[Clinical and economic analysis of the use of dapagliflozin in patients with chronic heart failure with reduced left ventricular ejection fraction in various subgroups of standard therapy in the Russian Federation].

AIM: To evaluate the clinical and economic effectiveness of dapagliflozin in patients with chronic heart failure (CHF) with reduced left ventricular ejection fraction (HFrEF) in the Russian Federation in various subgroups of standard therapy for CHF. MATERIALS AND METHODS: A clinical and economic analysis of the use of the drug dapagliflozin in addition to standard therapy was carried out in comparison with standard therapy in various subgroups of standard therapy for HFrEF using a modeling method. Cost calculations were carried out in a mathematical model adapted to the healthcare conditions of the Russian Federation by using Russian cost indicators and characteristics of the patient population. RESULTS: The present study demonstrates that the addition of dapagliflozin is beneficial in terms of clinical and cost-effectiveness, regardless of the initial regimen (angiotensin receptor-neprilysin inhibitors [ARNI] or angiotensin-converting enzyme inhibitors [ACEi]/angiotensin II receptor blockers [ARB]) of standard drug therapy for HFrEF and in all cases leads to an increase in life expectancy, a decrease in the number of hospitalizations and emergency visits due to CHF, as well as cardiovascular mortality. The obtained values of added value per additional year of life in all cases are significantly lower than the willingness-to-pay threshold, which indicates the clinical and economic effectiveness of the strategy of prescribing dapagliflozin as part of standard therapy for patients with HFrEF. In the case of adding dapagliflozin the values of the additional cost of an added year of life in the 3 considered standard therapy options (ARNI or ACEi/ARB, only ACEi/ARB and only ARNI) were 291,256, 279,571 and 338,374 rubles respectively. Thus, the scenario of using dapagliflozin with standard therapy, which included only ACEi/ARB, is characterized by the lowest additional cost and has the best clinical and economic characteristics. At the same time the scenario of use with standard therapy, which included only ARNI, is characterized by the highest value of the additional value of the added year of life.

[A clinical and economic analysis of the use of dapagliflozin in patients with chronic heart failure in the entire spectrum of left ventricular ejection fraction in the Russian Federation].

AIM: To estimate the cost-effectiveness of dapagliflozin across the range of ejection fraction in patients with heart failure (HF) in Russian Federation. MATERIALS AND METHODS: Cost-effectiveness model was developed for estimate the use of dapagliflozin as part of standard therapy in patients with HF regardless of ejection fraction is unknown. The calculation of costs was carried out in a mathematical model adapted to the conditions of Russian healthcare system by using Russian costs inputs and patient population characteristics. RESULTS: In the model, dapagliflozin therapy yielded a mean of 0.209 additional life-years compared with standard of care in 10 years horizon. The incremental cost of 1 additional life-year was 665,715 RUB, which does not exceed the threshold of willingness to pay 2,235,202 RUB. CONCLUSION: Thus, the intensification of chronic HF therapy with dapagliflozin is cost effective. The use of dapagliflozin in a cohort of 1000 target patients over 10 years will avoid 146 hospitalizations and 39 emergency visits due to HF, as well as prevent 32 deaths from cardiovascular diseases.

Analysis of the impact on the health care budget and consumers of the use of the preparation of omega-3 acid ethyl esters90 in the treatment of patients with atherogenic dyslipidemia.

