Improvement in left ventricular ejection fraction after pharmacological up-titration in new-onset heart failure with reduced ejection fraction

Clinical Perspective of Myocardial Recovery and Improvement: Definitions, Prevalence, and Relevance

Partial or complete imaging resolution of left ventricular (LV) systolic dysfunction in patients with heart failure with reduced ejection fraction (HFrEF) has gone by many names in the past few decades, including LV recovery, remission, reverse remodeling, and, most recently, improvement. This phenomenon has been described in a variety of clinical scenarios, including removal of an acute myocardial insult, unloading with durable LV assist devices, and treatment with various devices as well as pharmacotherapies, termed guideline-directed medical therapy (GDMT). Irrespective of definition, systolic improvement is associated with improved clinical outcomes compared to persistent systolic dysfunction. In the past few years, systolic improvement has been distinguished from HFrEF as a new clinical entity referred to as HF with improved EF (HFimpEF). Given the relative novelty of this condition, there is a paucity of data with regard to the clinical trajectory and management of this population. In this review, we describe the history of myocardial improvement terminology and explore notable findings that have led to the delineation of HFimpEF. Additionally, we highlight the importance of understanding LV trajectory and the potential opportunity for new GDMT management for clinicians when treating patients with HFimpEF.

Ischemic Stroke and Reduced Left Ventricular Ejection Fraction: A Multidisciplinary Approach to Optimize Brain and Cardiac Health

Reduced left ventricular ejection fraction ≤40%, a known risk factor for adverse cardiac outcomes and recurrent acute ischemic stroke, may be detected during an acute ischemic stroke hospitalization. A multidisciplinary care paradigm informed by neurology and cardiology expertise may facilitate the timely implementation of an array of proven heart failure-specific therapies and procedures in a nuanced manner to optimize brain and cardiac health.

Impact of Multidisciplinary Heart Failure Clinic on Guideline-Directed Medical Therapy and Clinical Outcomes

Background

Heart failure (HF) is associated with recurrent hospital admissions and high mortality. Guideline-directed medical therapy has been shown to improve prognosis for patients who have HF with reduced ejection fraction (HFrEF). Despite the proven benefits of guideline-directed medical therapy, its utilization is less than optimal among patients with HF in Malaysia.

Objective

To determine the impact of a multidisciplinary team HF (MDT-HF) clinic on the use of guideline-directed medical therapy and patients' clinical outcomes at 1 year.

Methods

This retrospective study was conducted in a single cardiac centre in Malaysia. Patients with HFrEF who were enrolled in the MDT-HF clinic between November 2017 and June 2020 were compared with a matched control group who received the standard of care. Data were retrieved from the hospital electronic system and were analyzed using statistical software.

Results

A total of 54 patients were included in each group. Patients enrolled in the MDT-HF clinic had higher usage of renin-angiotensin system blockers (54 [100%] vs 47 [87%], p < 0.001) and higher attainment of the target dose for these agents (35 [65%] vs 5 [9%], p < 0.001). At 1 year, the mean left ventricular ejection fraction (LVEF) was significantly greater in the MDT-HF group (35.7% [standard deviation 12.3%] vs 26.2% [standard deviation 8.7%], p < 0.001), and care in the MDT-HF clinic was significantly associated with better functional class, with a lower proportion of patients categorized as having New York Heart Association class III HF at 1 year (1 [2%] vs 14 [26%], p = 0.001). Patients in the MDT-HF group also had a significantly lower rate of readmission for HF (4 [7%] vs 32 [59%], p < 0.001).

Conclusions

Patients who received care in the MDT-HF clinic had better use of guideline-directed medical therapy, greater improvement in LVEF, and a lower rate of readmission for HF at 1 year relative to patients who received the standard of care.

Initiation and Up-Titration of Guideline-Based Medications in Hospitalized Acute Heart Failure Patients - A Report From the West Tokyo Heart Failure Registry

BACKGROUND

Despite recommendations from clinical practice guidelines to initiate and titrate guideline-directed medical therapy (GDMT) during their hospitalization, patients with acute heart failure (AHF) are frequently undertreated. In this study we aimed to clarify GDMT implementation and titration rates, as well as the long-term outcomes, in hospitalized AHF patients.

METHODS AND RESULTS

Among 3,164 consecutive hospitalized AHF patients included in a Japanese multicenter registry, 1,400 (44.2%) with ejection fraction ≤40% were analyzed. We assessed GDMT dosage (β-blockers, renin-angiotensin inhibitors, and mineralocorticoid-receptor antagonists) at admission and discharge, examined the contributing factors for up-titration, and evaluated associations between drug initiation/up-titration and 1-year post-discharge all-cause death and rehospitalization for HF via propensity score matching. The mean age of the patients was 71.5 years and 30.7% were female. Overall, 1,051 patients (75.0%) were deemed eligible for GDMT, based on their baseline vital signs, renal function, and electrolyte values. At discharge, only 180 patients (17.1%) received GDMT agents up-titrated to >50% of the maximum titrated dose. Up-titration was associated with a lower risk of 1-year clinical outcomes (adjusted hazard ratio: 0.58, 95% confidence interval: 0.35-0.96). Younger age and higher body mass index were significant predictors of drug up-titration.

CONCLUSIONS

Significant evidence-practice gaps in the use and dose of GDMT remain. Considering the associated favorable outcomes, further efforts to improve its implementation seem crucial.

Right ventricular dysfunction in patients with new-onset heart failure: longitudinal follow-up during guideline-directed medical therapy

AIMS

Improvement in left ventricular ejection fraction (LVEF) after up-titration of guideline-directed medical therapy (GDMT) has been well described in heart failure (HF) patients. Less is known about the prevalence and clinical course of right ventricular dysfunction (RVD) in patients with new-onset HF.

METHODS AND RESULTS

From 2012 to 2018, 625 patients with a recent (<3 months) diagnosis of HF were referred to a specialized nurse-led HF clinic for protocolized up-titration of GDMT. RVD, defined as tricuspid annular plane systolic excursion (TAPSE) <17 mm, was assessed at baseline and at the follow-up visit. Patients were followed for the combined endpoint of all-cause mortality and HF hospitalization for a mean of 3.3 ± 1.9 years. Of the 625 patients, 241 (38.6%) patients had RVD at baseline. Patients with RVD were older, more symptomatic, had a lower LVEF, and more often had a history of cardiothoracic surgery and atrial fibrillation. After a median follow-up of 9 months, right ventricular function normalized in 49% of the patients with baseline RVD. RVD at baseline was associated with a higher risk of the combined endpoint (hazard ratio [HR] 1.62, 95% confidence interval [CI] 1.21-2.18). Right ventricular function normalization was associated with a lower risk for the combined endpoint (HR 0.56, 95% CI 0.31-0.99), independent of baseline TAPSE, age, sex, and LVEF.

CONCLUSION

More than one-third of patients with new-onset HF have RVD. RVD is associated with a higher risk of all-cause mortality and HF hospitalization. Recovery of RVD regularly occurs during up-titration of GDMT and is associated with improved clinical outcomes.