Michael Klein

Michael Klein is a biomedical researcher at the Uniformed Services University of the Health Sciences (USUHS) in Bethesda, MD, specializing in Cardiology with expertise in cellular physiology and cardiac electrophysiology. His work bridges experimental models and clinical applications to address military-relevant cardiac conditions.

His educational background includes:

• BS from University of Massachusetts, Amherst
• MS and PhD from University of Illinois, Urbana-Champaign

Dr. Klein's research centers on cardiac signaling mechanisms using three primary models: isolated swine cardiac myocytes, human iPSC-derived cardiomyocytes, and heterologous ion channel expression systems. Key investigations focus on opioid-induced cardiac toxicity (methadone, loperamide, mitragynine), Kir2 channel regulation governing IK1 current, and medium-throughput functional assessment of cardiomyocyte activity. His work addresses critical gaps in understanding drug-induced arrhythmias and heart failure mechanisms.

Recent publications (2022-2025) demonstrate consistent translational focus on cardiac electrophysiological instability, with strong emphasis on opioid cardiotoxicity and genetic factors in heat-related cardiac events. His studies integrate molecular, cellular, and whole-organ approaches to elucidate arrhythmia mechanisms in military-relevant contexts.

Dr. Klein leads multiple research initiatives including:

• GEMINI: Genetic Contributions to Cardiac Arrest in the Military
• Regulation of IK1 in the Heart
• Cardiovascular Toxicity of Opioids

These projects receive institutional support through USUHS research grants targeting drug-induced rhythm disorders and military health challenges.

His laboratory maintains specialized capabilities in cardiac electrophysiology, optical mapping, and stem cell-derived cardiomyocyte models, facilitating collaborative studies on cardiac toxicity and arrhythmia mechanisms relevant to military medicine.