Emerging Horizons in Heart Failure with Preserved Ejection Fraction: The Role of SGLT2 Inhibitors

Projected clinical benefits of dapagliflozin in patients with heart failure with preserved ejection fraction

Aims: To address the projected clinical benefits of dapagliflozin among patients with heart failure (HF) with mildly reduced ejection fraction (HFmrEF) and preserved ejection fraction (HFpEF). Methods: A multicenter, prospective, cohort study of patients ≥50 years admitted with HF to Spanish internal medicine departments. The projected clinical benefits of dapagliflozin were calculated from the DELIVER trial. Results: A total of 4049 patients were included; 3271 (80.8%) were eligible for dapagliflozin treatment, according to DELIVER criteria. Within 1 year after discharge, 22.2% were rehospitalized for HF and 21.6% died. Implementation of dapagliflozin would translate into an absolute risk reduction of 1.3% for mortality and 5.1% for HF readmission. Conclusion: HF patients with preserved or mildly reduced ejection fraction have a high risk of events. The use of dapagliflozin could substantially reduce the HF burden.

Effectiveness and safety of transcatheter aortic valve replacement in elderly people with severe aortic stenosis with different types of heart failure

BACKGROUND

Impaired left ventricular function is an independent predictor of adverse clinical outcomes in patients with aortic stenosis. The aim of this study is to evaluate the short-term changes of echocardiographic parameters, New York Heart Association (NYHA) class and B-type natriuretic peptide (BNP) level and adverse events amongst patients with heart failure (HF) after transcatheter aortic valve replacement (TAVR) procedure.

METHODS

This was a retrospective cohort study conducted at affiliated Yantai Yuhuangding Hospital of Qingdao University between September 2017 and September 2022. TAVR cases were stratified into three groups [heart failure with reduced ejection fraction (HFrEF), heart failure with mildly reduced ejection fraction (HFmrEF), heart failure with preserved ejection fraction (HFpEF)] by left ventricular ejection fraction (LVEF). Baseline characteristics, changes in echocardiographic parameters (1 week and 1 month), BNP (1 month), and NYHA class (6 months) post-TAVR were compared across the three groups. Meanwhile, we observed the adverse events of the patients after TAVR.

RESULTS

A total of 96 patients were included, of whom 15 (15.6%) had HFrEF, 15 (15.6%) had HFmrEF, and 66 (68.8%) had HFpEF. Compared to the HFpEF subgroup, patients in the HFrEF subgroup were younger (p < 0.05), and with a higher BNP (p < 0.05). The left ventricular end-diastolic dimension (LVEDD) in HFrEF group decreased significantly after TAVR. HFmrEF and HFrEF patients showed significant improvements in LVEF after TAVR. The pulmonary artery systolic pressure (PASP), aortic valve peak gradient (AVPG) and aortic valve peak gradient (V_max) decreased significantly 1 month after TAVR in all three groups compared to the baseline (all p < 0.05). BNP significantly reduced in HFrEF group compared to HFpEF patients after TAVR (p < 0.05). The majority of patients experienced an improvement at least one NYHA class in all three groups 6 months post-TAVR. There is no significant increase in the risk of adverse events in the HFrEF group.

CONCLUSIONS

Patients who underwent TAVR achieved significant improvements in BNP, NYHA class, LVEDD, LVEF, and PASP across the three HF classes, with a more rapid and pronounced improvement in the HFrEF and HFmrEF groups. Complication rates were low in the different HF groups. There is no significant increase in the risk of periprocedural complications in the HFrEF and HFmrEF groups.

Advances in Heart Failure with Preserved Ejection Fraction Management - The Role of Sacubitril-Valsartan, Pirfenidone, Spironolactone and Empagliflozin: Is Success a Series of Small Victories?

BACKGROUND

Heart failure with preserved ejection fraction (HFpEF) is a syndrome characterized by marked heterogeneity in comorbidities and etiopathology substrates, leading to a diverse range of clinical manifestations and courses. Treatment options have been extremely limited and up to this day, there are virtually no pharmaceutical agents proven to reduce mortality in these patients.

OBJECTIVE

The primary objective of this narrative review is to critically summarize existing evidence regarding the use of Angiotensin Receptor-Neprilysin Inhibitor (ARNI), spironolactone, pirfenidone and empagliflozin in HFpEF.

METHODS

Medline (via PubMed) and Scopus were searched - from inception up to May 2022- using adequately selected keywords. Additional hand-search was also performed using the references of the articles identified as relevant (snowball strategy).

RESULTS

Angiotensin Receptor-Neprilysin Inhibitor (ARNI) and spironolactone, despite being very successful in HFrEF, did not do well in clinical trials of HFpEF, although there appear to be certain subsets of patients who may derive benefit. Data regarding pirfenidone are limited and come from small trials; as a result, it would be premature to draw firm conclusions, although it seems improbable that this agent will ever become a mainstay in the general population of HPpEF patients, while there may be a niche for the drug in individuals with comorbidities associated with an intense fibrotic activity. Finally, empagliflozin, largely welcomed as the first agent to have a "positive" randomized clinical trial in HFpEF, does not seem to evade the general pattern of reduced hospitalizations for HF with no substantial effect on mortality, seen in ARNI and spironolactone HFpEF trials.

CONCLUSION

Recent research in drug treatment for HFpEF has resulted in an overall mixed picture, with trials showing potential benefits from certain classes of drugs, such as sodium-glucose co-transporter 2 inhibitors, and no benefit from other drugs, which have shown to be effective in patient with reduced ejection fraction. However, small steps may be the way to go in HFpEF, and success is sometimes just a series of small victories.

