Arteriovenous Fistula/complications; Coronary Sinus/abnormalities; Coronary Vessel Anomalies/complications; Endocarditis, Bacterial/complications; Mitral Valve/microbiology; Pulmonary Embolism/etiology; Streptococcal Infections/complications; Streptococcus mitis/isolation & purification; Anti-Bacterial Agents/therapeutic use; Anticoagulants/therapeutic use; Arteriovenous Fistula/surgery; Atrial Fibrillation/etiology; Bacteremia/complications; Bacteremia/drug therapy; Bacteremia/microbiology; Ceftriaxone/therapeutic use; Combined Modality Therapy; Coronary Disease/complications; Coronary Disease/surgery; Endocarditis, Bacterial/diagnostic imaging; Endocarditis, Bacterial/drug therapy; Endocarditis, Bacterial/microbiology; Endocarditis, Bacterial/surgery; Heart Valve Diseases/drug therapy; Heart Valve Diseases/etiology; Heart Valve Diseases/microbiology; Heart Valve Diseases/surgery; Humans; Ligation; Male; Middle Aged; Mitral Valve/surgery; Pulmonary Embolism/diagnostic imaging; Pulmonary Embolism/drug therapy; Pulmonary Embolism/microbiology; Streptococcal Infections/diagnostic imaging; Streptococcal Infections/drug therapy; Streptococcal Infections/microbiology; Streptococcal Infections/surgery; Tricuspid Valve/microbiology; Tricuspid Valve/surgery; Ultrasonography