Accession Number : ADA047428
Title : Left Anterior Hemiblock (LAH)--Diagnosis and Aeromedical Risk,
Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER ALA
Personal Author(s) : Pettyjohn,Frank S. ; Jones,Heber D. ; Denniston,Joseph C. ; Kelliher,John C. ; Akers,Lloyd A.
Report Date : 1977
Pagination or Media Count : 8
Abstract : Eighteen US Army initial flight applicants and trained aircrew were evaluated for the electrocardiographic diagnosis of left anterior hemiblock (LAH). This diagnosis was sustained in 50% by the addition of vectorcardiographic criteria. With computer processing and calculation of delay of the intrinsicoid deflection (ID) of the high lateral left ventricular activation time, the diagnosis was sustained in 50% of those records available. Review of the etiology, histopathology, and prognosis indicates definitive abnormalities of the trifascicular left bundle branch conduction system. It is essential a complete electrocardiogram (ECG) and vectorcardiogram (VCG) study of military aircrew be obtained to establish the diagnosis of true LAH. The incidence of true LAH is not available but the rarity of this finding with an unknown risk should preclude entry into military flight training. Complete cardiovascular evaluation of the trained airman with acquired LAH should include electrophysiologic studies and selective coronary arteriography and vertriculography prior to consideration for return to full flying duties. (Author)
Descriptors : *DIAGNOSIS(MEDICINE), *CARDIOVASCULAR SYSTEM, *VECTORCARDIOGRAPHY, FLIGHT CREWS, ETIOLOGY, PATIENTS, RECRUITS.
Subject Categories : Anatomy and Physiology
Medicine and Medical Research
Distribution Statement : APPROVED FOR PUBLIC RELEASE