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Archivos de cardiología de México
On-line version ISSN 1665-1731Print version ISSN 1405-9940
Abstract
CITALAN-JIMENEZ, José A. et al. Myocardial efficiency index in patients with heart disease after a cardiac rehabilitation program. Arch. Cardiol. Méx. [online]. 2022, vol.92, n.4, pp.446-453. Epub Dec 09, 2022. ISSN 1665-1731. https://doi.org/10.24875/acm.21000227.
Objective:
The myocardial efficiency index (MEI) correlates the Myocardial Oxygen Consumption (MVO2) with the Maximum Oxygen Consumption (VO2max), this index provides information about the cardiovascular efficiency (CVEf). In athletes, the MEI improves after a micro-cycle training, however in patients with cardiovascular disease undergoing Cardiac Rehabilitation Program (CRP), IEM behavior could be a good estimator related to the improvement training period. The objective of this study was to determine the myocardial efficiency index behavior in patients with heart disease and high cardiovascular risk (HCVR) after a CRP.
Methods:
Ambilective, descriptive, analytical, non-randomized cohort study was conducted. Patients with heart disease of mixed etiology and HCVR admitted to a CRP for 4-6 weeks were selected. All patients performed a maximal exercise test in band before and after the CPR. Thresholds of VO2 peak, METs-load, Double product (DP) and MEI were determined. A cut-off point for the MEI was established using a ROC curve with a value of 7.37, area under the curve: 0.68 (95% CI 0.61 - 0.76, p < 0.001), sensitivity 0.60 and 1-specificity 0.35.
Results:
193 patients with a mean age of 62.3 years were included, predominantly men (66.2%). Percentages changes in the MEI-27.1% (p < 0.001),METs-43.1% (p < 0.001),DP 5.7% (p < 0.01), and MVO2: 8.3% (p < 0.01) were observed at the end of CRP.
Conclusions:
Significant change in the MEI were observed after CRP associated to CVEf improvement, suggesting that this parameter could be considered as a good clinical tool in the CRP care programs.
Keywords : Myocardial efficiency index; Myocardial oxygen consumption; Peak oxygen consumption; Cardiac rehabilitation program; Cardiac rehabilitation program and secondary prevention; Double product.