• Matthias Held, Simon Weiner, Johanna Walthelm, Franziska Joa, Jörg Hoffmann, Gülmisal Güder, and Elena Pfeuffer-Jovic.
• Medizinische Klinik mit Schwerpunkt Pneumologie und Beatmungsmedizin, Standort Missioklinik, Klinikum Würzburg Mitte gGmbH.
• Dtsch. Med. Wochenschr. 2021 Oct 1; 146 (21): e88-e94.

BackgroundThe World Conference on PH recommended differentiation of isolated postcapillary (Ipc) and combined post- and precapillary (Cpc) PH according to pulmonary vascular resistance alone. The aim of this study was the haemodynamic and functional characterization of patients diagnosed IpcPH and CpcPH according to the current recommendation of the latest World Symposium on Pulmonary Hypertension (PH) with an exploratory data analysis.MethodsWe evaluated all consecutive patients presenting at the PH outpatient clinic of Mission Medical Hospital from 2008-2015. All received a complete diagnostic work-up according to the guidelines. We analyzed data of patients with mPAP≥ 25 mmHg and pulmonary capillary wedge pressure (PCWP) > 15 mmHg. We compared anthropometric, hemodynamic and functional data of six-minute walking test (6 MWT), cardiopulmonary exercise testing (CPET) and echocardiography of patients with IpcPH and CpcPH.ResultsOut of 726 patients 58 showed a postcapillary PH: IpcPH: n = 20; CpcPH: n = 38. Patients with IpcPH had a significantly lower mPAP and PVR than patients with CpcPH. Cardiac index was lower in the Cpc-PH group compared to the IpcPH group. Functional capacity did not differ. CpcPH patients showed a higher right/left atrial area (RA/LA)-ratio.Discussion And ConclusionAlthough CpcPH patients showed higher values of mPAP and PVR functional capacity was not worse than in patients with IpcPH. In patients with PH due to left heart disease an elevated RA/LA ratio may indicate CpcPH and invasive diagnostic work-up should be considered.The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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