scholarly journals Impaired oxygen uptake kinetics in heart failure with preserved ejection fraction

Heart ◽  
2019 ◽  
Vol 105 (20) ◽  
pp. 1552-1558 ◽  
Author(s):  
Christopher M Hearon Jr ◽  
Satyam Sarma ◽  
Katrin A Dias ◽  
Michinari Hieda ◽  
Benjamin D Levine
Keyword(s):  
Heart Failure ◽  
Cardiac Output ◽  
Ejection Fraction ◽  
Oxygen Uptake ◽  
Submaximal Exercise ◽  
Oxygen Extraction ◽  
Peak Exercise ◽  
Preserved Ejection Fraction ◽  
Metabolic Demand ◽  
Oxygen Utilisation

ObjectiveThe time needed to increase oxygen utilisation to meet metabolic demand (V̇O2 kinetics) is impaired in heart failure (HF) with reduced ejection fraction and is an independent risk factor for HF mortality. It is not known if V̇O2 kinetics are slowed in HF with preserved ejection fraction (HFpEF). We tested the hypothesis that V̇O2 kinetics are slowed during submaximal exercise in HFpEF and that slower V̇O2 kinetics are related to impaired peripheral oxygen extraction.MethodsEighteen HFpEF patients (68±7 years, 10 women) and 18 healthy controls (69±6 years, 10 women) completed submaximal and peak exercise testing. Cardiac output (acetylene rebreathing, Q̇c), ventilatory oxygen uptake (V̇O2, Douglas bags) and arterial-venous O2 difference (a-vO2 difference) derived from Q̇c and V̇O2 were assessed during exercise. Breath-by-breath O2 uptake was measured continuously throughout submaximal exercise, and V̇O2 kinetics was quantified as mean response time (MRT).ResultsHFpEF patients had markedly slowed V̇O2 kinetics during submaximal exercise (MRT: control: 40.1±14.2, HFpEF: 65.4±27.7 s; p<0.002), despite no relative impairment in submaximal cardiac output (Q̇c: control: 8.6±1.7, HFpEF: 9.7±2.2 L/min; p=0.79). When stratified by MRT, HFpEF with an MRT ≥60 s demonstrated elevated Q̇c, and impaired peripheral oxygen extraction that was apparent during submaximal exercise compared with HFpEF with a MRT <60 s (submaximal a-vO2 difference: MRT <60 s: 9.7±2.1, MRT ≥60 s: 7.9±1.1 mL/100 mL; p=0.03).ConclusionHFpEF patients have slowed V̇O2 kinetics that are related to impaired peripheral oxygen utilisation. MRT can identify HFpEF patients with peripheral limitations to submaximal exercise capacity and may be a target for therapeutic intervention.

scholarly journals Clinical performance and exercise hemodynamics in patients with severe secondary tricuspid regurgitation and chronic atrial fibrillation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jesper K. Jensen ◽  
Tor S. Clemmensen ◽  
Christian A. Frederiksen ◽  
Joachim Schofer ◽  
Mads J. Andersen ◽  
...  
Keyword(s):  
Heart Failure ◽  
Atrial Fibrillation ◽  
Cardiac Output ◽  
Ejection Fraction ◽  
Exercise Capacity ◽  
Tricuspid Regurgitation ◽  
Clinical Performance ◽  
Chronic Atrial Fibrillation ◽  
Peak Exercise ◽  
Preserved Ejection Fraction

