Lege Artis Medicinae

[Differential diagnosis and treatment of hyponatraemia]

NÉMETH Zsófia, DEÁK György

SEPTEMBER 20, 2018

Lege Artis Medicinae - 2018;28(08-09)

[Hyponatraemia (serum sodium concentration < 136 mmol/l) is the most frequent electrolyte abnormality that inceases the risk of both in-hospital, and outpatient mortality. Antidiuretic hormone action or low glomerular fitration rate or low excretable osmoles or their combination are involved in its pathogenesis. Differential diagnosis is based on medical and medication histories, serum- and urine osmolality and urine sodium concentration. Measurement of fractional excretions of urea and uric acid help identifying low effective circulting volume, renal hypoperfusion. Symptomatic hyponatraemia or an acute decrease of serum sodium concentration exceeding 10 mmol/l should be treated with 3% NaCl to avoid impending threat to life. The principles of the treatment of chronic hyponatraemia are restriction of water intake and elimination of etiologic factor(s) (eg. medications - most often thiazides). In case of contracted axtracellular volume, isotonic saline should be given. In case of euvolaemia, restriciton of water intake is fundamental. In case of expanded extracellular volume, (heart failure, liver cirrhosis, nephrosis), water and NaCl intake should be restricted along with aldosteron antagonist and loop diuretic therapy. In chronic hyponatraemia, the rise of serum sodium concentration should not exceed 10 mmol/l during the first 24 hours and 8 mmol/l/day thereafter. ]



Further articles in this publication

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[Feeding and eating in infancy and early childhood part III. - Development of self-feeding skills in the large-sample of the “For Healthy Offspring” project ]

NÉMETH Tünde, VÁRADY Erzsébet, DANIS Ildikó, SCHEURING Noémi, SZABÓ László

[Feeding and eating in infancy and early childhood part III. - Development of self-feeding skills in the large-sample of the “For Healthy Offspring” project INTRODUCTION - After introducing adequate complementary food to the diet of breastfed/formula-fed babies, the frequency and amount of semisolid/solid food is increasing, the breastmilk/formula intake is decreasing and finally the weaning process is completed. During this process the developing feeding skills of the infant enables them to self-feed. The self-feeding infant and toddler should participate in family meals. SUBJECTS AND METHODS - In the Healthy Offspring project self reported questionnaires were received from 1133 parents of 0-3 year old children. Issues concerning the development of self-feeding skills were analyzed. RESULTS - With advancing age the proportion of infants/toddlers, reported to be able to (partially) self-feed, has increased. The age, at which the majority of toddlers (83.1%) were reported to self-feed, was at 13-15 months. By the age over 2 years 57.2% of the toddlers were fully self-feeding, 39.3% were self-feeding with some assistance, and 3.5% were still completely fed by their mother/caregiver. While self-feeding became more prevalent, the proportion of toddlers with feeding problems and insufficient weight gain has increased. With more prevalent complementary feeding more parents assessed their feeding style rather scheduled than on demand. In the whole sample the proportion of infants/toddlers, who ate with the family, was 43.8%. CONCLUSIONS - In our sample, as previously described in the scientific literature, the developmental readiness to self-feed has developed in the majority of infants by the age of 13-15 months. During progres­sion of weaning an increasing proportion of parents thought, that feeding was rather scheduled than on demand. This finding points at the importance of educating parents about the importance of responsive feeding during and after weaning. For self-feeding toddlers, responsive feeding means, that the mother/caregiver offers a choice of healthy and adequate amount of food, at a proper place, at proper times, responds to the hunger and satiety cues of the child and the toddler decides, whether to eat, what and how much to eat.]

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[The László Romics Awards – an Acknowledgment by Love ]

KUN J. Viktória

Lege Artis Medicinae

[The liaison between internal medicine and psychiatry can be life-saving in the treatment of severe anorexia nervosa]

SZÉNYEI Gábor, BENE László, TÚRY Ferenc

[INTRODUCTION - In the severe forms of anorexia nervosa hospitalization may be required, and the somatic treatment is provided in a department of internal medicine. In such cases, collaboration between internist and psychiatrist is essential. Psycho­logical support is necessary even in the period of nutritional rehabilitation. This can be applied in the framework of consultation-liaison psychiatry. After the initial weight gain providing psychotherapy in an outpatient setting is fundamental. In the case of anorexic patients who maintain a close relationship with the family, family therapy is the most effective treatment. CASE REPORT - A 26-year old female patient with anorexia was hospitalized in a department of internal medicine after an extreme emaciation, her body mass index was 11.6. During this period there was a psychiatric consultation involving the fa-ther of the patient as well. Her body weight increased, and outpatient family therapy was initiated. Fifteen family sessions were conducted in nine months, with special focus on the separation-individuation process. At the end of the therapy a full remission could be observed, with a normal body weight, and her periods returned. After a four-month follow-up her state was stable, and she got married. CONCLUSION - Interdisciplinary collaboration can be cardinal when somatic and psychological disorders are interwoven. The role of family therapy is crucial in those cases where emotional separation from the family of origin is difficult, even if the patient does not live with the parents any longer. ]

