title: Relationship between P-wave dispersion and effective hemodialysis in chronic hemodialysis patients.
abstract: OBJECTIVE
  To investigate whether or not P-wave dispersion (PWD) can be used as a good indicator of effective hemodialysis.
  
  
  METHODS
  The study included 35 patients (20 males, 15 females, mean age 61 +/- 10 years) who regularly received hemodialysis treatment for chronic renal failure. Following hemodialysis, the patients whose hemodynamic parameters were preserved and who reached dry body weight were included. Twelve-lead resting electrocardiogram (ECG) at a speed of 25-50 mm/s, the value of total body fluid (TBF) and bioelectric impedance using bipedal bioelectric impedance equipment were obtained before and immediately after hemodialysis. Blood samples were also taken for the assessment of blood electrolytes, urea and creatinine. PWD was defined as the difference between the maximum and minimum P-wave duration calculated on a standard 12-lead ECG before and after dialysis.
  
  
  RESULTS
  The following parameters were obtained before and after hemodialysis: blood pressure 132 +/- 21 vs. 130 +/- 10 mm Hg (p > 0.05), TBF 33.9 +/- 6 vs. 32 +/- 5.6 liters (p = 0.001), impedance 499 +/- 110 vs. 596 +/- 136 Omega (p = 0.001), P-max 103.1 +/- 8.9 vs. 106.3 +/- 12.7 ms (p > 0.05), P-min 70.2 +/- 11 vs. 72.5 +/- 7.9 ms (p > 0.05), PWD 32.2 +/- 11.9 vs. 33.8 +/- 13.4 ms (p > 0.05). Although statistically significant decreases were observed in urea and creatinine levels after hemodialysis, no such changes were observed in blood electrolytes.
  
  
  CONCLUSIONS
  The P-max and PWD did not change significantly after hemodialysis, hence these two parameters can be used as an indicator of effective hemodialysis.
authors.affiliation: Department of Cardiology, Gulhane Military Training Hospital, Haydarpasa Teaching Hospital, Istanbul, Turkey. drnamikozmen@yahoo.com
authors.forename: Namik
authors.initials: N
authors.lastname: Ozmen
authors.forename: Beker Sitki
authors.initials: BS
authors.lastname: Cebeci
authors.forename: Ejder
authors.initials: E
authors.lastname: Kardesoglu
authors.forename: Enes Murat
authors.initials: EM
authors.lastname: Atasoyu
authors.forename: Suat
authors.initials: S
authors.lastname: Unver
authors.forename: Turgay
authors.initials: T
authors.lastname: Celik
authors.forename: Mustafa
authors.initials: M
authors.lastname: Aparci
authors.forename: Mehmet
authors.initials: M
authors.lastname: Dincturk
mesh_terms: D001281:Atrial Fibrillation / Q000503:physiopathology*; D003404:Creatinine / Q000097:blood; D017097:Electric Impedance; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D007676:Kidney Failure, Chronic / Q000503:physiopathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis; D014508:Urea / Q000097:blood; D014882:Water-Electrolyte Balance
chemical_list: D014508:Urea; D003404:Creatinine