Abstract Objective The study aimed to investigate the functional capacity and hemodynamics at rest and during exercise in patients with chronic atrial fibrillation and severe functional symptomatic tricuspid regurgitation (AF-FTR). Background Symptoms and clinical performance of severe AF-FTR mimic the population of patients with heart failure with preserved ejection fraction (HFpEF). Severe AF-FTR is known to be associated with an adverse prognosis whereas less is reported about the clinical performance including exercise capacity and hemodynamics in patients symptomatic AF-FTR. Methods Right heart catheterization (RHC) at rest and during exercise was conducted in a group of patients with stable chronic AF-TR and compared with a group of patients with HFpEF diagnosed with cardiac amyloid cardiomyopathy (CA). All patients had preserved ejection fraction and no significant left-sided disease. Results Patients with AF-FTR demonstrated a low exercise capacity that was comparable to CA patients (TR 4.9 ± 1.2 METS vs. CA 4. 7 ± 1.5 METS; P = 0.78) with an average peak maximal oxygen consumption of 15 mL/min/kg. Right atrium pressure increased significantly more in the AF-FTR patients as compared to CA patients at peak exercise (25 ± 8 vs 19 ± 9, p < 0.01) whereas PCWP increased significantly to a similar extent in both groups (31 ± 4 vs 31 ± 8 mmHg, p = 0.88). Cardiac output (CO) was significantly lower among AF-FTR at rest as compared to CA patients (3.6 ± 0.9 vs 4.4 ± 1.3 l/min; p < 0.05) whereas both groups demonstrated a poor but comparable CO reserve at peak exercise (7.3 ± 2.9 vs 7.9 ± 3.8 l/min, p = 0.59). Conclusions AF-FTR contributes to the development of advanced heart failure symptoms and poor exercise capacity reflected in increased atrial filling pressures, reduced cardiac output at rest and during exercise sharing common features seen in HFpEF patients with other etiologies.

Clinical Performance and Exercise Hemodynamics in Patients with Severe Secondary Tricuspid Regurgitation and Chronic Atrial Fibrillation

2021 ◽  
Author(s):  
Jesper Jensen ◽  
Tor Clemmensen ◽  
Christian Frederiksen ◽  
Joachim Schofer ◽  
Mads Andersen ◽  
...  
Keyword(s):  
Heart Failure ◽  
Atrial Fibrillation ◽  
Cardiac Output ◽  
Ejection Fraction ◽  
Exercise Capacity ◽  
Tricuspid Regurgitation ◽  
Clinical Performance ◽  
Chronic Atrial Fibrillation ◽  
Peak Exercise ◽  
Preserved Ejection Fraction

Abstract ObjectiveThe study aimed to investigate the functional capacity and hemodynamics at rest and during exercise in patients with chronic atrial fibrillation and severe functional symptomatic tricuspid regurgitation (AF-FTR).BackgroundSymptoms and clinical performance of severe AF-FTR mimic the population of patients with heart failure with preserved ejection fraction (HFpEF). Severe AF-FTR is known to be associated with an adverse prognosis whereas less is reported about the clinical performance including exercise capacity and hemodynamics in patients symptomatic AF-FTR. MethodsRight heart catheterization (RHC) at rest and during exercise was conducted in a group of patients with stable chronic AF-TR and compared with a group of patients with HFpEF diagnosed with cardiac amyloid cardiomyopathy (CA). All patients had preserved ejection fraction and no significant left-sided disease. ResultsPatients with AF-FTR demonstrated a low exercise capacity that was comparable to CA patients (TR 4.9 ± 1.2 METS vs. CA 4. 7 ± 1.5 METS; P = 0.78) with an average peak maximal oxygen consumption of 15 mL/min/kg. Right atrium pressure increased significantly more in the AF-FTR patients as compared to CA patients at peak exercise (25 ± 8 vs 19 ± 9, p<0.01) whereas PCWP increased significantly to a similar extent in both groups (31 ± 4 vs 31 ± 8 mmHg, p=0.88). Cardiac output (CO) was significantly lower among AF-FTR at rest as compared to CA patients (3.6 ± 0.9 vs 4.4 ± 1.3 l/min; p<0.05) whereas both groups demonstrated a poor but comparable CO reserve at peak exercise (7.3 ± 2.9 vs 7.9 ± 3.8 l/min, p=0.59). ConclusionsAF-FTR contributes to the development of advanced heart failure symptoms and poor exercise capacity reflected in increased atrial filling pressures, reduced cardiac output at rest and during exercise sharing common features seen in HFpEF patients with other etiologies.

