Pulmonary hypertension associated with left heart disease

Area of Science:

• Cardiology
• Pulmonology
• Medical Research

Background:

• Left heart disease (LHD) is the primary cause of pulmonary hypertension (PH).
• Accurate classification of PH in LHD, as isolated post-capillary (ipcPH) or combined post- and pre-capillary (cpcPH), is crucial for management.
• Existing treatments for pulmonary arterial hypertension are not recommended for PH-LHD outside clinical trials due to potential harm.

Purpose of the Study:

• To review recent clinical trials and propose strategies for improving outcomes in PH-LHD.
• To emphasize the importance of precise phenotyping and diagnosis in managing PH-LHD.
• To introduce a novel staging system for PH-LHD to guide therapeutic approaches.

Main Methods:

• Review of randomized clinical trials related to PH-LHD.
• Development of a new staging system for PH-LHD (Stages A-D).
• Analysis of diagnostic criteria for differentiating ipcPH and cpcPH in a hemodynamic grey zone.

Main Results:

• Reinforced recommendations against using pulmonary arterial hypertension therapies in PH-LHD.
• Proposed a PH-LHD staging system based on disease progression.
• Highlighted the need to consider specific PH-LHD subtypes, including valve stenosis and cardiomyopathies.

Conclusions:

• Improved phenotyping and a new staging system are key to optimizing PH-LHD management.
• Individualized diagnosis and treatment strategies are essential for better patient outcomes.
• Further research using novel methodologies like pragmatic trials is needed to engage LHD patients.