-Original-

Long-term Hemodialysis Corrects Left Ventricular Dyssynchrony in End-stage Renal Disease: A Study with Gated Technetium-99m Sestamibi Myocardial Perfusion Single-photon Emission Computed Tomography

Naoto Takahashi¹, Naoki Sato¹, Masahiro Ishikawa¹, Arifumi Kikuchi¹, Daisuke Hanaoka¹, Shiro Ishihara¹, Kenichi Amitani¹, Naoyuki Sakai², Shin-ichiro Kumita³ and Wataru Shimizu⁴

¹Department of Cardiology, Nippon Medical School Musashi Kosugi Hospital
²Department of Nephrology, Nippon Medical School Musashi Kosugi Hospital
³Department of Radiology, Nippon Medical School Hospital
⁴Department of Cardiovascular Medicine, Nippon Medical School Hospital

Introduction: Left ventricular (LV) dyssynchrony is common in patients with end-stage renal disease (ESRD), and echocardiographic assessment has shown that it can be improved by a single session of hemodialysis (HD). The aim of this study was to assess the effects of chronic HD on LV dyssynchrony in patients ESRD by means of gated technetium-99m sestamibi myocardial perfusion single-photon emission computed tomography (GSPECT) with phase analysis.
Materials and Methods: Twelve patients with ESRD underwent GSPECT and echocardiography before the start of long-term HD (baseline) and 3 months later. In addition, 7 control subjects matched for age and sex underwent GSPECT and echocardiography within a 2-month period. To evaluate LV dyssynchrony, both histogram bandwidth (HBW) and phase standard deviation (PSD) were determined with phase analysis of GSPECT images. The end-diastolic volume (EDV), end-systolic volume (ESV), and ejection fraction were also measured with GSPECT, and the LV mass index (LVMI) was measured with echocardiography. The LV dyssynchrony, volume, function, and mass were compared among control subjects, patients with ESRD at baseline, and patients with ESRD after 3 months of chronic HD.
Results: The LV dyssynchrony, volume, and mass at baseline were significantly greater in patients with ESRD than in control subjects (HBW, 65.5°±54.4° vs. 22.3°±7.5°, P<0.05; PSD, 21.0°±15.5° vs. 7.6°±5.5°, P<0.05; EDV, 105.7±29.2 vs. 72.3±13.9 mL, P<0.05; ESV, 44.3±22.1 vs. 20.9±10.3 mL, P<0.05; LVMI, 136.5±48.3 vs. 65.4±5.6 g/m², P<0.01). From baseline to the third month of chronic HD, there were significant increases in EDV (78.6±25.4 vs. 105.7±29.2 mL, P<0.01) and ESV (27.6±16.2 vs. 44.3±22.1 mL, P<0.01) and significant decreases in HBW (65.5°±54.4° vs. 31.0°±15.7°, P<0.01) and PSD (21.0°±15.5° vs. 10.0°±8.2°, P<0.01).
Conclusion: Chronic HD decreased LV dyssynchrony and volume in patients with ESRD. Serial phase analysis of GSPECT images is a useful method of assessing the effects of long-term HD on LV dyssynchrony and volume in patients with ESRD.

J Nippon Med Sch 2015; 82: 76-83

Keywords
left ventricular dyssynchrony, phase analysis, gated technetium-99m sestamibi myocardial perfusion single-photon emission computed tomography, end-stage renal disease, chronic hemodialysis

Correspondence to
Naoto Takahashi, MD, Division of Cardiology, Department of Internal Medicine, Nippon Medical School Musashi Kosugi Hospital, 1-396 Kosugi-cho, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
yukkie@nms.ac.jp

Received, October 27, 2014
Accepted, December 8, 2014