Bendopnea and risk of adverse clinical outcomes in ambulatory patients with systolic heart failure

Assessment of Bendopnea and Its Association With Clinical and Para-Clinical Findings in Systolic Heart Failure: A Cross-Sectional Study

Background and Aims

Bendopnea is a symptom found in patients with heart failure (HF) defined as shortness of breath when bending forward. The present study examined the correlation between bendopnea with other cardiac symptoms, echocardiographic findings, and cardiac function parameters.

Methods

This was a single-center prospective cross-sectional study of patients diagnosed with systolic HF. Medical history, bending tests, laboratory tests, electrocardiography (ECG), echocardiography, and 6-min walking test (6-MWT) were evaluated. Patients with reduced ejection fraction were followed to assess the 2-year outcomes for cardiovascular death and rehospitalization.

Results

A total of 80 patients were included in this study, of whom 54 (67.5%) were male. Bendopnea was present in 34 (42.5%) and their mean age was 62.44 years (compared to group without bendopnea, p = 0.869). Symptoms of HF such as dyspnea of exertion (DOE) and orthopnea were significantly related to the presence of bendopnea (p = 0.001, odds ratio (OR): 6.87, and p = 0.016, OR: 3.18, respectively). The bendopnea-positive group had a higher New York Heart Association (NYHA) class (p = 0.005). ECG results showed no significant difference between the two groups. The echocardiographic findings showed that the inferior vena cava (IVC) respiratory collapse was significantly lower in the bendopnea-positive group (p = 0.019, OR: 0.339, 95% CI:0.13-0.85). Moreover, they had a substantially lower performance in 6-MWT (387.39 vs. 325.58 m, p = 0.015). Neither rehospitalization nor death was related to bendopnea after a 2-year follow-up (p = 0.454).

Conclusion

Bendopnea was associated with several signs and symptoms of HF, including orthopnea, DOE, NYHA class, lower IVC collapse, and impaired functional capacity measured via 6-MWT. However, there was no association between bendopnea and ECG findings, ejection fraction, and NT-proBNP levels. Further studies with larger sample sizes are needed to assess the associations with long-term outcomes and confirm our findings.

Bendopnea prevalence and prognostic value in older patients with heart failure: FRAGILE-HF-SONIC-HF post hoc analysis

AIMS

This study aimed to investigate the prevalence, clinical characteristics, and prognostic value of bendopnea in older patients hospitalized for heart failure.

METHODS AND RESULTS

This post hoc analysis was performed using two prospective, multicentre, observational studies: the FRAGILE-HF (main cohort) and SONIC-HF (validation cohort) cohorts. Patients were categorized based on the presence of bendopnea, which was evaluated before discharge. The primary endpoint was 2-year all-cause mortality after discharge. Among the 1243 patients (median age, 81 years; 57.2% male) in the FRAGILE-HF cohort and 225 (median age, 79 years; 58.2% men) in the SONIC-HF cohort, bendopnea was observed in 31 (2.5%) and 10 (4.4%) patients, respectively. Over a 2-year follow-up period, all-cause death occurred in 20.8 and 21.9% of the patients in the FRAGILE-HF and SONIC-HF cohorts, respectively. Kaplan-Meier survival curves demonstrated significantly higher mortality rates in patients with bendopnea than in those without bendopnea in the FRAGILE-HF (log-rank P = 0.006) and SONIC-HF cohorts (log-rank P = 0.014). Cox proportional hazard analysis identified bendopnea as an independent prognostic factor for all-cause mortality in both the FRAGILE-HF [hazard ratio (HR) 2.11, 95% confidence interval (CI) 1.18-3.78, P = 0.012] and SONIC-HF cohorts (HR 4.20, 95% CI 1.63-10.79, P = 0.003), even after adjusting for conventional risk factors.

CONCLUSION

Bendopnea was observed in a relatively small proportion of older patients hospitalized for heart failure before discharge. However, its presence was significantly associated with an increased risk of all-cause mortality.

