BACKGROUND: People with heart failure experience substantial disease burden that includes low exercise tolerance, poor health-related quality of life (HRQoL), increased risk of mortality and hospital admission, and high healthcare costs. The previous 2018 Cochrane review reported that exercise-based cardiac rehabilitation (ExCR) compared to no exercise control shows improvement in HRQoL and hospital admission amongst people with heart failure, as well as possible reduction in mortality over the longer term, and that these reductions appear to be consistent across patient and programme characteristics. Limitations noted by the authors of this previous Cochrane review include the following: (1) most trials were undertaken in patients with heart failure with reduced (< 45%) ejection fraction (HFrEF), and women, older people, and those with heart failure with preserved (≥ 45%) ejection fraction (HFpEF) were under-represented; and (2) most trials were undertaken in a hospital or centre-based setting.
OBJECTIVES: To assess the effects of ExCR on mortality, hospital admission, and health-related quality of life of adults with heart failure.
SEARCH METHODS: We searched CENTRAL, MEDLINE, Embase, CINAHL, PsycINFO and Web of Science without language restriction on 13 December 2021. We also checked the bibliographies of included studies, identified relevant systematic reviews, and two clinical trials registers.
SELECTION CRITERIA: We included randomised controlled trials (RCTs) that compared ExCR interventions (either exercise only or exercise as part of a comprehensive cardiac rehabilitation) with a follow-up of six months or longer versus a no-exercise control (e.g. usual medical care). The study population comprised adults (≥ 18 years) with heart failure - either HFrEF or HFpEF.
DATA COLLECTION AND ANALYSIS: We used standard Cochrane methods. Our primary outcomes were all-cause mortality, mortality due to heart failure, all-cause hospital admissions, heart failure-related hospital admissions, and HRQoL. Secondary outcomes were costs and cost-effectiveness. We used GRADE to assess the certainty of the evidence.
MAIN RESULTS: We included 60 trials (8728 participants) with a median of six months' follow-up. For this latest update, we identified 16 new trials (2945 new participants), in addition to the previously identified 44 trials (5783 existing participants). Although the existing evidence base predominantly includes patients with HFrEF, with New York Heart Association (NYHA) classes II and III receiving centre-based ExCR programmes, a growing body of trials includes patients with HFpEF with ExCR undertaken in a home-based setting. All included trials employed a usual care comparator with a formal no-exercise intervention as well as a wide range of active comparators, such as education, psychological intervention, or medical management. The overall risk of bias in the included trials was low or unclear, and we mostly downgraded the certainty of evidence of outcomes upon GRADE assessment. There was no evidence of a difference in the short term (up to 12 months' follow-up) in the pooled risk of all-cause mortality when comparing ExCR versus usual care (risk ratio (RR) 0.93, 95% confidence interval (CI) 0.71 to 1.21; absolute effects 5.0% versus 5.8%; 34 trials, 36 comparisons, 3941 participants; low-certainty evidence). Only a few trials reported information on whether participants died due to heart failure. Participation in ExCR versus usual care likely reduced the risk of all-cause hospital admissions (RR 0.69, 95% CI 0.56 to 0.86; absolute effects 15.9% versus 23.8%; 23 trials, 24 comparisons, 2283 participants; moderate-certainty evidence) and heart failure-related hospital admissions (RR 0.82, 95% CI 0.49 to 1.35; absolute effects 5.6% versus 6.4%; 10 trials; 10 comparisons, 911 participants; moderate-certainty evidence) in the short term. Participation in ExCR likely improved short-term HRQoL as measured by the Minnesota Living with Heart Failure (MLWHF) questionnaire (lower scores indicate better HRQoL and a difference of 5 points or more indicates clinical importance; mean difference (MD) -7.39 points, 95% CI -10.30 to -4.77; 21 trials, 22 comparisons, 2699 participants; moderate-certainty evidence). When pooling HRQoL data measured by any questionnaire/scale, we found that ExCR may improve HRQoL in the short term, but the evidence is very uncertain (33 trials, 37 comparisons, 4769 participants; standardised mean difference (SMD) -0.52, 95% CI -0.70 to -0.34; very-low certainty evidence). ExCR effects appeared to be consistent across different models of ExCR delivery: centre- versus home-based, exercise dose, exercise only versus comprehensive programmes, and aerobic training alone versus aerobic plus resistance programmes.
