Short- and Long-Term Outcomes of Patients With Hypertrophic Cardiomyopathy After Noncardiac Surgery: A Single-Center Retrospective Study

Objective: Although several studies have demonstrated that noncardiac surgery in patients with hypertrophic cardiomyopathy (HCM) is safe, the long-term outcomes remain unclear. Therefore, the authors investigated the postoperative long-term outcomes of patients with HCM who underwent noncardiac surgery at their hospital. Design: Retrospective review. Setting: Single university hospital. Participants: Seventy-two consecutive patients with HCM who underwent noncardiac surgery. Intervention: No intervention. Measurements and Main Results: The incidence of HCM-related events during the patient's hospital stay were evaluated as the short-term outcomes, and HCM-related events after discharge were evaluated as the long-term outcomes. HCM-related events were defined as sudden death, implantable cardioverter-defibrillator discharge with successful recovery from cardiopulmonary arrest, death due to heart failure, hospitalization for heart failure, myocardial infarction, and thrombosis caused by atrial fibrillation. The median postoperative follow-up was 1,382 days (3.8 years). Short-term mortality and morbidity rates were both 1.3%, whereas long-term mortality and morbidity rates were 4.2% and 15%, respectively. The 5-year event-free rate was 76%, whereas the postoperative HCM-related mortality rate was 4.2%. Conclusions: This study suggests that noncardiac surgery in patients with HCM is safe in terms of both short- and long-term outcomes. To confirm the findings, additional studies, such as prospective, multicenter, observational studies, should be conducted.