Analysis of the traditional risk factors influence on development of ischemic heart disease in familial hypercholesterolemia

Abstract

Familial hypercholesterolemia (FH) is inherited pathology with increased level of cholesterol, and predisposes for early development of atherosclerosis, but prevalence of cardiovascular pathology in FH patients varies, and demands for more precise definition of additional factors of risk of ischemic heart disease (IHD). Aim. To evaluate in FH patients an association of IHD and classical risk factors (sex, age, arterial hypertension (AH), smoking, obesity, cholesterol of low density lipoproteides (LDL-C) and high density (HDL-C), complicated heredity for cardiovascular disorders), mutation of LDL receptors. Material and methods. Totally, 253 patients studied, age 18 and older, with heterozygous FCHE, diagnoses according to Dutch Lipid Clinic Network, (mean age — 51±3,4 y. o.). 109 patients (43%) underwent genetic test. IHD was diagnosed in 106 (41,8%), anamnesis of acute myocardial infarction (MI) had 63 (24,9%) patients. Results. In FH, IHD was associated with the following risk factors: AH, age older 40 y., complicated inheritance for cardiovascular pathology. An increase of LDL-C level by every 1 mM increased the prevalence of CHD in heterozygous FCHE patients by 4,5% up to LDL-C 8,5 mM/L. In higher LDL-C values IHD prevalence increases by 1-2%. In patients with mutation of LDL receptor, IHD develops 5 years earlier. There was no association revealed for the type of mutation and IHD. Conclusion. The main risk factors associated with CHD in heterozygous FH are AH, age more than 40 y. o., complicated inheritance for cardiovascular diseases. The relation of LDL-C and IHD prevalence in FH patients is not linear.