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 arrestado"
"Cardiac arresear" » "Cardiac arriesgar", "Cardiac arrese", "Cardiac arrasar"

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