No idea, but I would look in EASA Part-MED to find out.
Two parts to this. First is the decision of the EC which lays down the law, but is sometimes vague:
http://eur-lex.europa.eu/LexUriServ/...01:0049:EN:PDF
A lot of implementation details are left to EASA. For this, EASA publishes Accepted Means of Compliance (which are basically specific interpretations of the law) and Guidance Material (which is just good advice with no legal value):
Here are all the current AMCs, GMs and such for all parts that EASA has implemented so far:
EASA - Acceptable Means of Compliance and Guidance Material
And this is the Part-MED document:
http://easa.europa.eu/agency-measure...bin%20crew.pdf
In that last document, the cardiovascular stuff starts on page 9.