Aim      To evaluate economic results of using omega-3 acid ethyl esters 90 for primary prevention of cardiovascular catastrophes in patients with residual hypertriglyceridemia (HTG).Material and methods  The economic evaluation of using the medicine omega-3 acid ethyl esters 90 in the system of drug provision of the population of the Russian Federation was performed by analyzing the effect on the budget using a pharmacoeconomic model developed with the Microsoft Office Excel 2016 software. The effect of omega-3 acid ethyl esters 90 was evaluated in 555 643 patients with residual HGT (Moscow). The study lasted for one year. Results of the meta-analysis by A.A. Bernasconi et al. (2020) were used as a source of efficacy data. The following direct and indirect medical expenses for treatment of cardiovascular complications of residual HTG were taken into account in this study: expenses for drug therapy; expenses for therapy and rehabilitation for nonfatal complications; expenses for fatal outcomes; state support for disability; foregone per capita gross domestic product resulting from losses of earnings due to temporary incapacity to labor by people of work-able age; and salary payments for temporary incapacity to work.Results Using omega-3 acid ethyl esters 90 in 555 643 patients with residual HTG will allow preventing 1 437 fatal ischemic cardiovascular complications (including 564 deaths from ischemic heart disease and 1 128 cases of myocardial infarction (MI), including 558 fatal cases of MI). Furthermore, the difference in expenses compared to the high-dose statin treatment alone will be 359 252 253 rubles or 0.32 %.Conclusion      The results of this comprehensive pharmacoeconomical study showed that the use of omega-3 acid ethyl esters 90 in patients with residual HGT is an economically preferrable strategy compared to high-dose statin treatment alone and does not influence significantly the budgetary expenses as a part of the State Guarantee of Free Medical Care to the Citizens of the Russian Federation (increase in expenses by 0.32 % compared to the current practice). At the same time, the use of omega-3 acid ethyl esters 90 results in a 10% decrease in the number of fatal ischemic cardiovascular complications.

The economic burden of chronic thromboembolic pulmonary hypertension in Russian Federation.

AIM: The aim of current study was to estimate the economic burden of the chronic thromboembolic pulmonary hypertension (CTEPH) in Russia based on patient registry. MATERIALS AND METHODS: Cost of illness study was based on data derived from CTEPH patient registry that was developed at the Division of hypertension of FSBI "National Medical Research Center of Cardiology". Demographic and clinical patient characteristics were analyzed with descriptive statistic methods. Cost of illness study was performed from the state perspective and with bottom-up approach. Bootstrapping was used for calculation of average costs per patient/year. Within the study direct costs (medical costs: outpatient, inpatient, emergency, PAH-specific therapy, concomitant therapy; non-medical costs: pension due to disability status, payments for patients on sick-leave) and indirect costs (loss in GDP) were estimated. RESULTS: Overall, 113 CTEPH patients (67 women and 46 men) from 33 Russian regions were included, mean age of patients with CTEPH was 54.6±13.95 years. Most of the patients (55%) were in able-bodied age. It was found that about half of patients with diagnosed CTEPH had a disability. Average duration of disease at the time of analysis was 6.88±11.41 years. Period from the first occurrence of symptoms to the confirmation of diagnosis of CTEPH was 2.58±5.21 years on average. More than 70% of patients had III and IV FC (WHO) at the time of diagnosis. Mean number of outpatient visits was 1.97±1.65 per patient/year, and inpatient visits were reported for 59% of patients. About 54% of patients used PAH-specific therapy, moreover 46% patients had interruptions of PAH-specific therapy (58.4±66.3 days). The total costs of CTEPH per patient/year were calculated as 805,901 RUB. The overall burden of CTEPH in Russia for total CTEPH population (470 patients) was 379 million RUB per year. CONCLUSION: CTEPH is the rare disease that is characterized with later diagnosis due to absence of disease-specific symptoms. Therefore economic burden of the CTEPH is significantly low in comparison to widespread cardiovascular diseases. Development of network of expert PH-centers and increase of the access for PAH-specific therapy will help to increase the quality of health care for patients with CTEPH.

[Optimization of BP Control and Arterial Elasticity With Fixed Combination Therapy Perindopril and Amlodipine In Patients With Arterial Hypertension and Increased Pulse Wave Velocity].

The aim of the study was to assess the possibility of fixed combination perindopril+amlodipine to improve arterial elesticity in patients with hypertension and high pulse wave velocity, despite previous combination antihypertensive therapy. In an open, multicenter, observational study duration of 24 weeks 80 patients were included, divided into 4 equal-sized groups, depending on initial antihypertensive therapy: Group 1 - the combination of ACE inhibitor and diuretic, Group 2 - the combination of ACE inhibitor and calcium channel blocker, Group 3 - the combination of diuretic and angiotensin receptor blocker, Group 4 - the combination of angiotensin receptor blocker and calcium antagonist. All patients underwent ambulatory BP monitoring, applanation tonometry (assessment of augmentation index and central blood pressure), pulse wave velocity measurement. According to the office BP measurements fixed combination perindopril+amlodipine provided the SBP reduction by 17.5%, 15.6%, 15, 6%, 15.5% and 17.7%, DBP reduction by 14.6%, 12.9%, 13.8%, respectively, in groups ACEI+D initial combination therapy, ACEI+AC initial combination therapy, ARB+D initial combination therapy, ARB+AC initial combination therapy. According ABPM data SBP has been decreased by 12.2%, 12.4%, 11.3%, 12.6% and DBP by 14.3%, 11.1%, 8.9%, 12.6%. The fixed combination perindopril+amlodipine reduced PWV by 25.2%, 21.6%, 23.1%, 23.0%, augmentation index by 43.4%, 48.9%, 41.5%, 38.3%, central SBP by 16.1%, 15.5%, 14.4%, 15.2%, the central DBP by 15.1%, 13.8%, 13.8%, 18.0% (p<0.01 vs. baseline). CONCLUSIONS: Fixed combination perindopril+amlodipine provides goal blood pressure control, improves arterial elasticity indexes (augmentation index, PWV, central blood pressure). Additional properties include reduction of BMI and lipid metabolism improving in patients initially treated with a combination antihypertensive therapy.

