Observational studies, another defense of digoxin, CTO-PCI, BP measurement, and a possible revolution in cardiovascular protection are the topics John Mandrola, MD, discusses in this week’s podcast. This podcast is intended for healthcare professionals only. To read a partial transcript or to comment, visit: https://www.medscape.com/twic I. Observational Research Yeh; Credibility in Observational  Research https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.123.064645 Hernan; Causal Language in Observational Research  https://ajph.aphapublications.org/doi/full/10.2105/AJPH.2018.304337 Wang; RCT Duplicate Initiative https://jamanetwork.com/journals/jama/fullarticle/2804067 II. Defense of Digoxin Brophy; Beta Blockers, Digoxin, or Both https://doi.org/10.1016/j.cjca.2023.06.009 Dorian editorial https://doi.org/10.1016/j.cjca.2023.07.013 Ziff Digoxin Meta-analysis https://www.bmj.com/content/351/bmj.h4451.long DIG trial  https://www.nejm.org/doi/full/10.1056/nejm199702203360801 Davila Analysis of DIG Trial https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6801940/ Kotecha Meta-analysis of Beta Blockers https://pubmed.ncbi.nlm.nih.gov/25193873/ RATE-AF https://jamanetwork.com/journals/jama/fullarticle/2774407 III. CTO-PCI PCI of Chronic Total Occlusions Improves Angina, Quality of Life in Trials https://www.medscape.com/viewarticle/994739 JAMA Network Open Meta-analysis IV. BP Measurement One Size Doesn’t Fit All in Blood Pressure Measurement https://www.medscape.com/viewarticle/995216 Ishigami Blood Pressure Measurement Comparison https://jamanetwork.com/journals/jamainternalmedicine/article-abstract/2807853 V. GLP-1 SELECT Trial Semaglutide Cuts Cardiovascular Events in Landmark Trial https://www.medscape.com/viewarticle/995270 SELECT Protocol Paper You may also like: Medscape editor-in-chief Eric Topol, MD, and master storyteller and clinician Abraham Verghese, MD, on Medicine and the Machine https://www.medscape.com/features/public/machine The Bob Harrington Show with Stanford University Chair of Medicine, Robert A. Harrington, MD. https://www.medscape.com/author/bob-harrington Questions or feedback, please contact news@medscape.net