It has emerged that Huawei has received medical certification in China for ECG and blood pressure sensors intended for smartwatches. The company is expected to bring both to the Watch D, which is due before the end of the year.
https://www.notebookcheck.net/Huawei-receives-medical-device-certification-for-blood-pressure-and-ECG-sensors-ahead-of-Watch-D-release.571818.0.html