the study analyzed he relationship between blood serum lipids and periodontal condition, as well as the relationship between the left ventricular mass index and the condition of periodontium. The study included 261 subjects--140 women and 121 men. Mean age of the subjects was 38 years. The condition of periodontal tissues during the study was evaluated with the help of the CPITN index (Community Periodontal Index of Treatment Needs). The study was performed at Kaunas University of Medicine (KMU) Clinic of Dental and Oral Diseases. Laboratory blood lipid studies were performed at the laboratory of the Hospital of Kaunas University of Medicine (HKUM). The studies included the determination of the total blood cholesterol level, triglyceride level, HDL cholesterol level, and LDL cholesterol level (mmol/l). Patients with hypertension (102 patients) underwent ultrasound examination of the heart at KMU Clinic of Cardiology. On the basis of the findings of the ultrasound study, left ventricular mass index (g/m(2)) was calculated. The findings of our study showed that there was no difference in the blood serum concentration of total cholesterol, triglycerides, HDL cholesterol, and LDL cholesterol between people with healthy periodontium and those with gingivitis or periodontitis. Mean rank of the left ventricular mass index in subjects with healthy periodontium or gingivitis (CPITN codes 0, 1, 2) was 48.3, and in subjects with periodontitis (CPITN codes 3, 4) - 61.36 (p<0.05).