[Optimization of Control of Blood Pressure, Metabolic Disorders and Target Organs Protection With Fixed Perindopril and Indapamide Combination in Treated Patients With Arterial Hypertension].

PURPOSE: to assess the potential of fixed perindopril/indapamide combination (FPIC) to improve angioprotection in patients with arterial hypertension (AP) with various efficacy of preceding therapy with combination of losartan and hydrochlorothiazide (HCTZ). MATERIAL AND METHODS: We included in this open study 50 patients with AP divided into two equal-sized groups in dependence on the achievement of target blood pressure (BP) less than 140/90 mm Hg on preceding therapy with losartan (100 mg) and HCTZ (12.5 mg). All patients underwent ambulatory BP monitoring (ABPM), applanation tonometry (assessment of augmentation index and central blood pressure), measurement of pulse wave velocity (PWV), laboratory tests (lipid profile, fasting glucose, HOMA index, homocysteine, leptin, adiponectin, high sensitivity C reactive protein [hsCRP]). Study duration was 12 weeks. RESULTS: Treatment with FPIC in patients not at target BP provided 14.5 and 6.6% reduction of systolic and diastolic BP (SBP and DBP), respectively (p<0.01), while in patients with target BP it was associated with additional reductions of SBP and DBP by 3.9 and 5.4%, respectively (p<0.01). According to ABPM data average day- and nighttime SBP decreased by 16.9 and 15.0%, average day- and nighttime DBP - by 10.6 and 13.6% (p<0.01) in the group of patients not at target BP. Reductions of PWV (by 15.2 and 2.2%), augmentation index (by 10.7 and 9.4%), central SBP (by 10.9 and 2.1%), central pulse BP vascular age (by 8.7 and 6.0%) were observed in groups of patients without and with target BP on preceding therapy, respectively (p<0.01). Leptin level decreased by 10.0 and 14.4%, hsCRP - by 17.7 and 11.0%; while level of adiponectin increased by 6.7 and 9.9% (p<0.01). CONCLUSION: Our results demonstrated advantages of FPIC over losartan+HCTZ combination relative to BP control, improvement of arterial elasticity, alleviation of insulin resistance and inflammation.

Picosecond opto-acoustic interferometry and polarimetry in high-index GaAs.

By means of a metal opto-acoustic transducer we generate quasi-longitudinal and quasi-transverse picosecond strain pulses in a (311)-GaAs substrate and monitor their propagation by picosecond acoustic interferometry. By probing at the sample side opposite to the transducer the signals related to the compressive and shear strain pulses can be separated in time. In addition to conventional monitoring of the reflected probe light intensity we monitor also the polarization rotation of the optical probe beam. This polarimetric technique results in improved sensitivity of detection and provides comprehensive information about the elasto-optical anisotropy. The experimental observations are in a good agreement with a theoretical analysis.

Coherent magnetization precession in ferromagnetic (Ga,Mn)As induced by picosecond acoustic pulses.

We show that the magnetization of a thin ferromagnetic (Ga,Mn)As layer can be modulated by picosecond acoustic pulses. In this approach a picosecond strain pulse injected into the structure induces a tilt of the magnetization vector M, followed by the precession of M around its equilibrium orientation. This effect can be understood in terms of changes in magnetocrystalline anisotropy induced by the pulse. A model where only one anisotropy constant is affected by the strain pulse provides a good description of the observed time-dependent response.