patients with primary noncardiac diagnoses is rising in the United States, but no national
data currently exist. We examined changes in primary noncardiac diagnoses among elderly
patients admitted to a CICU during the past decade. Methods and Results—Using 2003 to
2013 Medicare data, we grouped elderly patients admitted to CICUs into 2 categories based
on principal diagnosis at discharge:(1) primary noncardiac diagnoses and (2) primary …