Otoyama Ippo, Suematsu Yasunori, Teshima Reiko, Fujita Masaomi, Nishimura Shigenori, Aramaki Ayaka, Fujimi Kanta, Wada Hideichi, Kamada Satoshi, Miura Shin-Ichiro
Department of Rehabilitation, Fukuoka University Hospital, Fukuoka, Japan.
These authors contributed equally.
Cardiol Res. 2025 Jul 28;16(4):366-372. doi: 10.14740/cr2089. eCollection 2025 Aug.
It has been reported that weight bearing index (WBI) is associated with rehabilitation; however, there are few reports about its association with the length of hospital stay in patients who have undergone cardiac surgery.
We registered 108 patients who did not have preoperative contraindication of exercise and underwent both cardiac surgery and cardiac rehabilitation from April 2017 to May 2022 at Fukuoka University Hospital. We excluded seven patients whose hospital stays were prolonged due to severe infection or unstable hemodynamics after cardiac surgery. We investigated patient background, laboratory, respiratory, and echocardiographic examinations, physical functions, periprocedural complications, and postoperative outcomes. We divided the patients into two groups according to a cutoff value for walking (0.45 kgf/kg WBI).
The patients' age was 69 (59 - 75) years, the percentage of males was 74.1% (n = 80), and their body mass index (BMI) was 23.4 ± 3.5 kg/m. The low WBI group consisted of 48 patients and the preserved WBI group consisted of 60 ones. The patients in the low WBI group showed a lower percentage of male. With regard to physical functions, grip strength, one-leg standing time, the Short Physical Performance Battery score, 10-m walking speed, walking distance for 2 min both pre- and post-cardiac surgery in the low WBI group were significantly low. After cardiac surgery, the New York Heart Association (NYHA) classification was high, and the strength of exercise tolerance at discharge was low in the low WBI group. There were no significant differences in the progression of cardiac rehabilitation until walking between the groups, but the length of hospital stay in the low WBI group was significantly long. WBI was an independent predictor of the length of hospital stay in a logistic regression analysis.
Preoperative WBI was associated with physical functions, NYHA classification, and length of hospital stay. Preoperative WBI could be a simple marker for detecting postoperative outcomes.
据报道，负重指数（WBI）与康复相关；然而，关于其与心脏手术后患者住院时间的关联报道较少。
我们纳入了2017年4月至2022年5月在福冈大学医院接受心脏手术和心脏康复且无术前运动禁忌证的108例患者。我们排除了7例因心脏手术后严重感染或血流动力学不稳定而延长住院时间的患者。我们调查了患者的背景、实验室检查、呼吸和超声心动图检查、身体功能、围手术期并发症及术后结局。我们根据步行的临界值（0.45 kgf/kg WBI）将患者分为两组。
患者年龄为69（59 - 75）岁，男性比例为74.1%（n = 80），体重指数（BMI）为23.4 ± 3.5 kg/m²。低WBI组有48例患者，保留WBI组有60例患者。低WBI组患者中男性比例较低。在身体功能方面，低WBI组的握力、单腿站立时间、简短体能测试电池评分、10米步行速度、心脏手术前后2分钟步行距离均显著较低。心脏手术后，低WBI组的纽约心脏协会（NYHA）分级较高，出院时运动耐量强度较低。两组之间在步行前心脏康复进展方面无显著差异，但低WBI组的住院时间显著延长。在逻辑回归分析中，WBI是住院时间的独立预测因素。
术前WBI与身体功能、NYHA分级及住院时间相关。术前WBI可能是检测术后结局的一个简单指标。