Activities of daily living in heart failure patients and healthy subjects: when the cardiopulmonary assessment goes beyond traditional exercise test protocols

Heart failure (HF) patients traditionally report dyspnoea as their main symptom. Although the cardiopulmonary exercise test (CPET) and 6 min walking test are the standardized tools in assessing functional capacity, neither cycle ergometers nor treadmill maximal efforts do fully represent the actual HF patients' everyday activities [activities of daily living (ADLs)] (i.e. climbing the stairs). New-generation portable metabolimeters allow the clinician to measure task-related oxygen intake (VO2) in different scenarios and exercise protocols. In the last years, we have made considerable progress in understanding the ventilatory and metabolic behaviours of HF patients and healthy subjects during tasks aimed to reproduce ADLs. In this paper, we describe the most recent findings in the field, with special attention to the relationship between the metabolic variables obtained during ADLs and CPET parameters (i.e. peak VO2), demonstrating, for example, how exercises traditionally thought to be undemanding, such as a walk, instead represent supramaximal efforts, particularly for subjects with advanced HF and/or artificial heart (left ventricular assist devices) wearers.

Calf muscle pump tensing as a novel maneuver to improve the diagnostic performance of detecting patent foramen ovale during transesophageal echocardiography

Objective

The Valsalva maneuver is the most sensitive provocative maneuver for patent foramen ovale detection. However, nearly half of patients are unable to perform the Valsalva maneuver well. The aim of this study was to investigate the mechanism of action of calf muscle pump tensing (TENSE) as a novel patent foramen ovale (PFO) provocative maneuver and to evaluate the diagnostic value for PFO and the effect on right-to-left shunt volume compared with the Valsalva maneuver.

Methods

This study prospectively investigated 171 patients who were highly suspected to have PFO clinically. Five patients with atrial septal defects newly diagnosed on transesophageal echocardiography (TEE) were excluded. 166 patients were injected with agitated saline under three provocative maneuvers: Valsalva maneuver, TENSE, and Valsalva + TENSE combined maneuver. The patients were divided into the effective Valsalva group (n = 93) and ineffective Valsalva group (n = 73) according to whether they could perform an effective Valsalva maneuver. TENSE consisted of the straightening of both lower limbs, and when the right atrium was filled with microbubbles, the patient performed instantaneous ankle dorsiflexion movements while maintaining dorsiflexion for 3-5 s.

Results

Overall, the PFO detection rate of the Valsalva + TENSE combined maneuver (78 [50.1%]) was significantly higher than that of the Valsalva maneuver (51 [30.7%]) and TENSE maneuver (57 [34.3%]) (P < 0.001). In the patients who were able to perform an effective Valsalva maneuver, the PFO detection rate by TENSE was not significantly different from that by the Valsalva maneuver (Valsalva 37/93 [39.8%] vs. TENSE 31/93 [33.3%], P > 0.05), while for the patients who performed an ineffective Valsalva maneuver, the PFO detection rate by the TENSE maneuver was higher than that by the Valsalva maneuver (TENSE 26/73 [35.6%] vs. Valsalva14/73[19.2%], P = 0.017).

Conclusion

TENSE is a simple and effective provocative maneuver in the diagnosis of PFO using TEE and can assist the Valsalva maneuver. For patients who cannot perform an effective Valsalva maneuver, TENSE can be an alternative to the Valsalva maneuver to some extent.

Effect of Bendopnea on Achievement Medical Treatment Target Doses in Heart Failure

BACKGROUND

The newly described bendopnea in heart failure (HF) is associated with increased cardiac filling pressures. The aim of the study was to show the effect of bendopnea follow-up on reaching optimal medical treatment doses in HF.

METHODS

A total of 413 patients were screened, and we included 203 patients with HF who were previously evaluated for bendopnea. Demographic data, presence or absence of bendopnea, medical history, laboratory findings, and medical treatments were evaluated. Optimal medical therapy target doses at baseline and 3rd month were compared in groups with and without bendopnea.

RESULTS

On admission, 64 patients (31.5%) had bendopnea. The rate of patients with bendopnea decreased in the 3rd month (n=42, 20.7%). The proportion of patients who used at least 50% of the recommended medical treatment dose on admission and in the 3rd month was compared; angiotensin-converting enzyme inhibitor /angiotensin receptor blockers use increased from 40.6% to 71.9% in those with bendopnea (P=0.013), from 56.1% to 81.3% in those without bendopnea (P<0.001) and beta-blockers use increased from 28.2% to 60.9% in those with bendopnea (P=0.042), from 31.6% to 69.8% in those without bendopnea (P<0.001). However, aldosterone antagonists use decreased from 70.3% to 67.2% in those with bendopnea (P=0.961), from 68.4 % to 64.1% in those without bendopnea (P=0.334). Bendopnea was independently effective in achieving ACE-I/ARB target doses (OR: 0.359, CI 95%: 0.151-0.854, P=0.020).

