ecg-polar-h10-set2

Single-lead ECG tracings along with heart rate and 3-axis chest actigraphy using a Polar H10 sensor worn with on a Polar Pro chest strap, with data transferred via bluetooth to an Android smartphone (Realme 6i) that serves as a bluetooth receptor unit and data recorder via the Polar Sensor Logger app on Android by Jukka Happonen (Polar developer, this app is unofficial): https://play.google.com/store/apps/details?id=com.j_ware.polarsensorlogger Data was compressed with 7-zip using LZMA2 in Normal compression setting and split into 5GB parts to respect the file size limit of figshare. Total is 3 GB compressed, 20 GB uncompressed. This dataset covers the period from 2021-01-21 to 2021-04-21. There is some overlap with the set1 to ease download, as this set starts at the same period other wearables were finished being ironed out. See other sets for further data. This wearable was only worn when at home. Each file represents one acquisition session, of variable time up to 140h in one session. The acquisition software also split files when the device is temporarily out of reach, so there several files with very few entries, which means the device was barely reachable or went in and out of bluetooth range. These files can be concatenated to study a longer time period. There are 4 types of files: ECG for the raw ECG at 133Hz sampling rate, HR for the heart-rate computed by the proprietary Polar embedded software in the H10 sensor and also the IBI (inter-beats intervals) to ease calculation of HRV (heart rate variability), ACC for the 3-axis (accelerometer = translation axes) chest actigraphy set at 100Hz sampling rate and 4g sampling resolution, and Marker which are manual markers by the operator to mark special temporal events but they were not used for this study so they are either deleted or empty. For the full technical specification of the Polar H10 device, see: https://github.com/polarofficial/polar-ble-sdk/tree/master/technical_documentation本数据集包含单导联心电图（ECG）波形数据，以及搭配Polar Pro胸带佩戴的Polar H10传感器采集的三轴胸部活动记录仪数据，数据通过蓝牙传输至作为蓝牙接收与记录终端的安卓智能手机（Realme 6i），并由Polar公司开发者尤卡·哈波宁（Jukka Happonen）开发的非官方安卓应用Polar Sensor Logger完成数据记录，该应用的下载地址为：https://play.google.com/store/apps/details?id=com.j_ware.polarsensorlogger。数据集采用7-Zip以LZMA2算法、标准压缩模式进行压缩，并拆分为单文件不超过5GB的分卷压缩包以符合Figshare的文件大小限制，压缩后总容量为3GB，解压后总容量为20GB。本数据集的覆盖时段为2021年1月21日至2021年4月21日。为便于下载，本数据集与set1存在部分重叠，因本数据集的起始时段与其他可穿戴设备完成调试的时段一致。该可穿戴设备仅在居家场景下佩戴。每个文件对应一次采集会话，单次会话的最长时长可达140小时。当设备暂时超出蓝牙通信范围时，采集软件会自动拆分文件，因此存在部分仅包含极少量数据条目的文件——此类情况对应设备几乎无法被蓝牙连接，或频繁进出蓝牙覆盖范围。此类文件可进行合并，以开展更长时间跨度的研究。本数据集包含4类文件：1. ECG文件：采样率为133Hz的原始心电图数据；2. HR文件：由Polar H10传感器内置专有软件计算得到的心率数据，同时包含心搏间期（inter-beats intervals, IBI）以简化心率变异性（heart rate variability, HRV）的计算流程；3. ACC文件：采样率为100Hz、采样分辨率为4g的胸部三轴加速度计（accelerometer）活动数据；4. 标记（Marker）文件：由操作人员手动标记的特殊时间事件标记，但本研究未使用此类数据，因此该类文件要么已被删除，要么为空。如需查看Polar H10设备的完整技术规范，请访问：https://github.com/polarofficial/polar-ble-sdk/tree/master/technical_documentation