So I have run across a heart rate and blood pressure monitor that connects to your iphone: Withings - The blood pressure monitor (self measurement, hypertension, monitoring).

I have also seen other references to the idea of being able to capture physiological readings in real time:
https://www.nytimes.com/2012/02/23/technology/personaltech/monitoring-your-health-with-mobile-devices.html
FDA OKs Sotera’s full wireless patient monitoring system | mobihealthnews

I wonder if anyone has tracked their heart rate and blood pressure during trading and how it has changed? Or is the stress such that it wouldn't show up in blood pressure or heart rate?

Check with @Gary.

Mike