A dataset of simultaneous collected ECG and PPG signals

The dataset contains 444 physiological recordings and 148 reference values (simultaneous acquisition of dual-wavelength PPG signals with 1-leadECG signals,cuffed blood pressure values) from 148 subjects in three different exercise states.The dataset is designed to support cuffless blood pressure estimation, PPG signal analysis, PPG signal reconstruction of ECG signals, and wearable health technology robustness in wearable devices,development of cardiovascular monitoring technologies. All data were collected with informed consent and institutional medical ethics approval was obtained." information.csv", records basic information for all subjects, including unique identification IDs age, gender, height, weight, SBP, DBP, and HR.The The dataset consists of two folders. The Raw_Data folder contains the original data files collected in csv format. Each file includes four signal segments. The first column, labeled ECG_I, stores the original ECG signal. The second column, labeled PPG_RED, stores the original PPG signal measured in red light. The second column, labeled PPG_RED, stores the original PPG signal measured in red light. The third column, labeled PPG_IR, stores the original PPG signal measured in infrared light. Fourth column is a string labeled {'Hz': 250}; it does not contain signal data and only records the sampling rate. Note that files in the Raw_Data folder span more than 180 s of recording and exceed 45,000 samples. The files in the Filtered_Data folder are csvs exported by the self-developed host computer software. Each file contains five signal segments. Column 1, ECG_I_Filtered, stores the filtered ECG signal. Column 2, ECG_I_mv, stores the ECG signal converted to millivolts and is of floating-point type. Column 3, PPG_RED_Filtered, stores the filtered red PPG signal and is floating-point. Column 4, PPG_IR_Filtered, stores the filtered infrared PPG signal and is floating-point. Column 5 stores the sampling rate and the ECG voltage conversion formula.Note that some subjects in the Filtered_Data folder have less than 180 s of filtered data (fewer than 45,000 samples) because of the equipment used during measurement. In both the Raw_Data and Filtered_Data folders, file names follow the format 000_x, where "000" denotes the subject ID and "x" denotes the subject's state during acquisition; "x" takes the values 1, 2, or 3, which correspond to three different states. Thus, each ID has three csv waveform files, for example 001_1.csv, 001_2.csv, and 001_3.csv, representing synchronized PPG and ECG signals recorded under three different conditions. Note that blood pressure was measured only in the resting state and not after exercise; therefore, blood pressure values appear only in the csv file ending with "_1" for each ID.本数据集包含148名受试者在三种不同运动状态下的444条生理记录与148组参考值，其中同步采集了双波长光电容积描记（PPG, Photoplethysmography）信号、单导联心电图（ECG, Electrocardiography）信号以及袖带式血压值。本数据集旨在支撑无袖带血压估计、PPG信号分析、基于PPG的ECG信号重建，以及可穿戴设备中可穿戴健康技术的鲁棒性研究、心血管监测技术的开发。 所有数据采集均已获得受试者知情同意，并取得了机构医学伦理审查批准。 information.csv文件记录了所有受试者的基础信息，包括唯一标识ID、年龄、性别、身高、体重、收缩压（SBP, Systolic Blood Pressure）、舒张压（DBP, Diastolic Blood Pressure）以及心率（HR, Heart Rate）。 本数据集包含两个文件夹：原始数据（Raw_Data）文件夹内为采集得到的CSV格式原始数据文件，每个文件包含四段数据：第一列标注为ECG_I，存储原始ECG信号；第二列标注为PPG_RED，存储红光采集的原始PPG信号；第三列标注为PPG_IR，存储红外光采集的原始PPG信号；第四列为字符串{'Hz': 250}，不包含信号数据，仅记录采样率。需注意，原始数据文件夹内的单条文件记录时长超过180秒，样本量超过45000条。 滤波后数据（Filtered_Data）文件夹内的文件为自研上位机软件导出的CSV文件，每个文件包含五段数据：第一列ECG_I_Filtered存储滤波后的ECG信号；第二列ECG_I_mv存储转换为毫伏单位的ECG信号，为浮点型数据；第三列PPG_RED_Filtered存储滤波后的红光PPG信号，为浮点型数据；第四列PPG_IR_Filtered存储滤波后的红外PPG信号，为浮点型数据；第五列存储采样率与ECG电压转换公式。需注意，由于测量过程中使用的设备存在差异，滤波后数据文件夹内部分受试者的滤波数据时长不足180秒，样本量少于45000条。 两个文件夹内的文件名均遵循000_x的格式，其中"000"代表受试者ID，"x"代表采集时的受试者状态，x可取1、2、3，分别对应三种不同状态。因此每个ID对应三个CSV波形文件，例如001_1.csv、001_2.csv和001_3.csv，代表三种不同条件下同步记录的PPG与ECG信号。 需注意，血压仅在静息状态下测量，运动后未采集血压值，因此血压值仅出现在每个ID以"_1"结尾的CSV文件中。