基于椅子的心冲击图时间间隔测量与心血管激发试验
A chair based ballistocardiogram time interval measurement with cardiovascular provocations.
作者信息
Rajala Satu, Ahmaniemi Teemu, Lindholm Harri, Muller Kiti, Taipalus Tapio
出版信息
Annu Int Conf IEEE Eng Med Biol Soc. 2018 Jul;2018:5685-5688. doi: 10.1109/EMBC.2018.8513455.
The objective of this study was to measure ballistocardiogram (BCG) based time intervals and compare them with systolic blood pressure values. Electrocardiogram (ECG) and BCG signals of six subjects sitting in a chair were measured with a ferroelectret film sensor. Time intervals between ECG R peak and BCG I and J waves were calculated to obtain RJ, RI and IJ intervals. The time intervals were modified with two cardiovascular provocations, controlled breathing and Valsalva maneuver. The controlled breathing changed all the time intervals (RJ, RI and IJ) whereas the Valsalva maneuver mainly caused variations in the RJ and RI intervals. The calculated time intervals were compared with reference arterial blood pressure values. Correlation coefficients of r = -0.61 and r = -0.78 were found between the RJ and RI time intervals and systolic blood pressure during Valsalva maneuver, respectively.
本研究的目的是测量基于心冲击图（BCG）的时间间隔，并将其与收缩压值进行比较。使用铁电驻极体薄膜传感器测量了六名坐在椅子上的受试者的心电图（ECG）和BCG信号。计算心电图R波峰与BCG的I波和J波之间的时间间隔，以获得RJ、RI和IJ间隔。通过两种心血管激发试验（控制呼吸和瓦尔萨尔瓦动作）对时间间隔进行修正。控制呼吸改变了所有时间间隔（RJ、RI和IJ），而瓦尔萨尔瓦动作主要导致RJ和RI间隔的变化。将计算出的时间间隔与参考动脉血压值进行比较。在瓦尔萨尔瓦动作期间，RJ和RI时间间隔与收缩压之间的相关系数分别为r = -0.61和r = -0.78。
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