Hypertension and nephrology

[Metformin as an Antihypertensive?]

SIMONYI Gábor

APRIL 08, 2017

Hypertension and nephrology - 2017;21(02)

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Hypertension and nephrology

[Letter to our Readers]

KÉKES Ede, KISS István

Hypertension and nephrology

[Elderly patients with end-stage renal disease, its epidemiology and questions regarding it in Hungary]

SZEGEDI János, KISS István

[The number of elderly people and the kidney disease’s importance connected to it has increased worldwide, therefore the chronic kidney disease became an endemic. Parallel to the dwindling of population the people in it age. Because of the men’s higher mortality rate the proportion of women in the elderly is greater. Prognosis indicates that by 2060 every third citizen will be aged 65 or more. Between 1990 and 2015 the life expectancy at birth increased by 6.95 years in the case of men (in 1990 it was 61.13, and in 2015 it was 72.08) and by 4.9 years in the case of women (in 1990 it was 73.7, and in 2015 it was 78.6) in Hungary. Chronic kidney disease concerns 10 to 14 % of the population and 1% of all of them suffers from end stage kidney failure. In the end of 2015 3.52 million patients received kidney replacement therapy around the globe (2.42 million received hemodialysis, 329000 received peritoneal dialysis and 704 000 lived with transplanted kidneys). Of all the risk factors of chronic kidney disease age, hypertension, diabetes mellitus and obesity stand out as the most important ones. The kidneys’ anatomy and function change in elderly age, making it possible for the kidney disease to manifest in greater numbers. The elderly dialysis patients’ number increases worldwide which is connected to their higher life expectancy and better life prospects which on the other hand ultimately means that more and more patient lives to suffer from kidney disease. It cannot be disregarded either that the increasing number of elderly patients suffering from hypertension or diabetes means that because these are causes of kidney disease, the latter’s numbers are also increasing. International data indicates that in the case of incident ESRD patients their number was between 68-2784 and the older than 75 years was 142-1660 per million population. In Hungary there was 778/pmp and 677/pmp, respectively. In 2015 the ratio of incident dialysis patients the ones aged above 65 was 58,9% in the case of incident patients and 50,3% in the case of prevalent patients. The ratio of the ones aged above 75 was 28,2% in the case of incident patients and 22,6% in the case of prevalent patients. The number of elderly dialysis patients differs by region too. Dialysis treatment started in elderly age requires special knowledge and teamwork, similarly to the question of refusing the treatment. The latter team work, adequate experts (doctors and nurses) and the related professions’ representatives build the foundations of a proper clinical practice.]

Hypertension and nephrology

[First experiences with percutaneous renal denervation in management of resistant hypertension]

SCHULCZ Domonkos, NAGY Ferenc Tamás, THURY Attila, BAJCSI Dóra, FEJES Imola, LETOHA Annamária, CONSTANTINOU Kypros, UNGI Imre, ÁBRAHÁM György, LÉGRÁDY Péter

[Percutaneous transluminal radiofrequency renal denervation is a promising new therapeutic method for the treatment of primary resistant hypertension. The intervention decreases the systemic sympathetic over activation and thus arterial blood pressure. In the 1st Department of Medicine of the University of Szeged, 9 resistant hypertensive patients (2 male, 7 female; mean age: 55.0±4.0 years) had all the conditions were required for renal denervation at the time of interventions were performed. We measured the blood pressure together with the heart rate of the patients on the day preceding the intervention, right after the intervention, at discharge from hospital, then at months 6, 9 and 15. The mean blood pressure was 178/107±7/5 mmHg before the intervention. After denervation mean blood pressure decreased right after the intervention, at discharge from hospital, as well as at months 6, 9 and 15, respectively -15/-17 mmHg; -36/-16 mmHg; -19/-9 mmHg; -27/-21 mmHg and -15/- 16 mmHg. Besides decreasing of blood pressure, the antihypertensive drug therapy also decreased, however, it was not the primary aim of the intervention. No denervation- related intra- or perivascular complications were detected. The findings of our study proved the efficacy and safety of renal denervation in the treatment of primary resistant hypertension, of course with an appropriate patient selection. Our study was not relevant to determine whether this method is accompanied with a significant decrease of cardiovascular morbidity and mortality. Answers may come only based on randomized sham controlled studies with great case numbers.]

