Report summary

For University of Michigan–ann Arbor Department of Cardiac Surgery in 2015-2026, the graph shows 44 visible PIs and 208 internal PI collaborations. The dominant subject mix is Medicine as the leading field (57% of slots across 39 PIs; 39 labels), Surgery as the leading subfield (19% of slots across 21 PIs; 21 labels), and Cardiac Valve Diseases and Treatments as the leading topic (8% of slots across 11 PIs; 11 labels). That is a healthy pattern, with enough links to reveal several interpretable groups rather than one undifferentiated component. The top weighted PIs are Francis D. Pagani (41.4 weighted works; Mechanical Circulatory Support Devices, Cardiac Structural Anomalies and Repair); Shinichi Fukuhara (39.2 weighted works; Cardiac Valve Diseases and Treatments, Infective Endocarditis Diagnosis and Management). The most visible ties are Donald S. Likosky and Michael P. Thompson (41 shared works, weight 20.3). The standout breakdown groups are group 1 with 10 PIs, 12 internal connections, weight 102.6, around Cardiology and Cardiovascular Medicine, Pulmonary and Respiratory Medicine, Epidemiology, led by Shinichi Fukuhara, Himanshu J. Patel, Bo Yang.