CONCLUSION

Bendopnea follow-up in HF patients can provide a significant improvement in reaching the recommended treatment target doses.

Bending oxygen saturation index and risk of worsening heart failure events in chronic heart failure

AIMS

Bendopnea is a clinical symptom of advanced heart failure with uncertain prognostic value. We aimed to evaluate whether bendopnea and the change in oxygen saturation when bending forward (bending oxygen saturation index [BOSI]) are associated with adverse outcomes in ambulatory chronic heart failure (CHF) patients.

METHODS AND RESULTS

We prospectively evaluated 440 subjects with symptomatic CHF. BOSI was defined as the difference between sitting and bending oxygen saturation (SpO₂ ). The endpoint was the total number of worsening heart failure (WHF) events (heart failure hospitalization or urgent heart failure visit requiring parenteral diuretic therapy). The mean age was 74 ± 10 years, 257 (58.6%) were male, and 226 (51.4%) had a left ventricular ejection fraction <50%. Bendopnea was present in 94 (21.4%) patients, and 120 (27.3%) patients had a BOSI ≥-3%. The agreement between BOSI ≥-3% and bendopnea was moderate (Gwet's AC 0.482, p < 0.001). At a median (p25%-p75%) follow-up of 2.17 years (0.88-3.16), we registered 441 WHF events in 148 patients. After multivariable adjustment, BOSI was independently associated with the risk for total WHF episodes (overall, p < 0.001). Compared to improvement/no change in SpO₂ when bending (BOSI 0%), those with BOSI ≥-3% showed an increased risk of WHF events (incidence rate ratio [IRR] 2.16, 95% confidence interval [CI] 1.67-2.79; p < 0.001). In contrast, bendopnea was not associated with the risk of total WHF episodes (IRR 1.04, 95% CI 0.83-1.31; p = 0.705).

CONCLUSIONS

In ambulatory and stable CHF patients, BOSI ≥-3% and not bendopnea was independently associated with an increased risk of total (first and recurrent) WHF episodes. Awareness of SpO₂ while assessing bendopnea may be a useful tool for predicting heart failure decompensations.

Increased frequency of occurrence of bendopnea is associated with poor outcomes in heart failure outpatients

BACKGROUND

Relationship between the frequency of occurrence of bendopnea during the daily life of heart failure (HF) outpatients and clinical outcomes has never been evaluated before.

METHODS

Turkish Research Team-Heart Failure (TREAT-HF) is a network between HF centres, which undertakes multicentric observational studies in HF. Herein, the data including stable 573 HF patients with reduced ejection fraction out of seven HF centres were presented. A questionnaire was filled by the patients, with the question 'Do you experience shortness of breath while tying your shoelace?', assessing the presence and frequency of bendopnea.

RESULTS

To the question related to bendopnea, 48% of the patients answered 'yes, every time', 31% answered 'yes, sometimes', and 21% answered 'No'. Patients were followed for an average of 24 ± 14 months, and the patients who answered 'yes, every time' and 'yes, sometimes' to the bendopnea question were found having increased risk for both HF-related hospitalisations (HR:3.2, p < .001- HR:2.8, p = .005) and composite outcome consisting of 'HF-related hospitalisations and all-cause death in the multi-variate analysis (HR:3.1, p < .001- HR:3.0, p < .001). Kaplan Meier analysis for HF-related hospitalisation, all-cause death, and the composite of these were provided for these three groups, yielding significant and graded divergence curves with the best prognosis in 'no' group, with the moderate prognosis in 'sometimes' group, and with the worst prognosis in the 'every time' group.

CONCLUSION

For the first time in the literature, our study shows that the increased frequency of bendopnea occurrence in daily life is associated with poor outcomes in HF outpatients.

