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Korean J Neuromuscul Disord > Volume 12(2); 2020 > Article
Korean Journal of Neuromuscular Disorders 2020;12(2):32-35.
DOI: https://doi.org/10.46518/kjnmd.2020.12.2.32    Published online December 31, 2020.
Usefulness of Squatting Combined with the Blood Pressure Measurement for Orthostatic Intolerance in Dizziness Clinic
Hoseong Seo1, Sooyoung Kim1,2, Eun Hee Sohn1, Seong-Hae Jeong1
1Department of Neurology, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea
2Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Korea
기립불능증에서 기립경사 검사와 웅크림 혈압 측정의 유용성
서호성1, 김수영1,2, 손은희1, 정성해1
1충남대학교 의과대학 충남대학교병원 신경과
2분당서울대학교병원 신경과
Correspondence:  Seong-Hae Jeong, Tel: +82-42-280-8057, Fax: +82-42-252-8654, 
Email: mseaj1081@gmail.com
Received: 11 October 2020   • Revised: 10 December 2020   • Accepted: 15 December 2020
Orthostatic intolerance (OI) is a common clinical symptom in dizziness clinic. The head-up tilt table test (HUT) is one of the primary clinical examination for evaluating OI. There is no consensus on the optimum method for diagnosis of orthostatic hypotension (OH). Herein, we performed the additional squat combined with blood pressure (BP) monitoring for OI patients with normal HUT.
The study included 32 consecutive patients with orthostatic intolerance for 3 months since April, 2018 (Period I) and 27 patients with orthostatic intolerance for 3 months since April, 2019 (Period II) in dizziness clinic of Chungnam National University Hospital. During Period II, the additional squat combined with BP test was performed for normal HUT results in patients with OI. In squat combined orthostatic BP measurement, the first BP measurement was taken following 3 minutes of rest at the squat position; afterwards the patients were raised upright and the measurement was monitored for 2 minutes, using a continuous beat-to-beat BP monitoring.
In this study, there was significant difference in OH diagnosis (p<0.001); 40.6% (13/32) by conventional HUT (Period I) vs. 92.5% (25/33) by conventional HUT and additional squat test for normal HUT (Period II). In patients with normal HUT, the positive OH was 86.7% (13/15) by the additional squat combined BP measurement (Period II).
In addition to HUT, squat test combined with BP measurement might be more informative for understanding and diagnosing the OH, particularly in patients with OI and normal HUT in dizziness clinic.
Key Words: Orthostatic intolerance, Tilt table test


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