About: http://webisa.webdatacommons.org/239396382

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Any conventional means may be used to determine AR. For example, the P-P interval may be measured and averaged over the previous n cardiac cycles, where n is an integer, such as 5.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com