction during helicopter aeromedical transport.

R S Gordon·K B O'Dell·R B Low·I J Blumen
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Abstract

STUDY OBJECTIVES: This study was designed to establish the frequency, magnitude, and possible etiologies of the dysfunction of activity-sensing internal pacemakers during helicopter aeromedical transport. DESIGN: Two models of Medtronic Activitrax pacemakers were attached externally to healthy adult volunteers. Each volunteer then was loaded into the helicopter and subjected to a flight sequence. Pacemaker firing rates throughout this sequence were recorded. SETTING: On separate days, Aerospatiale Dauphin and Twinstar helicopters completed a total of 23 flights. TYPE OF PARTICIPANTS: Four healthy adult volunteers, two men and two women, participated. INTERVENTIONS: These included intra- and inter-flight threshold re-programming and external magnet application. RESULTS: The average preflight pacemaker rate of 65 beats per minute increased to an average in-flight rate of 105 beats per minute, which resolved to preflight rates on shutdown. This pattern was consistently extinguished with external magnet application. CONCLUSION: The effect of rotor motion and flight vibration on the rate-response of the Activitrax pacemaker is both predictable and easily preventable. Possible guidelines for the safe transport of these patients, using pacemaker reprogramming or external magnet application, are examined.

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AdultAircraftDouble-Blind MethodEquipment FailureFemaleHumansMalePacemaker, ArtificialRotationSoftwareTherapy, Computer-AssistedTransportation of PatientsVibrationClinical TrialJournal ArticleRandomized Controlled TrialResearch Support, Non-U.S. Gov't

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R S Gordon, K B O'Dell, R B Low, I J Blumen. 1990. Activity-sensing permanent internal pacemaker dysfunction during helicopter aeromedical transport.. https://doi.org/10.1016/s0196-0644(05)82284-x

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