AUTHORS' CONCLUSIONS: This updated Cochrane review provides additional randomised evidence (16 trials) to support the conclusions of the previous 2018 version of the review. Compared to no exercise control, whilst there was no evidence of a difference in all-cause mortality in people with heart failure, ExCR participation likely reduces the risk of all-cause hospital admissions and heart failure-related hospital admissions, and may result in important improvements in HRQoL. Importantly, this updated review provides additional evidence supporting the use of alternative modes of ExCR delivery, including home-based and digitally-supported programmes. Future ExCR trials need to focus on the recruitment of traditionally less represented heart failure patient groups including older patients, women, and those with HFpEF.
BACKGROUND: This review aimed to compare the relative effectiveness of different exercise-based cardiac rehabilitation (ExCR) delivery modes (centre-based, home-based, hybrid and technology-enabled ExCR) on key heart failure (HF) outcomes: exercise capacity, health-related quality of life (HRQoL), HF-related hospitalisation and HF-related mortality.
METHODS AND RESULTS: Randomised controlled trials (RCTs) published through 20 June 2021 were identified from six databases, and reference lists of included studies. Risk of bias and certainty of evidence were evaluated using the Cochrane tool and Grading of Recommendations Assessment, Development and Evaluation, respectively. Bayesian network meta-analysis was performed using R. Continuous and binary outcomes are reported as mean differences (MD) and ORs, respectively, with 95% credible intervals (95% CrI). One-hundred and thirty-nine RCTs (n=18 670) were included in the analysis. Network meta-analysis demonstrated improvements in VO2peak following centre-based (MD (95% CrI)=3.10 (2.56 to 3.65) mL/kg/min), home-based (MD=2.69 (1.67 to 3.70) mL/kg/min) and technology-enabled ExCR (MD=1.76 (0.27 to 3.26) mL/kg/min). Similarly, 6 min walk distance was improved following hybrid (MD=84.78 (31.64 to 138.32) m), centre-based (MD=50.35 (30.15 to 70.56) m) and home-based ExCR (MD=36.77 (12.47 to 61.29) m). Incremental shuttle walk distance did not improve following any ExCR delivery modes. Minnesota living with HF questionnaire improved after centre-based (MD=-10.38 (-14.15 to -6.46)) and home-based ExCR (MD=-8.80 (-13.62 to -4.07)). Kansas City Cardiomyopathy Questionnaire was improved following home-based ExCR (MD=20.61 (4.61 to 36.47)), and Short Form Survey 36 mental component after centre-based ExCR (MD=3.64 (0.30 to 6.14)). HF-related hospitalisation and mortality risks reduced only after centre-based ExCR (OR=0.41 (0.17 to 0.76) and OR=0.42 (0.16 to 0.90), respectively). Mean age of study participants was only associated with changes in VO2peak.
CONCLUSION: ExCR programmes have broader benefits for people with HF and since different delivery modes were comparably effective for improving exercise capacity and HRQoL, the selection of delivery modes should be tailored to individuals' preferences.
ANTECEDENTES: Las directrices recomiendan rehabilitación cardiaca basada ejercicio (RCEE) para los pacientes con insuficiencia cardíaca (IC). Sin embargo, la investigación estableció que no ha investigado los resultados a largo plazo, incluida la mortalidad y la hospitalización a la luz de la gestión contemporánea de la IC.
MÉTODOS: Se realizó una revisión sistemática incluyendo un meta-análisis de RCEE en todas las causas de mortalidad, ingreso en el hospital, y la capacidad de ejercicio estandarizado mediante cuatro pruebas de esfuerzo independientes en los pacientes con insuficiencia cardíaca durante un seguimiento mínimo de seis meses a partir de enero de 1999- enero de 2013. Se realizaron búsquedas electrónicas en las bases de datos: Medline, CENTRAL, EMBASE, CINAHL, PsycINFO y limitadas a los ensayos controlados aleatorios (ECA).
