title: Meteorologic influences on the frequency of pulmonary embolism.
abstract: OBJECTIVE
  Reports published earlier this century suggested that meteorologic factors influence the incidence of pulmonary embolism. These observations were based on few patients and often lacked rigorous standards of evidence. In the current study, the authors evaluate the association between barometric pressure changes and pulmonary embolism using radionuclide ventilation-perfusion (V/Q) scan data.
  
  
  METHODS
  Daily interpretation data for V/Q lung scans were correlated retrospectively with daily local barometric pressure changes over a 7-year period.
  
  
  RESULTS
  The incidence of pulmonary embolic disease was significantly related to a decrease in barometric pressure during the 3 days preceding clinical presentation.
  
  
  CONCLUSIONS
  Meteorologic factors are less important than better-known risk factors for pulmonary embolism; however, their effect is demonstrable in a large data sample. This work confirms previously published associations between barometric pressure changes and the incidence of pulmonary embolism.
authors.affiliation: Department of Radiology, Massachusetts General Hospital, Boston 02114.
authors.forename: J A
authors.initials: JA
authors.lastname: Scott
authors.forename: E L
authors.initials: EL
authors.lastname: Palmer
authors.forename: A J
authors.initials: AJ
authors.lastname: Fischman
authors.forename: H W
authors.initials: HW
authors.lastname: Strauss
mesh_terms: D000704:Analysis of Variance; D001274:Atmospheric Pressure; D001900:Boston / Q000453:epidemiology; D005583:Fourier Analysis; D006801:Humans; D015994:Incidence; D008685:Meteorological Concepts; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging / Q000453:epidemiology*; D011877:Radionuclide Imaging; D012189:Retrospective Studies; D013997:Time Factors; D014692:Ventilation-Perfusion Ratio