This comprehensive Nature Reviews Disease Primers paper provides an authoritative overview of pulmonary hypertension (PH) globally, with particular attention to disparities between high-income (HICs) and low- and middle-income countries (LMICs). Key Points Classification and Prevalence: pulmonary hypertension is defined as mean pulmonary artery pressure >20 mmHg and comprises five groups: Group 1 (pulmonary arterial hypertension/PAH […]

INTRODUCTION Ever wondered how we went from completely misunderstanding blood flow for 1,400 years to performing open-heart surgery? A fascinating historical review by Prof. Adam Torbicki, published in Diagnostics (2021), reminds us that while most modern clinicians “look forward, expecting new pathophysiological pathways to be explored,” few take time “to look into the past.” Yet