A Knowledge Translation Framework for Optimizing Physical Therapy in Patients With Heart Failure

The American Physical Therapy Association has supported the development of clinical practice guidelines to promote and support evidence-based practice and reduce unwarranted practice variation. Essential to the success of this effort is the generation of knowledge translation, a concept that emphasizes the translation of global knowledge to an application that can be effectively integrated into clinical practice. The Physical Therapy Clinical Practice Guideline for the Management of Individuals with Heart Failure published in the Physical Therapy Journal in January 2020 provides a broad base of knowledge related to evidence-based treatment interventions for patients with heart failure. However, the application and integration of this knowledge in clinical practice need further elucidation. Therefore, this perspective paper aims to serve as a complementary knowledge translation resource to the recently published practice guideline to maximize the utilization of contemporary evidence in clinical practice. This resource provides the physical therapist with practical guidance in the management of patients with heart failure by placing research findings in the context of other knowledge and practice norms that can be applied at the point of care and across the continuum of care. We propose a novel ABCDE (assessment, behavior modification, cardiorespiratory fitness, dosage, and education) practical framework. This clinical paradigm is grounded in ongoing physical therapist assessment throughout the episode of care, along with behavior modification, assessment of cardiorespiratory fitness, appropriate selection and dosing of interventions, and patient education. Examples highlighting the use of this model in patients with heart failure across the continuum of care are provided for application in clinical care.

Superior vena cava stenosis presenting with bendopnea

Bendopnea, or dyspnoea with bending forward, is a recently described symptom of heart failure that is associated with elevated ventricular filling pressures. Here, we describe a case of superior vena cava (SVC) stenosis that presented with bendopnea and resolved with SVC recanalisation. We suggest that SVC stenosis be considered in the differential diagnosis of patients who experience bendopnea.

Evaluation of bendopnea in severe obstructive sleep apnea syndrome

BACKGROUND

Bendopnea is a symptom described in heart failure (HF) that is related to short-term prognosis; however, its frequency and characteristics in respiratory diseases such as OSAS is still unknown. This study was carried out to evaluate the prevalence of bendopnea in patients with severe obstructive sleep apnea syndrome (OSAS) METHODS: We conducted a study of 95 patients attending a sleep disorders unit with severe OSAS. Bendopnea was considered when shortness of breath occurred within 30s of bending forward.

RESULTS

Bendopnea was present in 33/95 of the patients included (34.7%). The median age was 62 years (52-71), 65 were men (68.4%), with a median weight of 92 (81-107) and BMI of 34kg/m² (±7.1). The median duration of shortness of breath was 5s (2-10). The presence of bendopnea was related to age (p<.0001), obesity (p .004), respiratory diseases (p .01) and HF (p .03). Admission rate was higher in those with bendopnea without reaching statistical significance.

CONCLUSION

One-third of patients with severe OSAS present bendopnea. This symptom is related to a higher prevalence of comorbidities (HF, obesity and other respiratory diseases). It is also related to a higher CT90.

[Risk Assessment of Development of the Major Adverse Cardiac Events in Patients with Chronic Heart Failure with a Preserved and Intermediate Ejection Fraction in the Presence of a Bendopnea Symptom]

Aim To evaluate the risk of major cardiovascular complications (CVC) in patients with chronic heart failure (CHF) with intermediate and preserved ejection fraction (EF) depending on the presence of bendopnea symptom.Material and methods The study included 104 patients with stage II CHF and left ventricular EF ≥40 %. Mean age of the patients was 72.8±10.6 years. A test for detection of bendopnea symptom was performed for all patients. Two groups were formed: group 1, 69 patients with the bendopnea symptom and group 2, 35 patients with a negative test. Follow-up duration was 24 months. The composite endpoint (CEP) was death and hospitalization for any CVC.Results Mean time to the bendopnea symptom was 17.3±6.61 s. At two years of follow-up, the CEP was observed in 36 (34.6 %) patients, including 30 (43.5 %) patients in group 1 and 6 (17.1 %) patients in group 2. 12 patients died, and 9 of them had the bendopnea symptom. 21 patients of group 1 were hospitalized for CVC. Risk of CEP was significantly 1.7 times higher for men (relative risk, RR 1.7 [1.1; 2.6]) than for women. The presence of bendopnea symptom increased the risk of CEP 1.4 times (ОР 1.4 [1.1;1.9]) for women and 2.3 times (RR 2.3 [1.4; 3.6]) for men.Conclusion Results of the study demonstrated an unfavorable effect of bendopnea symptom on risk of CEP during the two-year follow-up of CHF patients with preserved and intermediate EF.

