The importance of muscle mass in predicting intradialytic hypotension in patients undergoing maintenance hemodialysis

Hyung Eun Son, Ji Young Ryu, Kyunghoon Lee, Young Il Choi, Myeong Sung Kim, Inwhee Park, Gyu Tae Shin, Heungsoo Kim, Curie Ahn, Sejoong Kim, Ho Jun Chin, Ki Young Na, Dong Wan Chae, Soyeon Ahn, Seung Sik Hwang, Jong Cheol Jeong

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Background: Patients undergoing hemodialysis are susceptible to sarcopenia. As intracellular reservoirs of water, skeletal muscles are important contributors to intradialytic hypotension. This study was designed to determine the role of skeletal muscle mass in intradialytic hypotension. Methods: In a cross-sectional study, the body composition of 177 patients was measured immediately after hemodialysis using bioelectrical impedance analysis. The parameters measured were skeletal muscle mass, intracellular and extracellular water contents, total body water, and cell-membrane functionality (in phase angle at 50 kHz). Data from laboratory tests, chest radiography, measurements of handgrip strength and mid-arm circumference, and questionnaires were collected. The main outcome was intradialytic hypotension, defined as more than two episodes of hypotension (systolic blood pressure of <90 mmHg) with intervention over the 3 months following enrollment. Logistic regression models including each parameter related to sarcopenia were compared with a clinical model. Results: Patients with a low ratio of skeletal muscle mass to dry body weight (SMM/WT) had a higher rate of intradialytic hypotension (40.7%). Most low-SMM/WT patients were female, obese, diabetic, and had a lower handgrip strength compared with the other patients. In the high-SMM/WT group, the risk of intradialytic hypotension was lower, with an odds ratio of 0.08 (95% confidence interval [CI], 0.02–0.28) and adjusted odds ratio of 0.06 (95% CI, 0.01–0.29). Conclusion: Measurement and maintenance of skeletal muscle can help prevent intradialytic hypotension in frail patients undergoing hemodialysis.

Original languageEnglish
Pages (from-to)611-622
Number of pages12
JournalKidney Research and Clinical Practice
Issue number5
StatePublished - Sep 2022


  • Body composition
  • Hypotension
  • Renal dialysis
  • Sarcopenia


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