Left ventricular function and exercise performance in idiopathic dilated cardiomyopathy: role of tissue Doppler imaging

Elena Zambon, Annamaria Iorio, Concetta Di Nora, Cosimo Carriere, Elena Abate, Marco Merlo, Giulia Barbati, Andrea Di Lenarda, Bruno Pinamonti, Piergiuseppe Agostoni, Gianfranco Sinagra

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: To examine the relationship between left ventricular (LV) function evaluated at echocardiography and exercise performance in idiopathic dilated cardiomyopathy (IDCM) patients.

METHODS AND RESULTS: We enrolled 76 consecutive IDCM patients in sinus rhythm, undergoing cardiopulmonary exercise testing and echocardiography [49 ± 13 years old; LV ejection fraction 31 ± 7%, LV end-diastolic volume 96 ± 31 ml/m; peak oxygen consumption (peak VO2/kg) 18 ± 5.6 ml/kg/min]. Linear regression analysis revealed that peak systolic velocity (S') (r = 0.46; P < 0.001) and E/E' (r = -0.43; P < 0.001), two tissue Doppler imaging derived parameters, were related to peak VO2/kg, whereas ejection fraction and mitral inflow variables were not. Considering the 69 patients (90%) without diastolic restrictive pattern (a well known index of severe diastolic dysfunction), multivariate regression analysis showed that age, E/E' and S' were the only independent variables related to peak VO2/kg. Similarly, age and E/E' were confirmed as independent parameters for the prediction of ventilation/carbon dioxide production slope in the whole population.

CONCLUSION: In IDCM patients, cardiopulmonary exercise performance variables were strongly related to E/E' and S'.

Original languageEnglish
Pages (from-to)230-236
Number of pages7
JournalJournal of Cardiovascular Medicine
Volume18
Issue number4
DOIs
Publication statusPublished - Apr 2017

Keywords

  • Adult
  • Cardiomyopathy, Dilated
  • Echocardiography, Doppler
  • Exercise Test
  • Exercise Tolerance
  • Female
  • Heart Failure
  • Humans
  • Linear Models
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Oxygen Consumption
  • Predictive Value of Tests
  • Registries
  • Retrospective Studies
  • Stroke Volume
  • Time Factors
  • Ventricular Function, Left
  • Journal Article

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