Bendopnoea in exercise limited patients with COPD

Dyspnoea on bending over (bendopnoea) is most commonly associated with systolic heart failure. COPD patients often also complain of bendopnoea but little is known about this symptom in this patient group. We objectively assessed 44 COPD patients attending pulmonary rehabilitation for bendopnoea in a tertiary referral centre to determine the potential mechanism and clinical implications of this symptom. Bendopnoea was assessed by timing the duration of onset to breathlessness on bending forward at the waist for 30 s. BORG score, oxygen saturations and blood pressure measurements were obtained before and after. Of 44 patients (mean age±SD 66.7 ± 8.4 years; 22 male, BMI 28.1 ± 6.4), bendopnoea was present in 23 (52.3%) patients. This was significantly associated with a lower FEV1% (p = 0.02) and TLCO% (<0.001) and higher CAT score (p = 0.03). A strong trend was also noted with higher waist/hip ratio (p = 0.06). There were no associations with age, BMI, oxygen saturation, static lung volumes, exercise capacity or non-invasive haemodynamic markers such as pro-BNP, physiological changes or echocardiography findings.

Clinical significance of bendopnea in heart failure-Systematic review and meta-analysis

Background

Bendopnea is a symptom mediated by increased ventricular filling pressure during bending forward. Presence of bendopnea in patients can be easily evaluated without additional maneuver in several countries whose norms, habits, culture, and occupation relates to a higher frequency of bending forward. This information may prove valuable in routine clinical practice. We aimed to analyze the latest evidence on bendopnea in order to further define the clinical significance of this symptom.

Methods

We performed a comprehensive search on bendopnea in heart failure from inception up until January 2019 through PubMed, EuropePMC, EBSCOhost, Cochrane Central Database, and ClinicalTrials.gov.

Results

There were 283 patients (31.76%) who have bendopnea, and a total of 891 patients from six studies were included. Bendopnea was associated with the presence of dyspnea [odds ratio (OR) 69.70 (17.35–280.07); <0.001], orthopnea [OR 3.02 (2.02–4.52); <0.001], paroxysmal nocturnal dyspnea [OR 2.76 (1.76–4.32); <0.001], and abdominal fullness [OR 7.50 (4.15–13.58); <0.001]. Association with elevated jugular venous pressure was shown in two studies. New York Heart Association (NYHA) functional class IV was more prevalent in patients with bendopnea [OR 7.58 (4.35–13.22); <0.001]. Bendopnea was also associated with increased mortality [OR 2.21 (1.34–3.66); 0.002].

Conclusion

Bendopnea is associated with the presence of several signs and symptoms. This study also showed that bendopnea is one of the signs and symptoms of advanced heart failure associated with increased mortality. However, owing to the limited number of studies, further investigation is needed before drawing a definite conclusion.

Bendopnea: Association With Echocardiographic Features and Clinical Outcomes in Elderly Patients With Chronic Heart Failure

AIM

to assess the prevalence of bendopnea and association of this symptom with clinical, laboratory and echocardiographic features, clinical outcomes during 2 years of follow-up in ambulatory elderly patients with chronic heart failure (CHF).

MATERIALS AND METHODS

We conducted an open, prospective, non-randomized study of 80 ambulatory patients aged ≥60 years admitted with heart failure II-IV NYHA class CHF. Baseline survey included physical examination, estimation of Charlson comorbidity index, echocardiography and laboratory tests. Bendopnea was considered when shortness of breath occurred within 30 sec of sitting on a chair and bending forward. Mean follow-up was 26.6±11.0 months.

