Feasibility of a Novel Augmented 6-Minute Incremental Step Test: A Simplified Cardiorespiratory Fitness Assessment Tool.
JACC Adv
; 3(8): 101079, 2024 Aug.
Article
en En
| MEDLINE
| ID: mdl-39099774
ABSTRACT
Background:
The cardiopulmonary exercise test (CPET) is considered a gold standard in assessing cardiorespiratory fitness (CRF) but has limited accessibility due to competency requirements and cost. Incorporating portable sensor devices into a simple bedside test of CRF could improve diagnostic and prognostic value.Objectives:
The authors sought to evaluate the association of an augmented 6-minute incremental step test (6MIST) with standard CPET.Methods:
We enrolled patients undergoing clinically indicated supine cycle ergometry CPET with invasive hemodynamics (iCPET) for the same-day 6MIST. CRF-related variables were simultaneously recorded using a signal morphology-based impedance cardiograph (PhysioFlow Enduro) and a portable metabolic analyzer (VO2 Master Pro) during incremental pace stationary stepping. The correlation between CPET and hemodynamic parameters from both tests was assessed using the intraclass correlation coefficient (ICC).Results:
Fifteen patients (mean age 60 ± 14 years, 40% female, 27% Black) were included. All patients who agreed to undergo 6MIST completed the study without any test-related adverse events. We observed good to excellent correlation between iCPET- and 6MIST-measured CPET parameters peak heart rate (ICC = 0.60; 95% CI 0.15-0.85), absolute peak O2 consumption (VO2) (ICC = 0.77; 95% CI 0.44-0.92), relative peak VO2 (ICC = 0.64; 95% CI 0.20-0.86), maximum ventilation (ICC = 0.59; 95% CI 0.13-0.84), O2 pulse (ICC = 0.71; 95% CI 0.33-0.89), and cardiorespiratory optimal point (ICC = 0.82; 95% CI 0.52-0.94). No significant correlation was determined between iCPET and 6MIST in measuring cardiac index at rest (ICC = 0.19; 95% CI -0.34 to 0.63) or at peak exercise (ICC = 0.36; 95% CI -0.17 to 0.73).Conclusions:
We demonstrate the feasibility of a novel augmented 6MIST with wearable devices for simultaneous CPET and hemodynamic assessment. 6MIST-measured CPET parameters were strongly correlated with the iCPET-derived measurements. Additional studies are needed to confirm the validity of the 6MIST compared to standard upright CPET.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
JACC Adv
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos