[Сardiac arrhythmias in people who have had a coronavirus infection COVID-19: A review].

Heart rhythm disorders are one of the most common complications of coronavirus infection. Heart rhythm disorders can develop in 6-17% of hospitalized patients, and in convalescents, COVID-19 can manifest itself up to 12 months after the completion of the acute phase of the disease. Among the mechanisms for the development of cardiac arrhythmias, there are a direct cytopathic effect of SARS-CoV-2 on the myocardium, systemic inflammatory response syndrome, electrolyte imbalance, hypoxia, the use of antibacterial, antimalarial and antiviral drugs, exudative pericarditis, autonomic dysfunction.

[Features of hemorrhagic fever with renal syndrome with diabetes mellitus].

Aim: Diabetes mellitus (DM) is known to be a risk factor in adverse outcomes and complications in many infectious diseases. In the combination of hemorrhagic fever with renal syndrome (HFRS) and DM there are mutually exclusive pathogenetic States - hyperosmolarity, characteristic of DM is layered on the reduction of osmotic blood pressure in HFRS. Under these conditions, the effect of one disease (DM) on the clinical manifestations of another (HFRS) is not obvious.

[Parameters of clobal longitudinal myocardial deformation and coronary bloodflow in patients with primary hypothyroidism].

Aims: Assessment of global longitudinal strain of left ventricle and coronary bloodflow in patients with primary subclinical hypothyroidism.

Materials And Methods: The study involved 23 women with primary subclinical hypothyroidism of age from 55 to 75 years. Physical examination, transthoracic EchoCG, coronary bloodflow assessment and global LV longitudinal strain by speckle tracking method were performed to all patients.

[Follow-up of patients with Ixodes tick-borne borrelioses caused by Borrelia miyamotoi or Borrelia burgdorferi sensu lato].

Unlabelled: Ixodes tick-borne borrelioses (ITBB) are caused by two different spirochetes: Borrelia from the group of Borrelia burgdorferi sensu lato, the agents of the classic Lyme borreliosis (LB), and Borrelia miyamotoi that belongs to the group of Borrelia causing tick-borne relapsing fevers. ITBB caused by B. miyamotoi (BM-ITBB) is a previously unknown infectious disease discovered in Russia.

[Clinical presentation of "new" tick-borne borreliosis caused by Borrelia miyamotoi].

Aim: The objective of this study was to confirm the role of B. miyamotoi in the etiology of ITBB-WOEM in Udmurtia and to investigate in detail the clinical presentation of this "new" disease.

Materials And Methods: 50 adult patients with ITBB-WOEM treated in Republic Hospital for Infectious Diseases, Udmurtia, in 2010-2011 had PCR-confirmed infection by B.

[Long-term outcomes and formation of chronic disease of the kidneys in patients with a history of hemorrhagic fever with renal syndrome].

Aim: To evaluate renal function, persistence of renal dysfunction and probability of chronic renal pathology in convalescents of hemorrhagic fever with renal syndrome (HFRS).

Material And Methods: A total of 370 HFRS convalescents were examined with estimation of renal functional reserve, albuminuria, uric acid clearance, activity of urine N-acetil-beta-D-hexosaminidase in the urine, 18-h deprevation test, duplex scanning of renal vessels. Correlation between prevalence of chronic renal failure in Udmurtia and HFRS incidence was analysed.

[Arterial hypertension, its metabolic aspects and kidney function in patients after hemorrhagic fever with renal syndrome].

Aim: To characterize late convalescence after hemorrhagic fever with renal syndrome (HFRS), i.e. metabolic disorders and their relation with arterial pressure (AP) and renal function.

[Clinicophysiological assessment of physical performance in patients recovering from hemorrhagic fever with renal syndrome].

Tolerance of physical load was investigated in 50 convalescents of hemorrhagic fever with renal syndrome (HFRS) at bicycle exercise test (BET). Calculations were made of maximal oxygen consumption and energy consumption at the threshold load. It is shown that for three months after HFRS physical performance of the convalescents remained low.

[Clinicofunctional characteristics of the heart in hemorrhagic fever with renal syndrome].

A clinicofunctional analysis of the heart was made in 50 patients suffering from hemorrhagic fever with renal syndrome (HFRS) in the acute period and at the stage of outpatient rehabilitation. Comparison with healthy subjects was made by physical, ECG, echo-CG data, changes in the levels of creatinphosphokinase (MB-fraction) (CPK-MB), asparagine and alanine aminotransferase in the serum. Clinical symptoms of heart pathology, their incidence rate in different periods of the disease, dynamics of ECG deviations, state of heart chambers and left ventricular systolic function are described.

[Functional loading tests in nephropathy examination in patients recovering from hemorrhagic fever with renal syndrome].

Aim: To characterize nephropathy in patients recovering after hemorrhagic fever with renal syndrome (HFRS) using functional loading tests.

Materials And Methods: In 65 HFRS convalescents we examined renal function under water deprivation, exercises and studied intraglomerular hemodynamics.

Results: After 2-month follow-up renal functional reserve was absent in 34% of the convalescents indicating intraglomerular hypertension.

[The hemodynamic and laboratory biochemical characteristics of the nephropathy in convalescent patients after hemorrhagic fever with renal syndrome].

Laboratory and functional tests were made in 50 convalescents who had suffered hemorrhagic fever with renal syndrome (HFRS). It is shown that nephropathy in such patients runs with a decline in renal functional reserve indicative of intraglomerular hypertension, impaired ability of the kidneys for osmotic urine concentration, defective tubular reabsorption of beta 2-microglobulin, microcirculatory disorders, collagen disbolism, high levels of uric acid in the blood. The occurrence of hyperuricemia and intraglomerular hypertension in HFRS convalescents calls for special consideration as leading nonimmune factors of nephropathy progression.

[The clinical, hemodynamic and hormonal-metabolic effects of the calcium-antagonist treatment of middle-aged and elderly patients with IHD at the polyclinic stage of rehabilitation].

160 presenile and senile CHD patients received calcium antagonists nifedipine, verapamil, diltiazem. The highest antianginal effect occurred after a course of verapamil with special effect in those functionally compromised. Rheoencephalographic picture was dependent on the initial functional class of the patient and overall treatment efficacy.