RESULTADOS: Un total de 46 ECA separados clasificó para el meta-análisis, que emplea métodos convencionales para datos binarios y continuos. El riesgo relativo (RR) Relación de ingreso hospitalario (12 estudios) se redujo significativamente (relación RR 0,65; intervalo de confianza del 95% (IC) ,50-,84; p = 0,001), pero la mortalidad (21 estudios) no fue (relación RR 0,88 ; IC del 95%: 0,77 a 1,02; p = 0,08). La capacidad de ejercicio estandarizado (26 estudios) mostró una diferencia de medias estandarizada (DME) a favor del grupo de ejercicio en comparación con los controles (DME 0,98; IC del 95%: 0,59 a 1,37; p <0,001). Las mujeres y las personas de edad se inscribieron con menos frecuencia en los ECA independientes de los resultados. La heterogeneidad fue de moderada a alta en el análisis del ingreso en el hospital y la capacidad de ejercicio estandarizado demuestra a través de asimetría en sus gráficos en embudo.
CONCLUSIONES: RCEE en pacientes con IC se asocia con mejoras significativas en la capacidad de ejercicio y el ingreso hospitalario durante un mínimo de seis meses de seguimiento, pero no en todas las causas de mortalidad.
OBJETIVO: Actualizar la revisión sistemática de Cochrane para la rehabilitación cardíaca (RC) basada en ejercicio para la insuficiencia cardíaca.
MÉTODOS: Se realizó una revisión sistemática y metanálisis de ensayos controlados aleatorizados. MEDLINE, EMBASE y la Biblioteca Cochrane fueron exploradas hasta Enero de 2013. Ensayos con 6 o más meses de seguimiento fueron incluidos si evaluaron los efectos de las intervenciones de ejercicio solas o como un complemento de un amplio programa de RC comparado con un control sin ejercicio.
RESULTADOS: 33 ensayos fueron incluidos con 4740 participantes predominantemente con una fracción de eyección reducida (<40%) y clase II y III de la New York Heart Association. En comparación con los controles, mientras no hubo diferencia en la mortalidad por todas las causas combinada entre RC con ejercicio con un seguimiento de 1 año (riesgo relativo (RR) 0.93; 95% IC 0.69 a 1.27, p=0.67), hubo una tendencia hacia la reducción en ensayos con un seguimiento mayor a 1 año (RR 0.88; 0.75 a 1.02, 0.09). RC con ejercicio redujo el riesgo total (RR 0.75; 0.62 a 0.92, 0.005) y hospitalización específica por insuficiencia cardíaca (RR 0.61; 0.46 a 0.80, 0.0004) y resultó en una importante mejora clínica en el cuestionario de Minnesota Living with Heart Failure (diferencia media: -5.8 puntos, -9.2 a -2.4, 0.0007). Un análisis univariado de metarregresión mostró que estos beneficios fueron independientes del tipo de dosis o ejercicio de RC, y la duración del seguimiento, calidad o fecha de la publicación.
CONCLUSIONES: Esta revisión actualizada de Cochrane muestra que las mejoras en hospitalización y calidad de vida relacionada a la salud con RC basada en ejercicio parece ser consistente entre los pacientes sin importar las características del programa de RC y puede reducir la mortalidad a largo plazo. Se necesita un metanálisis con datos de participantes individuales para proveer evidencia confirmatoria sobre la importancia de un subgrupo de pacientes y características del nivel del programa (ej, dosis de ejercicio) en el resultado.
