Features of rheoencephalography in children with primary mitral valve prolapse
Annotation. Mitral valve prolapse (MVP), as a manifestation of connective tissue dysplasia, is of great interest in the field of medicine. It occupies an important place in the structure of diseases of the cardiovascular system, which is mainly due to its high incidence and possible complications. MVP is detected in almost 2–3% of the population. In addition, this pathology with a genetic predisposition is a manifestation of a connective tissue defect and is rare in newborns and at an early age, which characterizes it as a progressive disease. At the moment, the features of cerebral hemodynamics in children with MVP are not well understood. The aim of our study was to study cerebral hemodynamics in children with primary mitral valve prolapse using quantitative indicators of rheoencephalography (REG). The study included patients with primary MVP. Under our supervision, there were 106 children aged 13 to 17 years. The control group included 23 healthy children at the same age. All children underwent a REG with quantitative indicators. In children with MVP, there is a variability in the results of REG in the cerebral hemispheres. Vascular elasticity is significantly reduced due to anacrot time increase (p<0.001), which, in fact, is characteristic of the hypertonic type of blood flow (57.5%). It can be argued that in children there is a hypovolemic type of blood flow in the form of a decrease in the rheographic index relative to the control group (p<0.05). There is a tendency to vascular tone tension of all calibers according to the absence of statistically significant deviations of the corresponding indicators (dictrotic index and the ratio of the duration of the ascending phase to the duration of the entire pulse wave). The same picture is observed with venous blood flow, according to the values of the dystolic index in the carotid artery basin. In the basin of the vertebral artery there is a tendency to increase the tone of small vessels and venous vessels. Thus, in children with mitral valve prolapse, cerebral blood flow changes in the form of hypovolemia in the carotid artery basin and normovolemia in the vertebral artery basin according to REG parameters; in this group of children with MVP, there is a tendency to tension in the tone of blood vessels of all calibers according to the absence of statistically significant deviations of the corresponding indicators (dictrotic index and the ratio of the duration of the ascending phase to the duration of the entire pulse wave). Also, patients with MVP should be constantly monitored by narrow specialists (cardiologists, neurologists) for timely and adequate recovery.
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