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As 2023 ends, we can reflect on another productive year in cardiology research. Our Top Stories feature is an opportunity to highlight some of the most important published studies. Briefly, we had a great shootout between torsemide and furosemide, new evidence on an optimal step count, and a trial weighing in on whether extracorporeal membrane oxygenation (ECMO) improves survival for people with cardiogenic shock. We learned about whether iron replacement improves outcomes for people with heart failure and reduced ejection fraction, whether ablation is better than antiarrhythmic drugs for improving psychological distress in people with atrial fibrillation, and more about the management of chronic limb ischemia. And we gained valuable data o…