Hypertension and nephrology

[Efficacy of a fixed-dose association of amlodipine and lisinopril in grade II and III hypertensive patients]

JOÃO Maldonado, TEIMO Pereira, MARGARIDA Carvalho

[We conducted an observational study, with ambulatory blood pressure monitoring (ABPM), to evaluate the efficacy of a fixed-dose combination of Amlodipine (5 mg) and Lisinopril (20 mg) in grade II and III hypertensive patients, over an 8 week intervention period. Thirty non-medicated hypertensive patients were enrolled, 36% female, with a mean age of 52.44±11.54 years, a body mass index of 28.73±4.54 kg/m2, and brachial office systolic (SBP) and diastolic (DBP) blood pressure of 174.43±15.06 mmHg and 102.83±10.67 mmHg, respectively. All patients performed a 24 hours ABPM at baseline and after a treatment period of 8 weeks with the fixed-dose association. Brachial office blood pressure and routine blood and urine samples were also obtained in both moments. A significant reduction in blood pressure was observed after the treatment with the fixed-dose association. The proportion of patients with controlled ambulatory blood pressure after the treatment was 69%, considering the normalization of the systolic and diastolic ambulatory pressures over the daytime, nighttime and 24 hours. Considering the brachial office blood pressures, the proportion of controlled hypertensive patients reached 79%. A significant improvement was also seen in microalbuminuria (reduction of 37.40 mg/24h; IC: 2.82-71.97; p=0.035) and fasting glycaemia (reduction of 11.53 mg/dl; IC: 3.46-19.61; p=0.007). No side effects were reported during the 8 week treatment period. The treatment of grade II and III hypertensive patients with a fixed-dose association of Amlodipine (5 mg) and Lisinopril (20 mg) during 8 weeks is effective controlling blood pressure. Furthermore, evidences indicate that the efficacy of the association is achieved quickly, safely and with good tolerability.]

Hypertension and nephrology

[How can we improve the chronic renal patient care?]

KULCSÁR Imre

[The author summarizes on the base of forty year’s experience in the field of Hungarian nephrological care, that which are the main developmental problems and possibilities in the clinical nephrology and in dialysis therapy in Hungary recently. There is a clear claim to change in the training of nephrological nurses and nephrologists, and it is very important the organized education of predialysis patients, improving capacity of outpatient nephrological care in his opinion. He recommends organizing the total nephrological care in every county (except nephropathology and renal transplantation) and changing the relevant health law. He emphasizes the importance of conservative care in chronic kidney diseases and home renal replacement therapies. Highly educated nurses must play much more important role in care of dialyzed patients (with more competencies). It is very important planned start in dialysis, and instead of uniform regimes, the therapy provided individually. He suggests measuring of the health-related quality of life regularly and the survival of patients on renal replacement therapy, also. It would be important to determine the residual renal function in dialysis program, monthly. He is considering the phenomenon of “recovery of renal function” and the problem of withdrawal of dialysis.]

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Clinical Neuroscience

Late simultaneous carcinomatous meningitis, temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting with mono-symptomatic vertigo – a clinico-pathological case reporT

JARABIN András János, KLIVÉNYI Péter, TISZLAVICZ László, MOLNÁR Anna Fiona, GION Katalin, FÖLDESI Imre, KISS Geza Jozsef, ROVÓ László, BELLA Zsolt

Although vertigo is one of the most common complaints, intracranial malignant tumors rarely cause sudden asymmetry between the tone of the vestibular peripheries masquerading as a peripheral-like disorder. Here we report a case of simultaneous temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting as acute unilateral vestibular syndrome, due to the reawakening of a primary gastric signet ring cell carcinoma. Purpose – Our objective was to identify those pathophysiological steps that may explain the complex process of tumor reawakening, dissemination. The possible causes of vestibular asymmetry were also traced. A 56-year-old male patient’s interdisciplinary medical data had been retrospectively analyzed. Original clinical and pathological results have been collected and thoroughly reevaluated, then new histological staining and immunohistochemistry methods have been added to the diagnostic pool. During the autopsy the cerebrum and cerebellum was edematous. The apex of the left petrous bone was infiltrated and destructed by a tumor mass of 2x2 cm in size. Histological reexamination of the original gastric resection specimen slides revealed focal submucosal tumorous infiltration with a vascular invasion. By immunohistochemistry mainly single infiltrating tumor cells were observed with Cytokeratin 7 and Vimentin positivity and partial loss of E-cadherin staining. The subsequent histological examination of necropsy tissue specimens confirmed the disseminated, multi-organ microscopic tumorous invasion. Discussion – It has been recently reported that the expression of Vimentin and the loss of E-cadherin is significantly associated with advanced stage, lymph node metastasis, vascular and neural invasion and undifferentiated type with p<0.05 significance. As our patient was middle aged and had no immune-deficiency, the promoting factor of the reawakening of the primary GC malignant disease after a 9-year-long period of dormancy remained undiscovered. The organ-specific tropism explained by the “seed and soil” theory was unexpected, due to rare occurrence of gastric cancer to metastasize in the meninges given that only a minority of these cells would be capable of crossing the blood brain barrier. Patients with past malignancies and new onset of neurological symptoms should alert the physician to central nervous system involvement, and the appropriate, targeted diagnostic and therapeutic work-up should be established immediately. Targeted staining with specific antibodies is recommended. Recent studies on cell lines indicate that metformin strongly inhibits epithelial-mesenchymal transition of gastric cancer cells. Therefore, further studies need to be performed on cases positive for epithelial-mesenchymal transition.

Lege Artis Medicinae

[Thiazide- or thiazide-like diuretics should be used in the treatment of patients with hypertension? Particularities of the situation in Hungary]

VÁLYI Péter

[Diuretics have remained the cornerstone of the antihypertensive treatment since their widespreading in the 1960s. According to the 2018 ESC/ESH Guidelines for the management of arterial hypertension, in the absence of evidence from direct comparator trials and recognizing that many of the approved single-pill combinations are based on hydrochlorothiazide, this drug and thiazide-like indapamide can be considered suitable antihypertensive agents. In the 2018 Hungarian guidelines indapamide is named as the most efficacious diuretic in the treatment of patients with hypertension. The aim of the publication is redefining thiazide- and thiazide-like diuretic use in the treatment of hypertensive patients, with particular attention to presently available hydrochlorothia­zide and indapamide, and their combination drugs in Hungary.]

Lege Artis Medicinae

[Notes on the management of hypertension in chronic kidney disease ]

AMBRUS Csaba

[The prevalence of hypertension among pa­tients with chronic kidney disease is high, reaching more than 80%. Hypertension is both one of the main causes and also the most common consequence of chronic kidney disease. It is also a main factor responsible for the high cardiovascular morbidity and mortality in this patient population. Blood pressure control can improve patient outcomes, lower cardiovascular risk and slow down the progression of kidney dis­ease, irrespective of the underlying cause. The optimal therapy should therefore focus not only on blood pressure reduction but also on renoprotection. Basic understanding of the renal pathophysiology in hypertension and renal effects of various medications is of paramount importance. In this review, we summarized cornerstones of the antihypertensive therapy in patients with chronic kidney disease. The management of patients receiving kidney replacement therapies, such as hemodialysis, peritoneal dialysis or transplanta­tion requires special knowledge and expe­rience, therefore it is not discussed here. The aim of this review was to allow non-nephrologist physicians to take care of their kidney patients with more confidence and effectiveness.]

Lege Artis Medicinae

[The effects of angiotensin receptor blockers on the nervous system in hypertension and dementia]

KOVÁCS Tibor

[The renin-angiotensin system (RAS) is one of the most important mechanisms regarding the pathomechanism and treatment of hyprtension. The most of the elements of the RAS are found in the nervous system too. The effect of angiotensin converting enzyme inhibitors and angiotensin receptor blockers (ARBs) is based on the inhibition of the RAS. ARBs might have a special role in the central nervous system because they do not decrease the production of angiotensin but inhibit its harmful effects mediated through the AT1 receptor while allowing the stimulation of AT2 receptors with resulting pleiotrophic actions. Hypertension is the most important risk factor for stroke and has a negative effect on cognitive functions. Antihypertensive treatment has an effect on the nervous system; in addition to the consequences of the reduced blood pressure, ARBs might provide additional advantages in stroke and dementia prevention.]

Hypertension and nephrology

[Diuretikumok hypertoniában - 2010]

BARNA István

[Diuretics (especially thiazide derivatives and indapamide that also has vasodilator efficacy) are considered as first line treatment in hypertension. They are particularly favourable in the treatment of overweight, elderly, isolated systolic hypertensive patients suffering from type 2 diabetes and metabolic syndrome or in mild renal and cardiac insufficiency. They can be ideally combined with other antihypertensive agents (primarily with angiotensin-converting enzyme inhibitors, angiotensin receptor blocking agents és béta-blockers). If hypertension is associated with left ventricular hypertrophy or stroke indapamide is the appropriate choice. In case of left ventricular dysfunction and heart failure thiazide and/or furosemide is the adequate option. Low dose diuretics have no clinically relevant side effects and reduce cardiac mortality to the same extent as other pharmaceutical interventions.]