原发性高血压患者24 h动态心电图心率减速力与心率变异性的相关性研究

目的探讨原发性高血压(EH)患者心率减速力(DC)特点,分析其与心率变异性(HRV)各时域指标的相关性,以及对自主神经功能的评估价值。方法前瞻性选择2018年1月至2020年6月合肥市滨湖医院收治的78例EH患者,作为EH组。另选取同期体检的50位健康志愿者,作为对照组。2组均接受24 h动态心电图监测,比较2组DC值和HRV时域指标[窦性R-R间期标准差(SDNN)、差值均方根(RMSSD)和相邻R-R间期差值>50 ms心搏百分比(pNN50)];依据DC值进行猝死危险分层,将EH组分为高危组(DC≤2.5 ms)和非高危组(DC≥2.6 ms)比较2组HRV时域指标差异;分析DC与HRV各时域指标的相关性。结果EH组DC、SDNN、RMSSD、pNN50分别为(4.83±1.27)ms、(109.26±21.03)ms、(38.74±9.38)ms、(5.12±0.95)%,均明显低于对照组的(6.19±1.42)ms、(132.07±28.54)ms、(52.65±11.32)ms、(7.83±1.42)%,差异均有统计学意义(P<0.05);高危组DC、SDNN、RMSSD、pNN50分别为(2.42±0.07)ms、(87.39±10.23)ms、(32.57±8.15)ms、(4.26±1.02)%,均明显低于非高危组的(5.27±1.26)ms、(113.24±20.15)ms、(39.86±10.47)ms、(5.28±1.27)%,差异均有统计学意义(P<0.05);Pearson法分析显示,EH患者DC与SDNN、RMSSD、pNN50水平均呈正相关(r=0.637、0.652、0.709,P<0.05)。结论EH患者DC明显下降,且和HRV呈正相关,可协同作为自主神经功能和猝死风险的评估筛查指标。     

A unique case of bradycardia recognized by wearable technology as first presentation of complete heart block

Wearable technology has advanced significantly, and the proposed health benefits have been widely touted. Most of the discussion has been surrounding the identification and diagnosis of asymptomatic atrial fibrillation. However, the heart monitoring functions of the wearable technology can also identify other abnormalities as well. We present the first case of wearable technology identified bradycardia diagnosed as the primary presentation of complete heart block. Wearable technology has advanced significantly, but still poses questions regarding its use in screening for rare conditions. One remaining challenge is balancing the desire to screen for rare asymptomatic conditions without overburdening emergency departments with patients responding to alarms on their devices.