Empagliflozin attenuates trastuzumab-induced cardiotoxicity through suppression of DNA damage and ferroptosis

Trastuzumab (TZM) is commonly used for target therapy in breast cancer patients with high HER2 although the cardiotoxicity restricts its clinical usage. DNA damage and ferroptosis are implicated in anti-tumor drug cardiotoxicity. Given the emerging use of SGLT2 inhibitors in clinical cardiology, this study evaluated the impact of SGLT2 inhibitor Empagliflozin on TZM-induced cardiotoxicity, and mechanism involved with a focus on DNA damage and ferroptosis. Adult C57BL/6 mice were challenged with TZM (10 mg/kg/week, i.p.) or saline for six weeks. A cohort of mice received Empagliflozin (10 mg/kg, i.p.) at the same time. Myocardial function, morphology, ultrastructure, mitochondrial integrity, oxidative stress, DNA damage and various cell death domains were evaluated in TZM-challenged mice with or without Empagliflozin treatment. Our data revealed that TZM challenge overtly increased levels of serum LDH and troponin I, promoted adverse myocardial remodeling (increased heart weight, chamber size, cardiomyocyte area and interstitial fibrosis), contractile dysfunction and intracellular Ca²⁺ mishandling, oxidative stress, lipid peroxidation, mitochondrial ultrastructural damage, DNA damage, apoptosis and ferroptosis, the effects of which were greatly attenuated or mitigated by Empagliflozin with little effects from Empagliflozin itself. In vitro study indicated that induction of DNA damage mimicked TZM-induced lipid peroxidation and cardiomyocyte contractile dysfunction while the ferroptosis inducer erastin mitigated Empagliflozin-offered protection against lipid peroxidation and cardiomyocyte dysfunction (but not DNA damage). Likewise, in vivo and in vitro inhibition of ferroptosis recapitulated Empagliflozin-offered cardioprotection against TZM exposure. Taken together, these data demonstrated that Empagliflozin may be possible candidate drug for TZM cardiotoxicity likely through a DNA damage-ferroptosis-mediated mechanism.

Future scope and challenges for congestive heart failure: Moving towards development of pharmacotherapy

Heart failure is invariably associated with cardiac hypertrophy and impaired cardiac performance. Although several drugs have been developed to delay the progression of heart failure, none of the existing interventions have shown beneficial effects in reducing morbidity and mortality. In order to determine specific targets for future drug development, we have discussed different mechanisms involving both cardiomyocytes and non-myocyte (extracellular matrix) alterations for the transition of cardiac hypertrophy to heart failure as well as for the progression of heart failure. We have emphasized the role of oxidative stress, inflammatory cytokines, metabolic alterations and Ca2+-handling defects in adverse cardiac remodeling and heart dysfunction in hypertrophied myocardium. Alterations in the regulatory process due to several protein kinases as well as participation of mitochondrial Ca2+-overload, activation of proteases and phospholipases and changes in gene expression for subcellular remodeling have also been described for the occurrence of cardiac dysfunction. Association of cardiac arrhythmia with heart failure has been explained as a consequence of catecholamine oxidation products. Since these multifactorial defects in extracellular matrix and cardiomyocytes are evident in the failing heart, it is a challenge for experimental cardiologists to develop appropriate combination drug therapy for improving cardiac function in heart failure.

Premature Mortality in Type 2 Diabetes Mellitus Associated with Heart Failure and Chronic Kidney Disease: 20 Years of Real-World Data

INTRODUCTION

Type 2 diabetes mellitus (T2D) increases the risk of heart failure (HF) and chronic kidney disease (CKD). Nonetheless, evidence of cardiovascular (CV) prognosis is relatively scarce in young T2D patients.

PURPOSE

To estimate the risk of all-cause death, CV death, and non-fatal major CV events (MACEs) in T2D patients younger than 65 years old.

METHODS

We designed a retrospective cohort study using incident cases of either T2D, HF, or CKD in the population aged 40-65 years, from 1st January 2000 to 31st December 2019. Each individual was followed for up to one year. The primary analysis consisted of survival analysis with Cox proportional hazards to compare one-year risk of all-cause death, CV death, and MACEs between T2D without HF or CKD (T2D), T2D with HF (T2D-HF), and T2D with CKD (T2D-CKD) groups.

RESULTS

A total of 14,986 incident adult diabetic patients from the last two decades in our institution were included with an average age at cohort inclusion of 55-58 years old. Glycemic control was similar among groups. The adjusted hazard ratio (HR) of one-year all-cause death was 2.77 (95% CI: 2.26-3.40) for T2D-HF and 3.09 (2.77-3.45) for T2D-CKD compared with the baseline T2D risk. The highest event rate (T2D-CKD) was 0.15 per person-year. The adjusted HR of one-year CV death was 2.75 (95% CI: 2.19-3.46) for T2D-CKD and 2.59 (1.72-3.91) for T2D-HF. The non-fatal MACE risk was significantly increased in T2D-HF or T2D-CKD compared with T2D (2.82 (CI95%: 2.34-3.41) for T2D-CKD vs. 1.90 (CI95%: 1.66-2.17) for T2D-CKD) with a 32% event rate in non-fatal MACEs.

CONCLUSIONS

Coexistence of HF or CKD is associated with increased premature mortality as well as non-fatal CV events in T2D patients under 65 years old.