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Prognostic value of cardiopulmonary exercise testing in Idiopathic Dilated Cardiomyopathy

Gianfranco Sinagra1, Annamaria Iorio1, Marco Merlo1

  • 1Cardiovascular Department, Azienda Sanitaria Universitaria Integrata di Trieste "Ospedali Riuniti" and University of Trieste, Italy.

International Journal of Cardiology
|August 26, 2016
PubMed

Insights

Cardiopulmonary exercise testing (CPET) effectively predicts outcomes in Idiopathic Dilated Cardiomyopathy (iDCM) patients. Percent-predicted peak oxygen consumption (peak VO2%) and VE/VCO2 slope are stronger predictors than peak VO2/kg.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Heart Failure Research

Background:

  • Cardiopulmonary exercise testing (CPET) is crucial for heart failure (HF) risk stratification.
  • Prognostic data for Idiopathic Dilated Cardiomyopathy (iDCM) using CPET remain limited.

Purpose of the Study:

  • To evaluate the prognostic value of CPET in a large cohort of iDCM patients.
  • To identify the most accurate CPET parameters for predicting adverse cardiovascular events in iDCM.

Main Methods:

  • Analysis of 381 iDCM patients undergoing CPET.
  • Endpoint: composite of cardiovascular death or urgent heart transplantation (CVD/HTx).
  • Statistical analysis including multivariable prediction models.

Main Results:

  • Peak oxygen consumption (peak VO2%) and VE/VCO2 slope demonstrated superior accuracy in predicting CVD/HTx compared to peak VO2/kg.
  • Optimal thresholds for prediction were <60% for peak VO2% and >29 for VE/VCO2 slope.
  • Multivariable analysis confirmed peak VO2% and VE/VCO2 slope as independent predictors of CVD/HTx.

Conclusions:

  • Percent-predicted peak oxygen consumption (peak VO2%) and VE/VCO2 slope are the strongest prognostic CPET variables in iDCM patients.
  • These findings highlight the utility of specific CPET metrics for risk stratification in iDCM.
  • Further prospective studies are warranted to validate these prognostic indicators.
Abstract

Keywords:
Cardiopulmonary exercise testingHeart failureIdiopathic Dilated CardiomyopathyPrognostic risk stratification

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