Key result
The timing of low-level cardiopulmonary exercise testing 3 to 15 days after acute myocardial infarction did not significantly affect most exercise capacity variables.
Why the study?
CPET evaluates cardiopulmonary function and guides cardiac rehabilitation, but the performance of patients with stable AMI across different post-infarction testing times varies.
Does the timing of low-level cardiopulmonary exercise testing affect the evaluation of cardiopulmonary function and exercise capacity in stable acute myocardial infarction patients?
Cross-Sectional (n=61)
No
Does the timing of low-level cardiopulmonary exercise testing affect the evaluation of cardiopulmonary function and exercise capacity in stable acute myocardial infarction patients?
Absolute Event Rate: 3.4% vs 2.5%
p-value: p=<0.05
Introduction Cardiopulmonary exercise test (CPET) provides the means to evaluate the cardiopulmonary function and guide cardiac rehabilitation. The performance of acute myocardial infarction (AMI) patients at different times is different on CPET. Materials and methods This was a cross-sectional study. Patients diagnosed as AMI in stable status were included and performed the low- level CPET (RAMP 10W). CPET variables at different times were compared among four groups. Results Sixty and one patients with AMI conducted the low-level CPET from 3 to 15 days after AMI. Patients were stratified according to quartiles of CPET's time: 5 in 3–6 days group, 34 in 7–9 days group, 14 in 10–12 days group, 8 in 13–15 days group. Only VO2/HR at rest showed statistically different among the four groups.VO2/HR at rest in 3–6 days group and 10–12 days group were higher than in 13–15 days group (3.4 ± 0.85, 3.18 ± 0.78 vs. 2.50 ± 0.49 ml/beat, p < 0.05). Patients with complete revascularization had higher peak heart rate and blood pressure product and peak breathing reserve (BR), and lower Borg score compared with incomplete revascularization. And patients with LVEF >50% had higher peak BR compared with LVEF 40–50%. Conclusion It was safe and efficient to conduct the low-level CPET in stable AMI patients 3 days after onset. Time was not an effector on cardiopulmonary function and exercise capacity and prognosis in AMI during CPET. Complete revascularization and normal LVEF should be good for exercise test in AMI.
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Zhao et al. (2022) conducted a cross-sectional in Acute myocardial infarction in stable status (n=61). Timing of low-level cardiopulmonary exercise test vs. Different time intervals (13-15 days post-AMI as reference) was evaluated on VO2/HR at rest (p=<0.05). The timing of low-level cardiopulmonary exercise testing 3 to 15 days after acute myocardial infarction did not significantly affect most exercise capacity variables.
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