Characteristics of functional state of arteriolar and venular skin microvessels in patients with essential arterial hypertension. 2014

Andrey A Fedorovich, and Anatoly N Rogoza, and Novella M Chikhladze
New Diagnostic Methods Department, Russian Cardiology Research and Production Complex, 3-rd Cherepkovskaya Street, 15-a, Moscow 121552, Russia; Laboratory of Physiology and Biomechanics Cardiorespiratory System, Institute of Bio-Medical Problems, Russian Academy of Sciences, Khoroshevskoye Shosse, 76-a, Moscow 123007, Russia. Electronic address: faa-micro@yandex.ru.

The aim of the study was to evaluate the vasomotor activity of skin precapillary arterioles, depending on the condition of blood outflow from the capillary bed in patients with essential arterial hypertension (AH). The study included 30 normotensive subjects (NT) and 63 patients with AH, who were tested with a laser Doppler flowmetry with wavelet analysis of blood flow oscillations on the right forearm and ambulatory blood pressure monitoring (ABPM) on the left shoulder. Antihypertensive therapy was stopped for all patients 14 days prior to the experiment or AH was diagnosed for the first time. The hypertensive patients were divided into 2 groups, depending on the amplitude of the respiratory blood flow oscillations in skin microvessels. The first group included 30 patients without blood outflow violations of the capillary bed (AHVN), the second group consisted of 33 patients with various intensity of functional disorders in venular sector of microvasculature (AHVS). If the value of the amplitude of blood flow oscillations can be related to the tone" definition, then AHVN patients have a significant increase in neurogenic component of vascular tone (p<0.002) and violation of microvessel vasomotor endothelial function (p=0.065) in regard to NT, and AHVS patients to NT have a significant reduction of myogenic component tone of precapillary arterioles (p<0.05). AHVN patients compared to AHVS patients have a higher precapillary arteriolar tone due to endothelial (p<0.01), neurogenic (p<0.01) and myogenic (p<0.01) components of the vascular tone. Despite the lower values of the precapillary arteriolar tone, AHVS patients have higher BP values both at daytime (p<0.0005), and in nocturnal hours (p<0.05), and the functional state of venular sector is connected with nocturnal BP reduction. Obtained results indicate that hypertensive patients can have significant differences in the functional state of microvessels. The assessment of the initial skin microvasculatory regulatory mechanism status could potentially be useful for individual choice of antihypertensive therapy.

UI MeSH Term Description Entries
D006973 Hypertension Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more. Blood Pressure, High,Blood Pressures, High,High Blood Pressure,High Blood Pressures
D008297 Male Males
D008833 Microcirculation The circulation of the BLOOD through the MICROVASCULAR NETWORK. Microvascular Blood Flow,Microvascular Circulation,Blood Flow, Microvascular,Circulation, Microvascular,Flow, Microvascular Blood,Microvascular Blood Flows,Microvascular Circulations
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009131 Muscle, Smooth, Vascular The nonstriated involuntary muscle tissue of blood vessels. Vascular Smooth Muscle,Muscle, Vascular Smooth,Muscles, Vascular Smooth,Smooth Muscle, Vascular,Smooth Muscles, Vascular,Vascular Smooth Muscles
D009991 Oscillometry The measurement of frequency or oscillation changes. Oscillometries
D012039 Regional Blood Flow The flow of BLOOD through or around an organ or region of the body. Blood Flow, Regional,Blood Flows, Regional,Flow, Regional Blood,Flows, Regional Blood,Regional Blood Flows
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D004730 Endothelium, Vascular Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components. Capillary Endothelium,Vascular Endothelium,Capillary Endotheliums,Endothelium, Capillary,Endotheliums, Capillary,Endotheliums, Vascular,Vascular Endotheliums
D005260 Female Females

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