Ubiquitous computing refers to "information technology and computer power, which in principle pervade all everyday objects" (see Friedewald and Raabe, 2010). A similar form is wearable computing, where the computing device is placed on a persons cloth/body. This topic currently gets much attention: smart watches (e.g., Apple) or glasses (e.g., google glass).
I'm interested in the topic of wearable e-health systems. As I'm just getting started with my research in this area, I'd like to ask for recommendations for good review papers, journals etc. to be used as a starting point.
The European Union has a special policy for eHealth, including various initiatives. Wearable systems  allow for light-weighted, cost-effective, 24h patient monitoring - especially for elderly people - that does not interfere with everyday life.
I am specifically interested in the display and monitoring of clinical relevant biosignals, for instance heart activity measured by ECG, oxygen staturation measured by puls oxygen meters. I am not intersted in patient records, health information systems, patient medication monitoring, privacy, security, compliance, etc., which are also part of eHealth.
A quick search revealed the following references.
Chan, Marie, et al. "Smart wearable systems: Current status and future challenges." Artificial intelligence in medicine 56.3 (2012): 137-156.
Mosa, Abu Saleh M., Illhoi Yoo, and Lincoln Sheets. "A systematic review of healthcare applications for smartphones." BMC medical informatics and decision making 12.1 (2012): 67.
Wearable eHealth devices:
Chung, Wan-Young, Young-Dong Lee, and Sang-Joong Jung. "A wireless sensor network compatible wearable u-healthcare monitoring system using integrated ECG, accelerometer and SpO 2." Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE. IEEE, 2008.
Watanabe, Hyuma, et al. "Wearable ECG Monitoring and Alerting System Associated with Smartphone: iHeart." International Journal of E-Health and Medical Communications (IJEHMC) 4.4 (2013): 1-15.
Further topics: there are more specific topic like papers on sensors, security & privacy, protocols & wireless networks, signal analysis & diagnosis from biomedical signals, etc.
Pantelopoulos, Alexandros, and Nikolaos G. Bourbakis. "A survey on wearable sensor-based systems for health monitoring and prognosis." Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions on 40.1 (2010): 1-12.
What are your recommendations for papers in the area of technical aspects of wearable e-health systems, specifically the monitoring and display of biosignals such as those of the cardiovascular system excluding the aspect of security, privacy or compliance?