一种使用头部心冲击图（BCG）和头部心电图（ECG）的连续、可穿戴且无线的心脏监测器。

A continuous, wearable, and wireless heart monitor using head ballistocardiogram (BCG) and head electrocardiogram (ECG).

作者信息

Da He David, Winokur Eric S, Sodini Charles G

机构信息

Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

出版信息

Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:4729-32. doi: 10.1109/IEMBS.2011.6091171.

DOI:10.1109/IEMBS.2011.6091171

PMID:22255394

Abstract

Continuous and wearable heart monitoring is essential for early detection and diagnosis of cardiovascular diseases. We demonstrate a continuous, wearable, and wireless heart monitor that is worn at the ear. The device has the form factor of a hearing aid and is wirelessly connected to a PC for data recording and analysis. With the ear as an anchoring point, the heart monitor measures the ballistocardiographic (BCG) motion of the head using a MEMS tri-axial accelerometer, which is an electrode-less method to measure heart rate. Additionally, electrocardiogram (ECG) is measured locally near the ear using a single-lead configuration. The peak timing delay between the head ECG and the head BCG, or RJ interval, can be extracted in the presence of noise using cross-correlation. The RJ interval is shown to correlate to the heart's pre-ejection period during both Valsalva and whole-body tilt maneuvers.

摘要

连续可穿戴式心脏监测对于心血管疾病的早期检测和诊断至关重要。我们展示了一种佩戴在耳朵上的连续、可穿戴且无线的心脏监测器。该设备具有助听器的外形尺寸，并通过无线方式连接到个人电脑进行数据记录和分析。以耳朵作为固定点，心脏监测器使用MEMS三轴加速度计测量头部的心冲击图（BCG）运动，这是一种无电极测量心率的方法。此外，使用单导联配置在耳朵附近局部测量心电图（ECG）。在存在噪声的情况下，可以使用互相关提取头部心电图和头部BCG之间的峰值时间延迟，即RJ间期。结果表明，在瓦尔萨尔瓦动作和全身倾斜动作期间，RJ间期与心脏的射血前期相关。