Accession Number:

ADA275485

Title:

Incidence of Cardiac Dysrhythmias Occurring during Centrifuge Training

Descriptive Note:

Rept. for Jan 84-Oct 91,

Corporate Author:

ARMSTRONG LAB BROOKS AFB TX

Personal Author(s):

Report Date:

1992-12-01

Pagination or Media Count:

6.0

Abstract:

High-G training has been reported to provoke dysrhythmias in many subjects. These reports have been based on small subject groups. Students attending aeromedical professional courses at the USAF School of Aerospace Medicine are offered the opportunity to participate in high-G centrifuge training on the Armstrong Laboratory Centrifuge, during which ECG monitoring is routinely performed. This study documents the incidence of dysrhythmias in this large group of subjects. The pertinent information from the records of 1180 training sessions from 1984 through 1991 were transcribed to a database on a personal computer. Dysrhythmias were recorded in 552 47 of the training sessions. Ventricular ectopy occurred in 480 41 of the sessions, and supraventricular dysrhythmias appeared in 127 11. In 53 4.5 of the sessions, training either was or would have been terminated because of the arrhythmia. Session-terminating dysrhythmias included 26 ventricular tachycardias 2.2, including 18 triplets 1.5 9 ventricular couplets 0.8 8 episodes of too-frequent ventricular premature beats 0.7 4 of supraventricular tachycardia 0.3, including 2 with aberrant conduction 0.2 2 of aberrantly conducted beats 0.2 and 4 of anomalous bradycardia 0.3. Centrifuge training can provoke serious dysrhythmias in ostensibly healthy individuals, and ECG monitoring of aircrew undergoing such training is recommended for their safety. Because some of these dysrhythmias are disqualifying for aircrew duties, the need for a more lenient aeromedical disposition policy must be considered. Arrhythmia, High-G Centrifuge training, Aircrew.

Subject Categories:

  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE