Hypertension and nephrology

[Hypertension and atrial fibrillation. Part 1. - Epidemiological data. The pathomechanism of PF in hypertension]


OCTOBER 20, 2018

Hypertension and nephrology - 2018;22(05)

[Atrial fibrillation (PF) is the most common arrhythmia on the basis of analyzes conducted in different regions of the world. The main reason for this is the aging of the population. High blood pressure is one of the major factors of mortality in both developed and poor economical countries. The combined presence of the two diseases presents many hazards to our body. The most significant of these is the development of thromboembolic stroke, which is constantly increasing with age. The author analyzes in detail the aetiology called atrial cardiomyopathy, behind which there are complex structural, architectural, contractile and electro-physiological changes and leads to clinical manifestation of PF.]



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Hypertension and nephrology

[The importance of recognition and proper treatment of hypertension and the maintenance of adherence in hypertension care]

NEMCSIK János, PÁLL Dénes, JÁRAI Zoltán

[Hypertension is the leading cause of death and disability-adjusted life years. In the United States hypertension accounts for more cardiovascular (CV) deaths than any other modifiable CV disease risk factor and was second only to cigarette smoking as a preventable cause of death for any reason. In our country the situation is similar. In Hungary the number of subjects with hypertension is approximately 3.5 million and this high prevalence contributes markedly to the poor Hungarian CV morbidity and mortality figures. The recognition of hypertension, the initiation of drug therapy and the long-term follow- up of the patients is mainly the task of primary care. Besides that it inheres high responsibility, this is also a grateful commitment, as hypertension in most of the cases can be treated properly with lifestyle-changes and medications leading to a marked decrease of CV complications, especially stroke. In our review article we would like to focus on the high prevalence of hypertension worldwide as well as in our country, the exact implementation of screening, the risk reduction potential of the proper treatment and the importance of the long-term maintenance of treatment adherence.]

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[Hungarian Vasculitis Registry – results of the first five years]

HARIS Ágnes, TISLÉR András, ONDRIK Zoltán, FILE Ibolya, MÁTYUS János, ZSARGÓ Eszter, DEÁK György, AMBRUS Csaba

[Launching the Hungarian Vasculitis Registry aimed to collect information about prevalence and outcome of our patients with ANCA-associated vasculitis, and treatment protocols of the disease. The on-line data collection has been developing dynamically since its initiation five years ago, presently 278 patients’ files are available. Patients’ mean age is 58.2±14.5 years, 62% are women; their disease is associated with c-ANCA positivity in 51% and p-ANCA in 49%. At diagnosis GFR was 24.6±21.6 ml/min/1,73 m2, that time 29%, during the total follow up 39% of the registered subjects needed dialysis. Renal replacement therapy could be discontinued in 23% of them. In cases with focal histological changes, also with upper respiratory tract and skin involvement dialysis was significantly less frequently necessary, which underlines the importance of early diagnosis. In induction therapy steroid was administered for 94% of the patients, 85% of them got cyclophosphamide, 59% was treated by plasmapheresis, 11% got rituximab. Maintenance treat ment contained steroid in 80%, per os cyclophosphamide in 23%, parenteral cyclophosphamide in 22%, furthermore 40% of the patients got azathioprin, 8 subjects got mycophenolate and 6 got methotrexate. Median follow up was 30 months (IQR 6-78), during which period 20% of the patients died, 5% got kidney transplantation, and 5% were lost to follow up. Median survival was 14.8 years, five years survival was 85%, and ten years survival was 70%. Long term survival in patients with c-ANCA vasculitis seemed better comparing to p-ANCA vasculitis, but when correcting by age this difference disappeared. Predictors of death were age and dialysis dependent renal failure. Relapses developed in 27% of patients, 28% of them presented in the first year, 21% suffered it after five years of care. Collected data by the Hungarian Vasculitis Registry shows our society’s successful professional activity. Our results are comparable to the published data in the literature, yet there are several areas in our care where further improvements are warranted in order to increase our patient’s survival and quality of life.]

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[Relationship between the Mediterranean Diet and the Prevention of High Blood Pressure and Cardiovascular Diseases]

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[The clinical importance of atrial fibrillation - the most frequent arrhythmia - is derived from the fact that it means a 5-fold risk of stroke/systemic embolism which contributes to the increased cardiovascular morbidity/mortality. Long-term oral anticoagulant therapy is a cornerstone of stroke prevention in patients with atrial fibrillation. Until recently Vitamin-K antagonists were the only available therapeutic option but its everyday use has several limitations, eg. bleeding risk, narrow therapeutic range, drug and food interactions and the need of monthly INR-control. The advent of NOAC-s may prevent a lot of difficulties regarding VKA-treatment and lead to as efficacious as and safer therapy than VKAs. These benefits can help better adherence of patients to the anticoagulant therapy which is one of the most important element of more effective stroke prevention. NOACs can be used more safely both in real life and in special patient populations (eg. elderly, type 2 diabetes, chronic kidney injury) than VKAs so they can contribute to effective cardiovascular risk reduction.]

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[The present and future of hypertension-care in Hungary]


[Hypertension is a population disorder of a kind that basically affects the health status, morbidity, mortality, quality of life of the population. The decrease complications its prevalence is favorably influenced by the correct treatment -defined by guidelines-, effective care, reaching and its sustained maintenance of target blood pressure, successful patient-physician co-operation. The importance of cooperation between the patient- physician- assistants- pharmacist is emphasized by numerous international organizations. The general quality of the health care system, the extensive use of the unified information system and the modern tools of telemedicine are increasingly important. The degree of drug adherence is also extremely important. According to our own experience, 40% of patients did not take the prescribed drugs in the second to third months of therapy. The Home Blood Pressure Measurement, Blood Pressure Monitoring as well as the patient education and drug revenue check mediated by smartphones, increase adherence. Real progress would mean that, like the care of heart failure, hypertension outpatients clinic (within the university centers, and the hospital departments of the county) would provide the therapeutic controll and care of the hypertensive patients.]

Clinical Neuroscience

[Efficacy of anticoagulation with vitamin K antagonists in acut stroke patients with atrial fibrillation - Hungarian results]

SAS Attila, CSONTOS Krisztina, LOVÁSZ Rita, VALIKOVICS Attila

[Background and objective - An estimated 20% of ischemic strokes are of cardiogenic origin, half of which is associated with atrial fibrillation (AF). Anticoagulation treatment of patients with this arrhythmia reduces their risk of stroke. Effectiveness and safety of oral anticoagulant therapy with vitamin K antagonists (VKA) is limited, however, by their well-known narrow therapeutic window and the substantial inter- and intraindividual variability of INR values depending on genetic and dietary factors as well as drug interactions. Our objective was to evaluate the prevalence of adequate anticoagulation and the level of anticoagulant effect actually achieved among patients with AF hospitalized for acute stroke. Methods - Patients with AF admitted to our hospital ward in 2012 for acute stroke (n=226) were included in the analysis. Using descriptive statistics, relevant clinical and therapeutic characteristics of the patients were assessed, with special reference to the INR values on admission (among patients with known AF), and the clinical outcomes. Results - Of the study cohort, 170 patients had a diagnosis of AF before the admission for stroke, but 47% of them did not take anticoagulants. Patients who suffered stroke while on anticoagulants (83 on VKA, 7 on low-molecular-weight heparins), were in most cases (75%) out of the therapeutic INR range, typically undertreated (INR<2). Overall, inadequate or completely absent anticoagulation was documented in 81% of the stroke cases occurring in patients with known AF. Of the entire study cohort, 41% was discharged home, 34% required continued institutional care, and 25% died. Conclusions - The inadequacy or lack of anticoagulation was observed in the vast majority of acute strokes in patients with known AF. These cases are often related to the well-documented limitations of VKA therapy in terms of its safety, tolerability and/or practical aspects. To prevent them, important changes are warranted in the anticoagulation practice, including the closer control of VKA therapy and the broader use of new oral anticoagulants.]

Clinical Neuroscience

[Effective, safe stroke prevention with novel oral anticoagulants in patients with atrial fibrillation. Focus on dabigatran]

SZAPÁRY László, FEHÉR Gergely, BOSNYÁK Edit, DELI Gabriella, CSÉCSEI Péter

[Non-valvular AF is the most common cardiac arrhytmia. Its incidence increases with age. AF is an independent risk factor for ischaemic stroke, representing a five times higher risk for it, associated with a high mortality rate. Beside AF, there are several other risk factors which influence the risk of stroke. Stroke risk calculator can be used to assess the risk of patient having a stroke. The most endangered group of patients with AF are those who have already suffered from cerebrovascular event. The only effective medication for prevention of stroke due to AF had been the application of vitamin K antagonists (VKA) which considerably decrease the rate of ischaemic event in a patient with AF providing that the INR is in the therapeutic range. VKA have several limitations of use in clinical practice and the fear of bleeding complications results an underusing of these drugs. Only 50% of all patients treated with VKA reaches the therapeutic range of INR. The breakthrough of prevention of stroke in recent years is undisputedly the coming out of novel oral anticoagulants (NOACs, thrombin and Xa-factor inhibitors). Recent studies suggest that these novel drugs prove the same efficacy as VKA drugs, furthermore dabigatran in a dose of 2×150 mg or apixaban in 2×5mg was statistically superior to warfarin in the prevention of stroke. NOACs have shown a large reduction in intracranial hemorrhage compared with warfarin. They are given as a fixed dose and do not require persistent monitoring making them much more convenient. NOACs at guidelines of European Society of Cardiology act as a preferable drugs in case of ischaemic stroke with AF. Probably the extended use of NOACs in clinical practice will be the mainstream of stroke prevention in the future.]

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[Rivaroxaban in prevention of stroke in patients with atrial fibrillation]


[Atrial fibrillation (AF) is well established risk factor for cardioembolic stroke. With thromboprophylatic treatment we can reduce the risk of stroke in patients with AF. Oral vitamin K antagonists (VKA) such as warfarin and acenocoumarol are effective for stroke prevention in patients with atrial fibrillation. VKAs are associated with several limitations including very narrow therapeutic range, several factors (diet, drugs, alcohol consumption) affecting the effect of VKA and excessive bleeding may occur if INR value not controlled successfully. New oral anticoagulant direct Xa factor inhibitor rivaroxaban has a good therapeutic efficacy in prevention (primary and secondary) of stroke in AF patients. Its advantages are including no need for monitoring, fixed oral dose, not affected by meal, age and body weight, all of them can improve patient adherence. In ROCKET AF trial in patients with AF, rivaroxaban was noninferior to warfarin for the prevention of stroke or systemic embolism. There was no significant between-group difference in the risk of major bleeding, although intracranial and fatal bleeding occurred less frequently in the rivaroxaban group.]