Department of Fixed Prosthodontics, Osaka University, Osaka, Japan.
Int J Prosthodont. 2013 May-Jun;26(3):239-43. doi: 10.11607/ijp.3305.
To investigate the hypothesis that sleep bruxism (SB) events could be predicted by an increase in heart rate.
Fourteen sleep bruxers were recruited. Each participant recorded his or her own electromyography (EMG) and electrocardiography (ECG) at home for 2 consecutive nights using a portable telemetry system. Ten heartbeats before (B10 to B1) and three heartbeats after (A1 to A3) the onset of SB events were analyzed, and the threshold for the prediction of an SB event was determined. The validity of the threshold was tested by EMG and ECG recorded in the same manner for an additional night. The prediction accuracy of SB events was evaluated for sensitivity and specificity.
A gradual increase in heart rate was observed before an SB event, and B1, A1, A2, and A3 were significantly higher than B10 (P < .01). The threshold value was set at 110% when the mean of all heart rates of the second night of recording was set at 100%. A total of 324 SB events were observed and 299 were preceded by increased heart rate that exceeded the threshold (sensitivity, 92.3%). The total number of increased heart rate events was 1,239, and the total number of threshold applications was estimated to be 120,000. The specificity was 99.2%.
Over 90% of SB events could be predicted by an increasing heart rate of 110%. Since the sensitivity and specificity were extremely high, the hypothesis that SB events could be predicted by increased heart rate was positively verified.
研究睡眠磨牙症（SB）事件是否可通过心率增加来预测的假说。
招募了 14 名睡眠磨牙症患者。每位参与者使用便携式遥测系统在家中连续记录了自己的肌电图（EMG）和心电图（ECG）两个晚上。分析了 SB 事件发作前的 10 个心跳（B10 到 B1）和 3 个心跳（A1 到 A3），并确定了预测 SB 事件的阈值。通过以相同方式记录的另一个晚上的 EMG 和 ECG 来测试该阈值的有效性。评估了 SB 事件的预测准确性，以确定灵敏度和特异性。
在 SB 事件之前观察到心率逐渐增加，B1、A1、A2 和 A3 均明显高于 B10（P <.01）。当将记录的第二天晚上所有心率的平均值设置为 100%时，阈值设定为 110%。共观察到 324 次 SB 事件，其中 299 次在超过阈值的心率增加之前发生（灵敏度为 92.3%）。总共出现了 1,239 次心率增加事件，而阈值应用的总数估计为 120,000 次。特异性为 99.2%。
超过 90%的 SB 事件可以通过增加 110%的心率来预测。由于灵敏度和特异性极高，因此可以证实心率增加可以预测 SB 事件的假说。
