Conclusion
Infective endocarditis is an uncommon but serious complication in HCM that can occur in patients with or without LVOTO. Septic embolization and valve lesions are common in these patients. IE patients with HCM might have a poor prognosis compared to those without HCM and should receive cardiac surgery as early as possible.
Mortality is high but similar to that found in patients with or without indication for endocarditis prophylaxis. However, predisposing factors and Streptococci infections are more frequent among native-valve HCM patients.