Dataset Information

The impact of high-intensity interval training on ventricular remodeling in patients with a recent acute myocardial infarction-A randomized training intervention pilot study.

ABSTRACT:

Background

Aerobic exercise training is associated with beneficial ventricular remodeling and an improvement in cardiac biomarkers in chronic stable heart failure. High-intensity interval training (HIIT) is a time-efficient method to improve V ˙ O 2 peak in stable coronary heart disease patients. This pilot study aimed to compare the effect of HIIT on ventricular remodeling in patients with a recent acute myocardial infarction (AMI).

Methods

Nineteen post-AMI patients were randomized to either HIIT (n = 9) or usual care (n = 10). A cardiopulmonary exercise test (CPET), transthoracic echocardiography, and cardiac biomarker assessment (ie, N-terminal pro B-type natriuretic peptide levels and G protein-coupled receptor kinase 2 expression) were performed before and after a 12-week training intervention. CPET parameters including oxygen uptake efficiency slope (OUES) and V ˙ O 2 at the first ventilatory threshold ( V ˙ O 2 VT1) were calculated. left ventricular (LV) structural and functional echocardiographic parameters including myocardial strain imaging were assessed.

Results

V ˙ O 2 peak and OUES improved solely in the HIIT group (P < .05 for group/time, respectively). There was a significant training effect for the improvement of peak work load in both groups (P < .05). O₂ pulse and V ˙ O 2 at VT1 both improved only in the HIIT group (P < .05 for time, no interaction). HIIT improved radial strain and pulsed-wave tissue Doppler imaging derived e' (P < .05 for time, no interaction). Cardiac biomarkers did not change in either group.

Conclusions

In post-AMI patients, HIIT lead to significant improvements in prognostic CPET parameters compared to usual care. HIIT was associated with favorable ventricular remodeling regarding certain echocardiographic parameters of LV function.

SUBMITTER: Trachsel LD

PROVIDER: S-EPMC6906981 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Publications

The impact of high-intensity interval training on ventricular remodeling in patients with a recent acute myocardial infarction-A randomized training intervention pilot study.

Trachsel Lukas-Daniel LD David Louis-Philippe LP Gayda Mathieu M Henri Christine C Hayami Douglas D Thorin-Trescases Nathalie N Thorin Éric É Blain Mélissa-Anne MA Cossette Mariève M Lalongé Julie J Juneau Martin M Nigam Anil A

Clinical cardiology 20191010 12

<h4>Background</h4>Aerobic exercise training is associated with beneficial ventricular remodeling and an improvement in cardiac biomarkers in chronic stable heart failure. High-intensity interval training (HIIT) is a time-efficient method to improve V ˙ O 2 peak in stable coronary heart disease patients. This pilot study aimed to compare the effect of HIIT on ventricular remodeling in patients with a recent acute myocardial infarction (AMI).<h4>Methods</h4>Nineteen post-AMI patients were rando ...[more]

PMID: 31599994

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Project description:Ten healthy male participants were recruited and successfully completed all preliminary testing and the two exercise bouts (Figure 1A). This randomized crossover design permitted signaling responses to workload- and duration-matched HIIT and MICT exercise to be mapped and interrogated within the same participant. Baseline whole-body anthropometric and blood glucose and lipid measurements confirmed these participants (age 25.4 ± 3.2 y; BMI 23.5 ± 1.6 kg/m2) were metabolically healthy, and maximal exercise capacity testing confirmed they were recreationally active but relatively untrained (relative V̇O2 peak 37.9 ± 5.2) in line with our recruitment strategy to maximize detection of skeletal muscle signaling responses to exercise (Figure 1B). Peak power output (Wpeak; 207.5 ± 40.3 W) was used to prescribe the relative work-matched intensities for HIIT and MICT. Lean mass from the DXA scan and resting metabolic rate (Figure 1B) were used to prescribe a standardized meal for each participant to consume prior to each exercise trial day. Following consumption of a standardized dinner meal the night before the HIIT or MICT exercise trial, blood and skeletal muscle biopsy samples were collected in the fasted state at baseline and at 5 min and 10 min of each respective exercise intensity. Participants completing the acute bout of HIIT, which consisted of 10 min total of 1-min ‘on’ intervals at 85 ± 0.1% of individual Wpeak (176 ± 34 W) and 1-min ‘off’ intervals at 50 W, displayed increased plasma lactate concentrations at 5 and 10 min of exercise relative to pre-exercise baseline (Figure 1C; P < 0.0001 and P < 0.001, respectively; main effect of time P < 0.0001) and no changes in plasma glucose (Figure 1D). In response to total work- and duration-matched acute bout of MICT at 55 ± 2% individual Wpeak (113 ± 17 W), participants displayed increased plasma lactate concentrations at 5 and 10 min of exercise versus baseline (Figure 1C; P < 0.001; main effect of time P < 0.0001) and no changes in plasma glucose (Figure 1D), with a main effect of higher plasma lactate levels in response to HIIT (Figure 1C; P < 0.05). To map the signaling networks regulated by HIIT and MICT, proteins from each skeletal muscle biopsy sample were extracted, digested to peptides with trypsin, isobarically labelled prior to phosphopeptide enrichment, fractionation and LC-MS/MS phosphoproteomic analysis (Figure 2A).

Dataset Information

The impact of high-intensity interval training on ventricular remodeling in patients with a recent acute myocardial infarction-A randomized training intervention pilot study.

Background

Methods

Results

Conclusions

Publications

The impact of high-intensity interval training on ventricular remodeling in patients with a recent acute myocardial infarction-A randomized training intervention pilot study.

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