Patient profiles on outcomes in patients hospitalized for heart failure: a 10-year history of the Malaysian population

Aims Heart failure (HF) affects an estimated 38 million people worldwide and is the leading cause of hospitalization among adults and the elderly. Evidence suggests that there may be regional and ethnic differences in the prevalence, outcomes and management of HF. The aim of this study was to understand the disease burden and treatment patterns of patients hospitalized for HF in multi-ethnic Malaysia. Methods and results A retrospective, non-interventional study was conducted utilizing 10 years of medical records from the National Heart Institute Malaysia (IJN) from 1 January 2009 to 31 December 2018. Of the 4739 patients in the IJN database, 3923 were eligible and were included in this analysis. The study recorded a high male prevalence (72.3%) with a mean age of 62.0 (+/- 13.26) years. The 30-day and 1-year rehospitalization rate was 6.8% and 24.7%, respectively. In-hospital mortality was 7.2% with 27.0% due to cardiovascular causes and 14.2% non-cardiovascular causes. The 30-day and 1-year rehospitalization rates were significantly higher in patients with lower systolic blood pressure (SBP, P < 0.001 and P = 0.002), diastolic blood pressure (DBP, P < 0.001 and P = 0.017), sodium (P < 0.001 and P = 0.029) and estimated glomerular filtration rate (eGFR, P < 0.001 and P = 0.002) and higher urea (P < 0.001 for both), serum creatinine (P < 0.001 and P = 0.003), and uric acid (P < 0.001 for both), respectively. Risk of hospitalization within 1 year varied significantly by ethnicity and was relatively higher in Indian (28.3%), followed by Malay (24.4%) and Chinese (21.9%; P = 0.008). In-hospital mortality within 1-year post-index date was higher in patients with lower weight (P = 0.002), body mass index (P = 0.009), SBP (P < 0.001), DBP (P < 0.001), sodium (P < 0.001), eGFR (P < 0.001) and higher heart rate (P = 0.039), urea (P < 0.001), serum potassium (P = 0.038), serum creatinine (P < 0.001), and uric acid (P < 0.001). In-hospital mortality within 1-year post-index date was also higher in patients with severe or end-stage chronic kidney disease (CKD) compared with mild/moderate CKD (P < 0.001) and in patients with HF with reduced ejection fraction (HFrEF) compared with those with mid-range or preserved ejection fraction (P < 0.001). The most commonly prescribed HF medications at discharge were loop diuretics (89.2%), beta-blockers (68.5%), mineralocorticoid receptor antagonists (56.2%), angiotensin-converting enzyme inhibitors (31.5%), and angiotensin receptor blockers (20.8%). Conclusions This study provides a greater understanding of the characteristics, treatment patterns, and outcome of hospitalized HF patients in a leading referral centre in Malaysia and will aid the implementation of meaningful interventions to improve patient outcome for HF patients.