De las revisiones sistemáticas anteriores y meta-análisis, existe un consenso acerca de los efectos positivos del ejercicio físico sobre la capacidad de ejercicio para la insuficiencia cardíaca sistólica (HF), sin embargo, el efecto sobre los marcadores pronósticos reales tales como el NT-proBNP y la producción de dióxido de minutos ventilación / carbono (VE / VCO2) pendiente no ha sido evaluada. El objetivo primario del estudio propuesto es determinar el efecto de la práctica de ejercicio aeróbico (AEX) en la ladera VE/VCO2 y NT-proBNP. Las siguientes bases de datos (hasta 30 de febrero 2013) Se realizaron búsquedas sin limitaciones de idioma: CENTRAL (The Cochrane Library 2013, número 2), MEDLINE (desde enero de 1966), EMBASE (desde enero de 1980), y la Physiotherapy Evidence Database (PEDro) (desde enero de 1929). Se revisaron las listas de referencias de los artículos y también llevó a cabo una extensa búsqueda en la mano de la literatura. Se incluyeron los ensayos controlados aleatorios de las intervenciones basadas en ejercicios con 2 meses de seguimiento o más largo en comparación con la atención médica habitual o placebo. La población de estudio los adultos de edades comprendidas entre 18 y 65 años formaba parte, con la evidencia de la insuficiencia cardiaca sistólica crónica (FEVI <45% y el inicio del estudio de NT-proBNP> 300 pg / ml). Dos revisores extrajeron de forma independiente los datos sobre el diseño del estudio, los participantes, las intervenciones y los resultados. Se evaluó el riesgo de sesgo mediante la escala PEDro. Se calcularon las diferencias de medias (DM) o diferencias de medias estandarizadas entre los grupos de intervención y control para los resultados con datos suficientes; para otros resultados, describimos los hallazgos de los estudios individuales. Ocho estudios con un total de 408 participantes cumplieron los criterios de inclusión a través de la NT-proBNP (5 estudios con 191 pacientes) y VE/VCO2 pendiente (4 estudios con 217 pacientes). El ejercicio aeróbico mejora significativamente NTproBNP por un MD de -817,75 [intervalo de confianza del 95% (IC) -929,31--706,19]. Las diferencias medias en todo pendiente VE/VCO2 fueron -6.55 (IC del 95%: -7,24 a -5,87). Características y el ejercicio de esos pacientes fueron similares (frecuencia = 3-5 veces / semana, duración = 20-50 min / día; intensidad = 60-80% del VO2 pico) en los estudios incluidos. Por otra parte, el riesgo de sesgo en todos los estudios fue homogénea (escala PEDro = 7-8 puntos). Sin embargo, basado en el análisis estadístico, la heterogeneidad entre los estudios era aún alta, que está relacionada con las características variables de los estudios. El ejercicio aeróbico puede ser eficaz en la mejora de NT-proBNP y la pendiente VE/VCO2 en pacientes con IC sistólica, pero estos efectos se limitan a un criterio de inclusión específico reunión población con IC específico en un número limitado de estudios. Futuro estudios controlados aleatorios incluidos diastólica y saltar por encima de la IC con enfermedades pulmonares son necesarios para comprender mejor la influencia exacta de AEX.
People with heart failure experience substantial disease burden that includes low exercise tolerance, poor health-related quality of life (HRQoL), increased risk of mortality and hospital admission, and high healthcare costs. The previous 2018 Cochrane review reported that exercise-based cardiac rehabilitation (ExCR) compared to no exercise control shows improvement in HRQoL and hospital admission amongst people with heart failure, as well as possible reduction in mortality over the longer term, and that these reductions appear to be consistent across patient and programme characteristics. Limitations noted by the authors of this previous Cochrane review include the following: (1) most trials were undertaken in patients with heart failure with reduced (< 45%) ejection fraction (HFrEF), and women, older people, and those with heart failure with preserved (≥ 45%) ejection fraction (HFpEF) were under-represented; and (2) most trials were undertaken in a hospital or centre-based setting.
OBJECTIVES:
To assess the effects of ExCR on mortality, hospital admission, and health-related quality of life of adults with heart failure.
