mPAP/CO Slope and Oxygen Uptake Add Prognostic Value in Aortic Stenosis

Sarah Hoedemakers, Nicola Riccardo Pugliese, Jan Stassen, Arnaud Vanoppen, Jade Claessens, Tin Gojevic, Youri Bekhuis, Maarten Falter, Sara Moura Ferreira, Sebastiaan Dhont, Nicolò De Biase, Lavinia Del Punta, Valerio Di Fiore, Marco De Carlo, Cristina Giannini, Andrea Colli, Raluca Elena Dulgheru, Jolien Geers, Alaaddin Yilmaz, Guido ClaessenPhilippe Bertrand, Steven Droogmans, Patrizio Lancellotti, Bernard Cosyns, Frederik H Verbrugge, Lieven Herbots, Stefano Masi, Jan Verwerft

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

BACKGROUND: Recent guidelines redefined exercise pulmonary hypertension as a mean pulmonary artery pressure/cardiac output (mPAP/CO) slope >3 mm Hg·L-1·min-1. A peak systolic pulmonary artery pressure >60 mm Hg during exercise has been associated with an increased risk of cardiovascular death, heart failure rehospitalization, and aortic valve replacement in aortic valve stenosis. The prognostic value of the mPAP/CO slope in aortic valve stenosis remains unknown.

METHODS: In this prospective cohort study, consecutive patients (n=143; age, 73±11 years) with an aortic valve area ≤1.5 cm2 underwent cardiopulmonary exercise testing with echocardiography. They were subsequently evaluated for the occurrence of cardiovascular events (ie, cardiovascular death, heart failure hospitalization, new-onset atrial fibrillation, and aortic valve replacement) during a follow-up period of 1 year. Findings were externally validated (validation cohort, n=141).

RESULTS: One cardiovascular death, 32 aortic valve replacements, 9 new-onset atrial fibrillation episodes, and 4 heart failure hospitalizations occurred in the derivation cohort, whereas 5 cardiovascular deaths, 32 aortic valve replacements, 1 new-onset atrial fibrillation episode, and 10 heart failure hospitalizations were observed in the validation cohort. Peak aortic velocity (odds ratio [OR] per SD, 1.48; P=0.036), indexed left atrial volume (OR per SD, 2.15; P=0.001), E/e' at rest (OR per SD, 1.61; P=0.012), mPAP/CO slope (OR per SD, 2.01; P=0.002), and age-, sex-, and height-based predicted peak exercise oxygen uptake (OR per SD, 0.59; P=0.007) were independently associated with cardiovascular events at 1 year, whereas peak systolic pulmonary artery pressure was not (OR per SD, 1.28; P=0.219). Peak Vo2 (percent) and mPAP/CO slope provided incremental prognostic value in addition to indexed left atrial volume and aortic valve area (P<0.001). These results were confirmed in the validation cohort.

CONCLUSIONS: In moderate and severe aortic valve stenosis, mPAP/CO slope and percent-predicted peak Vo2 were independent predictors of cardiovascular events, whereas peak systolic pulmonary artery pressure was not. In addition to aortic valve area and indexed left atrial volume, percent-predicted peak Vo2 and mPAP/CO slope cumulatively improved risk stratification.

Original languageEnglish
Pages (from-to)1172-1182
Number of pages11
JournalCirculation
Volume149
Issue number15
DOIs
Publication statusPublished - 9 Apr 2024

Bibliographical note

Funding Information:
This research is partially funded by the Limburg Clinical Research Center of Hasselt University, Jessa and ZOL (Belgium; PhD grant), and the research cluster Centrum voor Hart-en Vaatziekten en Klinische Farmacie (CHVZ-KFAR), van de Vrije Universiteit Brussel. The research leading to these results has received funding from the European Union\u2013NextGenerationEU through the Italian Ministry of University and Research under PNRR-M4C2-I1.3 project PE_00000019 \u201CHEAL ITALIA\u201D to Stefano Taddei, CUP I53C22001440006. The views and opinions expressed are those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.

Funding Information:
This research is partially funded by the Limburg Clinical Research Center of Hasselt University, Jessa and ZOL (Belgium; PhD grant), and the research cluster Centrum voor Hart-en Vaatziekten en Klinische Farmacie (CHVZKFAR), van de Vrije Universiteit Brussel. The research leading to these results has received funding from the European Union NextGenerationEU through the Italian Ministry of University and Research under PNRR-M4C2-I1.3 project PE_00000019 HEAL ITALIA to Stefano Taddei, CUP I53C22001440006. The views and opinions expressed are those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them.

Publisher Copyright:
© 2024 Lippincott Williams and Wilkins. All rights reserved.

Keywords

  • Humans
  • Middle Aged
  • Aged
  • Aged, 80 and over
  • Prognosis
  • Echocardiography, Stress/methods
  • Atrial Fibrillation/diagnosis
  • Prospective Studies
  • Aortic Valve Stenosis/diagnosis
  • Cardiac Output
  • Heart Failure/complications
  • Oxygen

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