Peak Exercise Oxygen Uptake Predicts Recurrent Admissions in Heart Failure With Preserved Ejection Fraction

2018 ◽  
Vol 71 (4) ◽  
pp. 250-256 ◽  
Author(s):  
Patricia Palau ◽  
Eloy Domínguez ◽  
Eduardo Núñez ◽  
José María Ramón ◽  
Laura López ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ejection Fraction ◽  
Oxygen Uptake ◽  
Peak Exercise ◽  
Preserved Ejection Fraction

P323Haemodynamic implications of mitral regurgitation in heart failure with preserved ejection fraction

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
M A Tamargo Delpon ◽  
O Masaru ◽  
Y N Reddy ◽  
S Pislaru ◽  
A Egbe ◽  
...  
Keyword(s):  
Heart Failure ◽  
Mitral Regurgitation ◽  
Ejection Fraction ◽  
Cardiopulmonary Exercise Testing ◽  
Common Finding ◽  
Peak Exercise ◽  
P Value ◽  
Preserved Ejection Fraction ◽  
Metabolic Demand ◽  
Baseline Characteristics

Abstract Background Mild to moderate mitral regurgitation (MR) is a common finding in heart failure with preserved ejection fraction (HFpEF). MR is often considered to be an innocent bystander, yet little data is available regarding its implications. Aim Determine the pathophysiologic correlates of MR in HFpEF Methods We retrospectively studied 280 patients with invasively proven HFpEF. MR was absent (None or trivial) in 163 subjects (Non-MR-HFpEF), and present in 117 (MR-HFpEF; 78 mild and 39 moderate MR). 247 subjects also underwent invasive cardiopulmonary exercise testing. Results At rest, MR-HFpEF subjects displayed higher pulmonary artery pressures (PAP), PCWP, and pulmonary vascular resistance (PVR; Table). During exercise, PAP and PCWP were not significantly different among groups, but MR-HFpEF displayed reduced ability to enhance cardiac output (CO) in response to heightened metabolic demand (oxygen consumption, VO2; Figure). Baseline characteristics and haemodynamic characterization at baseline and peak exercise Baseline characteristics Non-MR-HFpEF (N=163) MR-HFpEF (N=117) p value Age 66±11 71±10 0.0002 Female (%) 56 69 0.02 AFib (%) 13 38 <0.0001 Nt proBNP 192 [66, 557] 870 [401, 2135] <0.0001 E/E' 12.3±5.5 15.6±7.2 0.0006 LVEF (%) 64±6 62±6 0.0001 RV fractional area change (%) 51±9 47±10 0.0001 Mean PA (mmHg) 25±7 28±9 0.001 Mean PCWP (mmHg) 15±5 17±6 0.0002 PVR (Woods) 2.0±1.1 2.5±1.4 0.015 CO (L/min) 5.5±1.6 4.8±1.3 0.12 Peak exercise hemodynamics Non-MR-HFpEF (N=152) MR-HFpEF (N=95) p value Mean PA (mmHg 45±10 46.5±10 0.07 Mean PCWP (mmHg) 32±6 31±6 0.6 PVR (Woods) 1.8±1.6 2.7±2.4 0.002 CO (L/min) 9.1±3 7.2±3 0.01 P value adjusted for age, gender and BMI. CO change in response to VO2 increase Conclusion The presence of even mild MR in HFpEF is associated with more adverse hemodynamics, greater pulmonary vascular dysfunction and impaired CO reserve with exercise. Further study is required to better understand the natural history and treatment for MR in HFpEF. Acknowledgement/Funding None

scholarly journals Cardiac output response to exercise in relation to metabolic demand in heart failure with preserved ejection fraction

2013 ◽  
Vol 15 (7) ◽  
pp. 776-785 ◽  
Author(s):  
Muaz M. Abudiab ◽  
Margaret M. Redfield ◽  
Vojtech Melenovsky ◽  
Thomas P. Olson ◽  
David A. Kass ◽  
...  
Keyword(s):  
Heart Failure ◽  
Cardiac Output ◽  
Ejection Fraction ◽  
Preserved Ejection Fraction ◽  
Metabolic Demand ◽  
Output Response ◽  
Response To Exercise
Sign in / Sign up

Export Citation Format

Share Document