Learning and research

Methamphetamine-associated pulmonary arterial hypertension (Meth-PAH) is an increasingly prevalent but understudied subtype of Group 1 pulmonary arterial hypertension (PAH).

Noninvasive imaging markers may be helpful in identifying higher-risk patients with various lung diseases. Pulmonary artery to aorta ratio (PA/A ratio) on computed tomography (CT) is an indicator of pulmonary hypertension, but its relationship with other hemodynamic, imaging, and physiologic measurements, functional status, and outcomes requires further investigation.

Catheter-directed intervention (CDI) in patients presenting with pulmonary embolism (PE) is suggested to improve in-hospital outcomes. We aimed to compare the effect of early versus late initiation of CDI on in-hospital outcomes. 

Pulmonary hypertension (PH) associated with left heart disease (LHD-PH) and pulmonary hypertension associated with chronic lung disease (CLD-PH) are the most common PH subtypes but lack effective treatments. 

Intermediate–high-risk (IHR) pulmonary embolism (PE) represents a heterogeneous group in whom guideline-based criteria may insufficiently capture biologic and hemodynamic variability relevant to early deterioration. Data-driven phenotyping may improve risk stratification and support individualized decisions regarding reperfusion therapy. In this retrospective cohort study (2012–2025), 553 guideline-defined IHR PE patients were analyzed using unsupervised machine learning.

In this single-blind, crossover pilot study, supplemental oxygen at 2 L/min during 6-min walk test reduced Cardiac Effort in patients with pulmonary arterial hypertension, while 6-min walk distance remained unchanged.

Vasoreactivity, which refers to the reduction of mean pulmonary arterial pressure in response to inhaled vasodilators, is a well-established metric for prognostication and treatment selection in patients with pulmonary arterial hypertension. 

Considering the beta-3 adrenoceptor agonist, mirabegron, may display vasodilator and cardioprotective properties, we investigated the therapeutic potential of mirabegron in monocrotaline-induced pulmonary hypertension in rats.

Early graft dysfunction following lung transplantation is commonly attributed to primary graft dysfunction (PGD). However, other rare etiologies may present with similar clinical and radiologic features. We report a unique case of a 58-year-old male with idiopathic pulmonary fibrosis who underwent bilateral lung transplantation.