ORIGINAL ARTICLE

Comparison of classical and non-classical cardiovascular risk factors influencing the patency of native arteriovenous fistulas after percutaneous transluminal angioplasty therapy among haemodialysis patients

Jiung-Hsiun Liu, Po-Wen Lin, Yao-Lung Liu, Hsin-Hung Lin, Chiu-Ching Huang

Division of Nephrology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan

Correspondence to:
Correspondence to:
Dr Chiu-Ching Huang
Division of Nephrology, Department of Internal Medicine, China Medical University Hospital, No. 2, Yuh-Der Road, Taichung, 404, Taiwan; w0951{at}yahoo.com.tw

Objective: To evaluate the classical and non-classical cardiovascular risk factors that effect patency of native arteriovenous fistulas (AVF) in end stage renal disease (ESRD) patients who are undergoing regular haemodialysis treatment and have a percutaneous transluminal angioplasty (PTA) procedure.

Methods: All PTAs performed between 1 October 2002 and 30 September 2004 were identified from case notes and the computerised database and follow up to 31 March 2005. The definition of patency of AVF after PTA was including primary or secondary patencies. Risks were analysed to assess the influence on survival following PTAs of age, sex, serum cholesterol, serum triglyceride, diabetes, use of aspirin, current smoking and hypertension, serum albumin, serum calcium–phosphate product, intact parathyroid hormone (I-PTH), and urea reduction ratio (URR).

Results: The patency rate of AVFs of all interventions was 65% at 6 months. Factors with poor patencies of AVFs after PTA procedures were higher serum calcium–phosphate product (p = 0.033), higher URR (p<0.001), lower serum albumin (p<0.001), non-hypertension (p = 0.010) and "non-smoker + ex-smoker group" (p = 0.033). The hypertensive patients and current smokers had lower patency failure after PTAs (p<0.01 and p<0.05, respectively).

Conclusions: Unfavourable cumulative patency rates are observed in haemodialysis patients with higher URR, higher serum calcium–phosphate product and hypoalbuminaemia (lower serum albumin before the PTA procedure). Hypertension and current smoking were associated with better patency rates of AVF after PTA.

Abbreviations: AVF, arteriovenous fistula; BCP, bromcresol purple; BUN, blood urea nitrogen; ESRD, end stage renal disease; I-PTH, intact parathyroid hormone; MIA, malnutrition, inflammation, and atherosclerosis; PTA, percutaneous transluminal angioplasty; PTFE, polytetrafluoroethylene; PTH, parathyroid hormone; URR, urea reduction ratio

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