About: http://webisa.webdatacommons.org/319327261

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	If necessary, intravenous short-acting beta-blockers (eg, 5-20 mg of metoprolol) are administered before acquisition unless there is contraindication such as congestive heart failure, asthma or atrioventricular block.
http://www.w3.org/ns/prov#wasQuotedFrom	biomedsearch.com