SEARCH METHODS:
We searched CENTRAL, MEDLINE, Embase, CINAHL, PsycINFO and Web of Science without language restriction on 13 December 2021. We also checked the bibliographies of included studies, identified relevant systematic reviews, and two clinical trials registers.
SELECTION CRITERIA:
We included randomised controlled trials (RCTs) that compared ExCR interventions (either exercise only or exercise as part of a comprehensive cardiac rehabilitation) with a follow-up of six months or longer versus a no-exercise control (e.g. usual medical care). The study population comprised adults (≥ 18 years) with heart failure - either HFrEF or HFpEF.
DATA COLLECTION AND ANALYSIS:
We used standard Cochrane methods. Our primary outcomes were all-cause mortality, mortality due to heart failure, all-cause hospital admissions, heart failure-related hospital admissions, and HRQoL. Secondary outcomes were costs and cost-effectiveness. We used GRADE to assess the certainty of the evidence.
MAIN RESULTS:
We included 60 trials (8728 participants) with a median of six months' follow-up. For this latest update, we identified 16 new trials (2945 new participants), in addition to the previously identified 44 trials (5783 existing participants). Although the existing evidence base predominantly includes patients with HFrEF, with New York Heart Association (NYHA) classes II and III receiving centre-based ExCR programmes, a growing body of trials includes patients with HFpEF with ExCR undertaken in a home-based setting. All included trials employed a usual care comparator with a formal no-exercise intervention as well as a wide range of active comparators, such as education, psychological intervention, or medical management. The overall risk of bias in the included trials was low or unclear, and we mostly downgraded the certainty of evidence of outcomes upon GRADE assessment. There was no evidence of a difference in the short term (up to 12 months' follow-up) in the pooled risk of all-cause mortality when comparing ExCR versus usual care (risk ratio (RR) 0.93, 95% confidence interval (CI) 0.71 to 1.21; absolute effects 5.0% versus 5.8%; 34 trials, 36 comparisons, 3941 participants; low-certainty evidence). Only a few trials reported information on whether participants died due to heart failure. Participation in ExCR versus usual care likely reduced the risk of all-cause hospital admissions (RR 0.69, 95% CI 0.56 to 0.86; absolute effects 15.9% versus 23.8%; 23 trials, 24 comparisons, 2283 participants; moderate-certainty evidence) and heart failure-related hospital admissions (RR 0.82, 95% CI 0.49 to 1.35; absolute effects 5.6% versus 6.4%; 10 trials; 10 comparisons, 911 participants; moderate-certainty evidence) in the short term. Participation in ExCR likely improved short-term HRQoL as measured by the Minnesota Living with Heart Failure (MLWHF) questionnaire (lower scores indicate better HRQoL and a difference of 5 points or more indicates clinical importance; mean difference (MD) -7.39 points, 95% CI -10.30 to -4.77; 21 trials, 22 comparisons, 2699 participants; moderate-certainty evidence). When pooling HRQoL data measured by any questionnaire/scale, we found that ExCR may improve HRQoL in the short term, but the evidence is very uncertain (33 trials, 37 comparisons, 4769 participants; standardised mean difference (SMD) -0.52, 95% CI -0.70 to -0.34; very-low certainty evidence). ExCR effects appeared to be consistent across different models of ExCR delivery: centre- versus home-based, exercise dose, exercise only versus comprehensive programmes, and aerobic training alone versus aerobic plus resistance programmes.
AUTHORS' CONCLUSIONS:
This updated Cochrane review provides additional randomised evidence (16 trials) to support the conclusions of the previous 2018 version of the review. Compared to no exercise control, whilst there was no evidence of a difference in all-cause mortality in people with heart failure, ExCR participation likely reduces the risk of all-cause hospital admissions and heart failure-related hospital admissions, and may result in important improvements in HRQoL. Importantly, this updated review provides additional evidence supporting the use of alternative modes of ExCR delivery, including home-based and digitally-supported programmes. Future ExCR trials need to focus on the recruitment of traditionally less represented heart failure patient groups including older patients, women, and those with HFpEF.
