title: Gastric involvement in progressive systemic sclerosis: electrogastrographic and sonographic findings.
abstract: OBJECTIVE
  To determine whether electrogastrography (EGG) can discern sonographically demonstrated motility disorders in patients with progressive systemic sclerosis (SSc) and to evaluate EGG as a possible diagnostic tool.
  
  
  METHODS
  Prospective study with control group and testing for reliability.
  
  
  METHODS
  15 SSc patients [women aged 33-70 years (mean 53.3 years)] and 15 healthy volunteers.
  
  
  METHODS
  Bipolar cutaneous EGG was recorded to obtain the following parameters: period dominant frequency (PDF), percentage of gastric dysrhythmia and normogastria (defined as 2-4/min), period dominant power (PDP) and its change after a standardized meal of 500 kcal (2093 kJ), and instability coefficients of dominant frequency and power (DFIC, DPIC). Simultaneously, real-time sonography was performed in the aortomesenteric plane (3.5-MHz curved-array probe). In 10 patients and 13 control subjects, the distance from the anterior wall of the gastric antrum to the abdominal skin was measured.
  
  
  RESULTS
  Three patients (20%) showed hypomotility of the gastric antrum sonographically. The percentage of bradygastria was significantly lower in these patients, but the PDF, DFIC and DPIC values were not significantly different. The distance between the cutaneous electrodes and the antrum bore a greater relationship to the PDP values than did the sonographically demonstrated number of gastric contractions.
  
  
  CONCLUSIONS
  Although cutaneous EGG can be performed in SSc patients without apparent derangement in frequency and stability of the signal, it offers no advantage over sonography in diagnosis and follow-up.
authors.affiliation: Department of Medicine, University of Erlangen-Nuremberg, Erlangen, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Marycz
authors.forename: S M
authors.initials: SM
authors.lastname: Muehldorfer
authors.forename: M S
authors.initials: MS
authors.lastname: Gruschwitz
authors.forename: A
authors.initials: A
authors.lastname: Katalinic
authors.forename: C
authors.initials: C
authors.lastname: Herold
authors.forename: C
authors.initials: C
authors.lastname: Ell
authors.forename: E G
authors.initials: EG
authors.lastname: Hahn
mesh_terms: D000328:Adult; D000368:Aged; D004568:Electrodiagnosis; D005069:Evaluation Studies as Topic; D005215:Fasting / Q000502:physiology; D005260:Female; D005769:Gastrointestinal Motility / Q000502:physiology*; D006801:Humans; D008365:Manometry; D008875:Middle Aged; D019518:Postprandial Period / Q000502:physiology; D011446:Prospective Studies; D011706:Pyloric Antrum / Q000000981:diagnostic imaging / Q000502:physiology; D012595:Scleroderma, Systemic / Q000503:physiopathology*; D013270:Stomach / Q000000981:diagnostic imaging / Q000502:physiology*; D013997:Time Factors; D014463:Ultrasonography