AUTHOR=Christen Marla , Buergin Aline , Mademilov Maamed , Mayer Laura , Schneider Simon R. , Lichtblau Mona , Sooronbaev Talant M. , Ulrich Silvia , Bloch Konrad E. , Furian Michael TITLE=Electrocardiographic signs of cardiac ischemia at rest and during exercise in patients with COPD traveling to 3,100 m: data from a randomized trial of acetazolamide JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2025.1524201 DOI=10.3389/fcvm.2025.1524201 ISSN=2297-055X