专业的心脏速率监视器IC克服心电噪声和功率的挑战

　　专业的心脏速率监视器IC克服心电噪声和功率的挑战

　　个人和远程医疗监控的可穿戴式心电图（ECG）设备的需求正在增加，并与它的准确性，可靠性和更长的电池寿命的要求。这挑战设计师心电图读数是高度敏感的运动和其他干扰源，和ECG信号的处理消耗了可用的电池电量。

　　提高可靠性和用户体验，可穿戴设备的设计者需要一个解决方案，可以提取，放大，滤波小生物信号，而功耗最小。为此，新的ECG心率监视器集成电路可以发挥核心作用，创造下一代心脏监测。

　　Taking the pulse of ECG requirements in wearables

　　An ECG measures heart rhythm and helps to diagnose cardiac issues in patients， including heart attack， poor blood flow to the heart， and other abnormal heart conditions.

　　The ECG records the electrical activity generated by heart muscle tissue. This activity produces a voltage， or “biopotential，” that spreads to the skin. Though the biopotential is in the microvolt range， it can be measured reliably in a noninvasive fashion using ECG electrodes attached to the skin.

　　Professional ECG systems can use up to 10 electrodes connected to the chest and limbs. Wearable ECG systems， such as chest straps and smart shirts， employ fewer electrodes and often use two or three electrode configurations. This approach reduces the footprint of ECG systems to increase the comfort level for patients， but comfort must be balanced with accuracy and reliability.