[Clinical case of the cardiovascular system involvement in a patient with Charcot-Marie-Tooth disease].

Hereditary motor and sensory type 1A neuropathy (known as Charcot-Marie-Tooth disease) is a disease of peripheral nerves characterized by symptoms of progressive polyneuropathy with preferential damage of distal extremity muscles. Damage to the cardiovascular system is extremely rare and heterogenous in this pathology. This disease is not included in the list of indications for interventional antiarrhythmic aid. We could not find in available literature a clinical description of the development of sinus node dysfunction associated with this pathology. The present clinical report presents a case of detection and successful treatment of a damage to the cardiovascular system that manifested itself as sinus node dysfunction/sick sinus syndrome in the tachy-brady variant. A combination treatment approach using radiofrequency catheter ablation, implantation of a permanent pacemaker, and antiarrhythmic therapy associated with drug and non-drug treatment of motor sensory neuropathy resulted in recovery and long-term maintenance of sinus rhythm as well as in beneficial changes in the patient's neurological status.

[Use of Statins, Anticoagulants, Antiaggregants and Antiarrhythmic Drugs in Patients With COVID-19. The Agreed Experts' Position of Russian Society of Cardiology, Eurasian Association of Therapists, National Society on Atherothrombosis, Societies of Experts in Urgent Cardiology, Eurasian Arrhythmology Association].

This article discusses relevant aspects in the treatment of patients with COVID-19. Up-to-date information about principles for administration of statins, antithrombotics, and antiarrhythmics is presented. The authors addressed in detail specific features of reversing heart rhythm disorders in patients with coronavirus infection and the interaction of antiarrhythmic and antiviral drugs. Recommendations are provided for outpatient and inpatient antithrombotic therapy for patients with COVID-19. Issues of antithrombotic and antiviral drug interaction are discussed.

[Recommendations of the Eurasian Arrhythmology Association (EURA) for the diagnosis and treatment of patients with arrhythmias and conduction disorders during the COVID-19 pandemic].

The beginning of 2020 was characterized by the development of a new coronavirus pandemic (COVID-19). Information about the epidemiology, etiology, pathogenesis, clinical and laboratory diagnostics, as well as prevention and therapy for this disease is constantly being expanded and reviewed. The COVID-19 pandemic creates the need for the emergence of new conditions of specialized care for patients with heart rhythm and conduction disorders [1]. These recommendations are intended for general practitioners, internists, cardiologists, electrophysiologists/arrhythmologists, cardiovascular surgeons, functional diagnostics doctors, anesthesiologists-resuscitators, laboratory diagnostics specialists, health care organizers in the system of organizations and healthcare institutions that provide specialized care to patients with heart rhythm and conduction disorders.

[Combined Approach for Management of the Chronic Heart Failure with Preserved Left Ventricular Ejection Fraction and Permanent Atrial Fibrillation: a Case Report].

The article described a clinical case of a patient with chronic heart failure (CHF) with preserved ejection fraction (CHF-PEF) and permanent normosystolic atrial fibrillation (AF). A 73 year-old man (body mass index, 26.4 kg /m2) with permanent normosystolic AF (duration, 10 years) was hospitalized for augmenting of CHF symptoms. The patient had NYHA II-III functional class CHF and a history of long-standing arterial hypertension. The patient received chronic therapy according to the effective guidelines (angiotensin receptor blockers, diuretics, beta-blockers, and new oral anticoagulants). Transthoracic echocardiography showed a normal ejection fraction (EF) (57 %), a moderate enlargement of the left atrium (48 mm), and moderate left ventricular (LV) hypertrophy. Radiofrequency catheter ablation (RFCA) of left atrial AF was performed. For preparation to the RFCA, the patient was administered propanorm two weeks prior to the procedure. Following external electrical cardioversion (ECV) after RFCA, sinus rhythm did not recover. The patient was prescribed amiodarone, and repeat ECV was performed in a month, which resulted in successful recovery of sinus rhythm. However, due to an increase in serum thyrotropic hormone, amiodaron was replaced with the sotalol therapy (240 mg/day). This resulted in development of symptomatic sinus bradycardia and AF relapse at 3 days after ECV. A dual-chamber cardioverter defibrillator was implanted to the patient; in another three months, repeat AF RFCA was performed with successful recovery of sinus rhythm. During the cardioverter testing for one year, the patient had one more AF episode, which was stopped by external ECV. Also, a 6-hour AF episode occurred at three months after the repeat RFCA. Symptoms of CHF disappeared by the 12th month. The combination therapy administered to the patient with normosystolic permanent AF and preserved EF, which included a pathogenetic therapy for CHF, antiarrhythmic drugs, implantation of a dual-chamber ECV, two sessions of AF RFCA, and repeat external ECVs, provided considerable improvement of CHF symptoms and stable sinus rhythm during a one-year follow-up. The return to sinus rhythm after 10 years of permanent AF necessitated changing the arrhythmia diagnosis to long-standing, persistent AF.

[Clinical Case of Severe Heart Failure Treatment, Produced due to the Development of Arrhythmogenic Cardiomyopathy in a Patient With Permanent Junctional Reciprocating Tachycardia (Coumels Tachycardia) With Additional Left Lateral Accessory Pathway].

Thirty two years old man had history of atrioventricular re-entry tachycardia (AVRT) with concealed left-lateral accessory pathway (AP), 3-5episodes per year, 30-40 minutes duration without hemodynamic compromise. Two years ago patient underwent ablation of concealed left lateral AP. After that tachycardia became malignant (high-frequent 150 beats-min, incessant (lasting up to 18 h/day), resistant to AAD, and led to development of tachycardia-induced cardiomyopathy (EF was 16%, and 2 episodes of pulmonary oedema). During redo EPS we verified AVRT with conduction via decremental retrograde left lateral AP which corresponded to the criteria of permanent junctional reciprocating tachycardia (PJRT). Ablation effectively ceased the arrhythmia. After 18 months of follow up there are no symptoms of heart failure and recurrence of arrhythmia. CONCLUSIONS: We present a case of effective treatment of severe heart failure in a patient with arhythtmogenic cardiomyopathy due to malignant course of incessant tachycardia AVRT with retrograde decremental conduction via left lateral AP. Ablation of AP eliminated of arrhythmia. After 18 months of follow up patient had signs of left ventricle reverse remodeling and had not heart failure symptoms.

[Endocardial Electrophysiological Study in an Asymptomatic Competitive Athlete With Ventricular Preexitation due to Conduction via Fasciculoventricular Accessory Pathway].

We present a clinical case of a rare form of the WPW phenomenon due to anterograde conduction over fasciculoventricular accessory pathway in 20-year-old competitive athlete. The patient had no history of palpitations or syncope. ECG revealed shortening of PQ interval (112 ms) and wide QRS complex due to conduction via accessory pathway. To address the question of participation in competitive activity and the need for ablation the patient underwent endocardial electrophysiological study in the course of which we verified conduction via fasciculoventricular accessory pathway. The result of the study was used in determination of strategy of further management.

[Comparison Clinical Data and Results of Mathematical Modeling in Radiofrequency Ablation of Permanent Atrial Fibrillation: Cardioversion Might Be the Final Stage in the Combined Treatment].

AIM: to compare the theoretical possibility of permanent atrial fibrillation (AF) elimination (on the model of the 6-wave re-entry) result.