Features of indicators of macrohemodynamics and systemic inflammation in patients with community-acquired pneumonia combined with gastroesophageal reflux disease

Abstract

Relevance. The clinical course, treatment approaches, and outcomes of community-acquired pneumonia (CAP) often depend on microcirculatory disorders. The significant prevalence of gastroesophageal reflux disease (GERD) in the population determines the frequency of CAP. Study of the pathogenetic basis of the combined course of CAP in individuals with GERD, incl. microcirculation systems, can target correction paths and increase the effectiveness of therapy.Objective. To identify indicators of systemic inflammation and macrohemodynamics in patients with CAP combined with GERD.Material and methods. A total of 123 patients were under observation, incl. with mild CAP without signs of GERD (group I) — 38, with CAP and GERD — 49 (group 2), and 36 patients with GERD without CAP — group 3. In all patients with CAP, along with traditional studies, the concentrations of C-reactive protein (CRP) and brain natriuretic peptide (BNP) were determined in the blood, and echocardioscopy (EchoCS) was performed to determine the end systolic (ES) and diastolic (ED) volumes of the left ventricle (LV) and right ventricles (RV), blood flow velocity at the level of the pulmonary artery (Vmax PA), pressure gradients ΔPmax at the level of the tricuspid valve (TV), PA, and LV isovolumic relaxation time (IVRT). Control values for indicators were obtained from 34 practically healthy donors.Results. In all patients with CAP, at the beginning of therapy, intoxication and respiratory syndromes were observed, and pneumonia was diagnosed on an X-ray. Patients in groups II and III had characteristic symptoms of GERD. Blood tests revealed leukocytosis in all patients with CAP. The initial CRP concentration in group 1 was 5.2, group 2 — 7.7, group 3 — 1.2 times higher than normal. The initial concentration of BNP in all groups did not differ from the control. By discharge, CRP levels in all patients had decreased: however, in group II, they remained higher than in healthy people (2.6 times (p < 0.05) and higher than in group I, 1.3 times (p < 0.05). Before discharge, the BNP level in group II increased by 1.2 times compared with baseline in group I, in healthy individuals, and in group III. When analyzing the EchoCS indicators in group II patients, a significant increase in the initial indicators of LV EDV and LV ESV and decrease in EF and IVRT were observed. After treatment, no significant dynamics of volume and velocity parameters were observed in patients in group II; in patients in group I, pressure gradients at the TC and PA levels remained slightly reduced.Conclusions. An increase in CRP levels in patients with GERD characterizes low-intensity inflammation, which potentiates systemic inflammation in patients with CAP combined with GERD and is accompanied by an increase in BNP.