Home About us Current issue Back issues Submission Instructions Advertise Contact Login   

Search Article 
Advanced search 
Saudi Journal of Kidney Diseases and Transplantation
Users online: 188 Home Bookmark this page Print this page Email this page Small font sizeDefault font size Increase font size 

ORIGINAL ARTICLE Table of Contents   
Year : 2008  |  Volume : 19  |  Issue : 1  |  Page : 47-53
Electrocardiography and Serum Potassium before and after Hemodialysis Sessions

1 Department of Medicine, College of Medicine, King Saud University, Saudi Arabia
2 Division of Nephrology and Division of Cardiology, College of Medicine, King Saud University, Saudi Arabia

Correspondence Address:
Nauman Tarif
17-B, Fort Villas, New Iqbal Park, Lahore cantt, Pakistan

Login to access the Email id

PMID: 18087122

Rights and Permissions

This study was undertaken to assess potassium level and electrocardiographic (ECG) changes post hemodialysis and whether fall in potassium level during dialysis may potentiate cardiac arrythemia. We studied 21 chronic hemodialysis (HD) patients who had their serum electrolytes measured before and immediately after dialysis session, and ECG performed at the same time. The patients included 14 females and 7 males with a mean age of 53.1±15.6 years and range from 26 to 81 years; 9 (43%) patients were diabetics. All the patients had been on dialysis for a minimum of 6 months each Pre-HD serum potassium levels had no correlation with any ECG parameters except a negative correlation with the T wave amplitude r=-0.5, p=0.021. ECG parameters significantly changed post­HD; the T wave amplitude decreased, and the R wave amplitude increased. A comparatively higher R wave significantly decreased the T to R wave ratio post dialysis. The QRS duration and QTc interval also increased significantly. The patients with post-HD serum potassium of < 3.5 -in comparison to those with levels >3.5 mmol/L -had a higher R wave amplitude and a significantly less T to R wave ratio (11.8±9.7 vs 6.4±5.1, p=0.045 and 0.4±0.38 vs 1.0±0.97, p=0.049, respectively. In patients with serum potassium decrement of > 2.0 mmol/L, the T to R wave ratio decreased significantly, 0.32±0.21 vs 0.85 ±0.26, p=0.023; The T wave amplitude decreased more than the rise in R wave. Multiple regression analysis did not reveal any relationship of pre or post HD ECG changes and serum potassium, serum calcium or net change in serum potassium post-HD. We conclude that post-HD serum potassium decrement results in a decrease in T to R wave ratio on ECG; this change may have an arrhythmogenic potential.

Print this article  Email this article

  Similar in PUBMED
    Search Pubmed for
    Search in Google Scholar for
  Related articles
   Citation Manager
  Access Statistics
   Reader Comments
   Email Alert *
   Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded914    
    Comments [Add]    
    Cited by others 2    

Recommend this journal