Objectives: Systemic sclerosis associated pulmonary arterial hypertension (SSc-PAH) is of clinical significance owing to its poor outcome. One of the explanations for the outcome is the co-presence of left heart disease (LHD). The aim of this study is to assess LHD phenotype in patients with SSc and pulmonary hypertension (PH).
Methods: This study included consecutive patients with SSc who underwent right heart catheterisation to diagnose PAH. Heart failure with preserved ejection fraction (HFpEF) was evaluated according to the recommendation of 6th WSPH and to the Framingham criteria.
Results: In total, 76 patients were enrolled in this study. Of them, 42 had PH (mPAP >20 mmHg) with a normal left ventricle ejection fraction (≥50%). Among the 42 patients, four and three patients were classified "HFpEF not excluded" and "HFpEF confirmed" whereas 10 had a clinical diagnosis of HFpEF according to 6th WSPH and Framingham criteria, respectively. These differences were due mainly to relatively low PAWP (<13 mmHg). By a combination of ROC curve and logistic regression analyses, left atrial dimension and left ventricular end-diastolic volume index assessed with echocardiography and cardiac MRI, respectively, had significantly higher predictive values for detecting the complication of HFpEF rather than PAWP.
Conclusions: Morphological evaluation using echocardiography and cardiac MRI, compared with haemodynamic evaluation by PAWP, may better reflect the copresence of LHD phenotype in patients with SSc and PH. Our data would also indicate a limited elevation of PAWP in patients with SSc, PH and HFpEF.