RESULTS

Bendopnea was present in 38.8 % patients. All these patients complained of shortness of breath during physical exertion and 45.2 % of them had orthopnea.  Bendopnea was associated with the male gender (odds ratio [OR] 11.8, 95 % confidence interval [CI] 4.04-34.8, p&lt;0.001), severity of the clinical status (ШОКС [shocks] scale score)  (OR 1.78, 95 % CI 1.29-2.38, p&lt;0.001), Charlson comorbidity index (OR 1.29, 95 % CI 1.07-1.52, p=0.007), coronary heart disease (OR 26.6, 95 % CI 3.34-21.3, p=0.002), history of myocardial infarction (OR 13.9, 95 % CI 4.2-46.6, p&lt;0.001), left ventricular (LV) aneurysm (OR 13.3, 95 % CI 2.69-65.9, p=0.002), increased indexed LV end-systolic diameter (OR 8.2, 95 % CI 1.9-34.1, p=0.004), left atrial size (OR 4.3, 95 % CI 1,4-12.5, p=0.008), indexed LV end-systolic volume (OR 1.32, 95 % CI 1.07-1.64, p=0.010), pulmonary artery systolic pressure (OR 1.26, 95 % 1.03-1.45, p=0.002), high levels of NT-proBNP (OR 1.0, 95 % CI 1.0-1.002, p=0.055), creatinine (OR 1.04, 95 % CI 1.02-1.07, p=0.001), uric acid (OR 1.006, 95 % CI 1.002-1.011, p=0.004); hospitalizations (OR 7.61, 95 % 2.04-28.4, p=0.003), and patient's mortality (OR 5.63, 95 % CI 1.94-16.4, p=0.001). Multifactorial analysis confirmed association of bendopnea with severity of clinical status (OR 1.70, 95 % CI 1.04-2.8, p=0.033), increased left atrial size (OR 5.67, 95 % CI 2.75-21.32, p=0.029) and Charlson comorbidity index (OR 1.17, 95 % CI 1.04-2.80, p=0.050). During follow-up 51.6 and 12.2 % of patients died among those with and without bendopnea, respectively (OR 4.22, 95 % CI 1.85-9.9, p&lt;0.001).

CONCLUSION

Bendopnea is associated with an adverse hemodynamic profile and prognosis, what allows to consider this symptom as a reliable marker of CHF severity.

Bendopnea and Its Clinical Importance in Outpatient Patients with Pulmonary Arterial Hypertension

Purpose

Bendopnea is a recently reported novel symptom in patients with heart failure (HF) defined as shortness of breath when bending forward. It has been demonstrated that bendopnea is associated with advanced symptoms and worse outcomes. The aim of this study was to assess the presence of bendopnea and its clinical importance with regards to functional status, hemodynamic and echocardiographic characteristics in outpatient pulmonary arterial hypertension (PAH) patients.

Methods

We conducted this prospective observational study of 53 patients who were admitted to our PAH clinic for routine control visits. We determined the presence of bendopnea and analyzed hemodynamic parameters, World Heart Organization (WHO) functional class, transcutaneous oxygen saturation, 6-minute walking distance (6-MWD), N-terminal pro-brain natriuretic peptide (NT-proBNP) and right ventricular (RV) function indicators in patients with and without bendopnea.

Results

Bendopnea was present 33.9% of the PAH patients. The mean age was higher in the patients with bendopnea than in those without bendopnea, but the difference was not significant (p = 0.201). The patients with bendopnea had a lower 6-MWD and higher NT-proBNP level (p < 0.001), and worse WHO functional class symptoms (p = 0.010). Mean right atrial pressure, pulmonary artery pressure, and pulmonary vascular resistance were higher in the patients with bendopnea. The patients with bendopnea had a more dilated RV end-diastolic diameter and lower tricuspid annular plane systolic excursion value (p < 0.001 and p = 0.001, respectively).

Conclusions

Bendopnea was associated with worse functional capacity status, hemodynamic characteristics and RV function in our outpatient PAH patients.

The Role of the Clinical Examination in Patients With Heart Failure

Despite advances in biomarkers and technology, the clinical examination (i.e., a history and physical examination) remains central in the management of patients with heart failure. Specifically, the clinical examination allows noninvasive assessment of the patient's underlying hemodynamic state, based on whether the patient has elevated ventricular filling pressures and/or an inadequate cardiac index. Such assessments provide important prognostic information and help guide therapeutic decision-making. Herein, the authors critically assess the utility of the clinical examination for these purposes and provide practical tips we have gleaned from our practice in the field of advanced heart failure. The authors note that the ability to assess for congestion is superior to that for inadequate perfusion. Furthermore, in current practice, elevated left ventricular filling pressures are inferred by findings related to an elevated right atrial pressure. They discuss an emerging classification system from the clinical examination that categorizes patients based on whether elevation of ventricular filling pressures occurs on the right side, left side, or both sides.