Abstract 12159: Trends in Subsequent Myocardial Infarction Hospitalizations and Inpatient Mortality Among Cancer Patients With Prior Myocardial Infarction

Abstract

Background: Patients hospitalized with subsequent/recurrent myocardial infarction (MI) suffer from high morbidity and mortality burden. Owing to the lack of contemporary data on cancer patients, we aimed to study the trends of subsequent Mi in this population. recurrent MI admissions and mortality in patients with prior history of MI and active cancer diagnoses. Methods: The National Inpatient Sample (2016-2019) was queried to identify adults with an active cancer diagnosis and prior MI hospitalization for subsequent MI admissions. Primary outcomes were nationwide trends in subsequent MI admissions and in-hospital mortality with sex and racial disparities. Trend analysis was performed by linear-by-linear regression method. Results: Cancer patients with prior MI (n=470755, median age 75 [IQ 67-82 years]) had 5.6% (26320) subsequent MI admissions. Subsequent MI hospitalizations mostly had male (69.3%), white (81.5%), enrolled in Medicare (81.1%), and South (31.1%) region admissions. Subsequent MI patients had higher complicated hypertension (58.4 vs 39.3%), diabetes with chronic complications (33 vs 21.4%), drug abuse (2.3 vs 1.4%) and obesity (13.6 vs 10.6%) than patients without subsequent MI. Subsequent MI admissions had a declining trend from 2016 to 2019 for both sex and all races except Hispanics (p trend <0.05) [Fig. 1a]. All-cause in-hospital mortality showed a significant declining trend for males (p trend <0.05), but a marginal increase was seen in females [Fig. 1b]. Furthermore, stratified by race, no significant change in mortality trend was noticed. Conclusion: There were declining trends in subsequent MI hospitalizations in cancer patients with prior MI in all sex/racial groups except in Hispanics. Males had improved outcomes in terms of in-hospital mortality, however, this improvement was not evident in females and on racial stratification.