Perhaps you should try some spelling variations:
"Cardiac arrest" » "Cardiac arrese", "Cardiac agrest", "Cardiac arrested"
"Cardiac arrestar" » "Cardiac arresear", "Cardiac agrestar", "Cardiac arrestedar", "Cardiac arrestado", "Cardiac prestar"
"Cardiac arresto" » "Cardiac arreseo", "Cardiac agresto", "Cardiac arrestedo"
"Cardiac arreseo" » "Cardiac arrese", "Cardiac arrested"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("Cardiac arrest") OR ("Cardiac arrestar"))) OR ((("Cardiac arresto") OR ("Cardiac arreseo"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Cardiac arrest\") OR (\"Cardiac arrestar\"))) OR (((\"Cardiac arresto\") OR (\"Cardiac arreseo\"))))".
• Removing quotes may allow a broader search: (((( Cardiac arrest ) OR ( Cardiac arrestar ))) OR ((( Cardiac arresto ) OR ( Cardiac arreseo )))).
• Adding a wildcard symbol may retrieve word variants: (((("Cardiac arrest") OR ("Cardiac arrestar"))) OR ((("Cardiac arresto") OR ("Cardiac arreseo"))))*.