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Background: Among Afro Caribbean Jamaican patients with heart failure with reduced ejection fraction (HFrEF), improvements in cardiac function associated with simultaneous initiation of quadruple therapy, have not been previously reported and we aimed to assess this special population.

Methods: Combined quadruple therapy (angiotensin-receptor neprilysin inhibitor, beta-blocker, mineralocorticoid receptor antagonist, and Sodium-glucose cotransporter-2 inhibitors) was simultaneously initiated in 120 Afro Jamaican patients with HFrEF from the Heart Institute of the Caribbean. Patient data was consecutively recorded in our electronic medical records. Changes in Ejection fraction (EF) and N-terminal pro b-type natriuretic peptide (NT-ProBNP) levels, were evaluated after 90 days and statistically analysed during this two-year study.

Results: Patient mean age was 63 ± 12.7 years old, 68% male, with mean Body Mass index (BMI) 32.2±6.7 Kg/m2. Hypertension was observed in 62.5 %, T2Diabetes Mellitus in 31.7%, and history of old myocardial infarction in 15.7 %. Atrial fibrillation was present in 7.8% and left bundle branch block in 16.5 %. Other cardiomyopathies (idiopathic, peripartum and non-compaction) were noted in 16.6 %. After the quadruple therapy for a median follow-up period of 90 days, significant improvements of cardiac function were achieved. The mean NT pro-BNP level was significantly decreased from a Baseline of 3111.21 pg/mL ± 4535 to 1806.6 ± 2265.3 pg/ml. A mean change in NT Pro BNP of 1305 pg/mL ± 5069 (p < 0.001). The mean left ventricle ejection fraction (LVEF) improved from a baseline of 33.4 % ± 7.8 to 44.4 % ± 10.9. A mean change in LVEF of 11.3% ± 9.1 (p <0.001). Notably, an improvement of >10% in the LVEF was observed in 41.5% of the total population. In a separate analysis, the subgroup with T2 Diabetes mellitus showed more pronounced (mean change in EF 9.1% ± 11.0) improvement in LVEF than the non-diabetic (mean change in EF 7.7% ± 11.7) but no significant differences in the change of the NT pro-BNP levels were noted between both subgroups. The most frequent therapy adverse effect was hypotension (13.63%) followed by cough (6.81%) and kidney dysfunction (2.27%) but none of the patients presented Angioedema.

Conclusion: Among Afro Caribbean Jamaican patients with heart failure and reduced ejection fraction, simultaneous initiation of the quadruple therapy was demonstrated to be feasible, well tolerated and associated with significant functional improvement.