Underfilling decreases left ventricular function in pulmonary arterial hypertension

Research output: Contribution to journalArticle

Abstract

To evaluate the association between impaired left ventricular (LV) longitudinal function and LV underfilling in patients with pulmonary arterial hypertension (PAH). Thirty-nine patients with PAH and 18 age and sex-matched healthy controls were included. LV volume and left atrial volume (LAV) were delineated in short-axis cardiac magnetic resonance (CMR) cine images. LV longitudinal function was assessed from atrio-ventricular plane displacement (AVPD) and global longitudinal strain (GLS) was assessed using feature tracking in three long-axis views. LV filling was assessed by LAV and by pulmonary artery wedge pressure (PAWP) using right heart catheterisation. Patients had a smaller LAV, LV volume and stroke volume as well as a lower LV-AVPD and LV-GLS than controls. PAWP was 6 [IQR 5––9] mmHg in patients. LV ejection fraction did not differ between groups. LV stroke volume correlated with LV-AVPD (r = 0.445, p =.001), LV-GLS (r = − 0.549, p < 0.0001) and LAVmax (r =.585, p < 0.0001). Furthermore, LV-AVPD (r =.598) and LV-GLS (r = − 0.675) correlated with LAVmax (p < 0.0001 for both). Neither LV-AVPD, LV-GLS, LAVmax nor stroke volume correlated with PAWP. Impaired LV longitudinal function was associated with low stroke volume, low PAWP and a small LAV in PAH. Small stroke volumes and LAV, together with normal LA pressure, implies that the mechanism causing reduced LV longitudinal function is underfilling rather than an intrinsic LV dysfunction in PAH.

Details

Authors
Organisations
External organisations
  • Skåne University Hospital
  • Karolinska Institutet
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Radiology, Nuclear Medicine and Medical Imaging
  • Cardiac and Cardiovascular Systems

Keywords

  • Cardiac magnetic resonance imaging, Feature tracking strain, Left atrial volume, Left ventricular dysfunction, Pulmonary hypertension
Original languageEnglish
JournalInternational Journal of Cardiovascular Imaging
Publication statusE-pub ahead of print - 2021 Jan 27
Publication categoryResearch
Peer-reviewedYes