Orthopedic surgeons and patients are confronting a growing challenge as more adults with pacemakers and defibrillators require joint replacement procedures. The intersection of cardiac technology and elective surgery creates previously unrecognized perioperative risks that extend beyond the operating room. Analysis of nearly 14,000 matched patients undergoing total shoulder arthroplasty reveals that cardiac implantable electronic devices significantly elevate complication rates across multiple organ systems. Within 90 days of surgery, patients with these devices experienced markedly higher rates of cardiac events, kidney dysfunction, infections, and neurological complications compared to matched controls without devices. The risk amplification persisted even when researchers controlled for underlying heart disease, suggesting the devices themselves—rather than just cardiovascular comorbidity—contribute to surgical vulnerability. Most concerning, patients who underwent shoulder replacement within six months of device implantation faced the highest complication burden, indicating optimal surgical timing requires careful coordination between cardiac and orthopedic teams. This finding challenges the conventional wisdom that established cardiac devices pose minimal surgical risk. The data emerges from real-world clinical practice rather than controlled trials, reflecting actual outcomes across diverse medical centers. For the aging population increasingly dependent on both cardiac devices and joint replacements, these results demand updated perioperative protocols. The research suggests that current risk stratification models may underestimate complications in this growing patient subset, potentially requiring extended monitoring periods and modified surgical approaches to optimize safety outcomes.