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Impact of training on combined cardiopulmonary exercise test with stress echocardiography parameters in HFrEF patients

Published:September 23, 2022DOI:https://doi.org/10.1016/j.ijcard.2022.09.041

      Highlights

      • Exercise-based cardiac rehabilitation improves quality of life in heart failure patients
      • Effects of exercise-based cardiac rehabilitation on the cardiac function are understudied
      • The combination of stress echo and CPET is useful to better predict response to training in CHF patients

      Abstract

      Background

      Exercise-based cardiac rehabilitation is recognized to improve quality of life in heart failure patients. However, the effects on the cardiac function are understudied.
      The main objective was to assess the impact of a 4-week cardiac rehabilitation program on cardiopulmonary exercise testing (CPET) combined with simultaneous echocardiography parameters in chronic heart failure (CHF) patients. The secondary aim was to investigate patients' responses to training.

      Methods

      Forty-one CHF patients with reduced ejection fraction (29.3 ± 0.1%) underwent CPET and stress echocardiography before and after a 4-week of exercise-training program. Blood parameters, echocardiography and cardiopulmonary parameters were assessed before and after training. Potential echocardiography derived predictive parameters like left and right contractile reserves, left ventricle elastance, end systolic volume and right ventricle S wave response to exercise were also assessed.

      Results

      The training program increased the peak oxygen consumption (VO2) (P < 0.001), the peak systolic blood pressure, the left ventricular outflow tract velocity time integral (P < 0.05) and the circulatory (P < 0.001) and ventilatory (P < 0.01) powers. It also decreased the VE/VCO2 slope (P < 0.001). As the median value of peak VO2 gain was 17%, patients above this value were considered as responders and patients below as non-responders to training. The responders presented a higher left ventricle contractile reserve compared to non-responder patients. The peak left ventricle elastance and peak right ventricle S wave response tended to be higher in responders.

      Conclusion

      Combination of CPET and stress echocardiography may contribute to establish the disease severity stratification and to predict response to training in CHF patients with reduced ejection fraction.

      Keywords

      Abbreviation list:

      A (LV late peak filling velocity), ACE (angiotensin converting enzyme), BMI (body mass index), BNP (brain natriuretic peptide), CHF (chronic heart failure), CPET (cardiopulmonary exercise testing), CO (cardiac output), DBP (diastolic blood pressure), E (LV early peak filling velocity), e’ (early filling), E/A and E/e′ (LV filling pressures), EDD (end-diastolic diameter), EDV (end-diastolic volume), EF (ejection fraction), ESV (end-systolic volume), ExTP (exercise training program), HF (heart failure), HFrEF (heart failure with reduced ejection fraction), HR (heart rate), HRR (heart rate reserve), LV (left ventricle), LVEF (left ventricular ejection fraction), LVOT (LV outflow tract), MDRD (modification of diet in renal disease), NYHA (New York Heart Association), PASP (pulmonary arterial systolic pressure), QoL (quality of life), RV (right ventricle), S (systolic wave), SBP (systolic blood pressure), SD (standard deviation), SV (stroke volume), VE/VCO2 slope (ventilation/ volume of exhaled carbon dioxide), VO2 (oxygen uptake), VO2/HR (oxygen pulse), VT1 (ventilatory threshold 1), VTI (velocity time integral;), W (workload)
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