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[Jan Veth and his Portraits of Notable Peers ]


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Related contents

Hypertension and nephrology

[Water intoxication caused by diuretics]

RADÓ János, KOVÁCS Andrea

[Water metabolism in the organism is regulated very exactly under normal circumstances. Sometimes, however, when the level of the antidiuretic hormone is inappropriately high and fluid consuming is not limited, water intoxication can develop. This is especially paradoxical during treatment with diuretics. Authors observed in a cachectic, potassium wasting, 87-year-old female patient, hyponatremia associated with clinical water intoxication developing in a hot period of summer, during long-term thiazide diuretic (chlorthalidone) treatment administered because of high blood pressure. Diagnosis was based besides the clinical picture on the severe hyponatremia and was supported by the relatively high urine osmolality in the presence of a very low plasma osmolality. Despite treatment of hyponatremia in accordance to the recommandations “overcorrection” occurred and turned into fatal hypernatremia. In the period of low plasma osmolality the patient was treated with intravenous infusions containing isotonic saline supplemented with potassium. When hypertonicity developed hypotonic intravenous infusions were given. Authors discuss the literature of hyponatremia with special reference to the dilemmas of therapy such as “slow” versus “rapid” correction as well as procedures to be done in case of “overcorrection”.]

Lege Artis Medicinae

[Experience with coenzyme Q10 in heart failure]

KOHUT László

[INTRODUCTION - The protein complex coenzyme Q10 (CoQ10) has a role in ATP production as a mitochondrial electron transport molecule, and it also has a strong antioxidant effect. Several studies have proved the correlation between the decrease in CoQ10 level and the severity of heart failure. Heart failure is a multifactorial syndrome, the development of which is greatly influenced by an abnormal energy metabolism. CASE REPORT - The 61-year-old woman developed heart failure after a myocardial infarction. She complained of fatigue, dyspnoea and reduced physical endurance even with optimal treatment. When her therapy was completed by CoQ10, her endurance and life quality significantly improved and her symptoms ameliorated. CONCLUSIONS - Medical treatment of chronic heart failure is an evidence-based, complex therapy. Despite the complex management, morbidity and mortality of this condition remain high. A number of studies have shown that CoQ10 substitution can improve the clinical and haemodynamical parameters of patients with heart failure. On the basis of these results, the use of CoQ10 as an adjuvant therapy to complex treatment has an increasing role.]

Lege Artis Medicinae

[The importance of endothelial dysfunction and possibilities of its treatment in chronic heart failure]


[Endothelial cells - under autocrine and paracrine control - may have a central role in the regulation of vascular tone. Endothelial dysfunction is a very early sign of heart failure but the clinical consequence is not well understood. Recent evidence suggests that upregulation of the neuro-endocrine-, and the renin-angiotensin-aldosterone system would lead to increased tissue- and circulating angiotensin-II levels. Elevated concentration of angiotensin-II provides a mechanism by which vasomotor responses to nitric oxide, prostaglandins are blunted, while the effects of vasoconstrictors such as thromboxans, endothelin and chatecholamins are enhanced. The higher basal vascular tone leads to the degeneration and atrophy of skeletal muscle, moreover to the the ischaemic damage of myocardial cells. Because renin-angiotensinaldosterone system is under genetic control, the deleterious effects of angiotensin-II depends on the angiotensin-converting enzyme gene. Pharmacological attempts to counteract endothelial dysfunction in heart failure may include the angiotensin-converting enzyme inhibitor, which can potentially improve the endothel dependent vasodilatation response. The importance of measuring endothelial function by non-invasive techniques is yet unknown, thus, before we introduce the widespread testing of patients for endothelial function, more research has to be done.]

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[The rennin-angiotensin system plays a major role in cardiovascular diseases. In the past decade, extensive research investigated the possible clinical benefit of the use of angiotensin-converting enzyme inhibitors in various clinical conditions. Their benefits have been clearly demonstrated in many cardiovascular conditions and agreement as to their potential usefulness has been established in chronic heart failure, asymptomatic left ventricular dysfunction, acute myocardial infarction and hypertension, and in the primary prevention in patients with high risk for cardiovascular events. Numerous randomised clinical trials over the past two decades established their efficacy in reducing adverse outcomes (mortality, hospitalitazion, and physical limitation) in patients with heart failure and left ventricular systolic dysfunction. Based on these results, angiotensin-converting enzyme inhibitors are indicated in all patients with left ventricular systolic dysfunction regardless of etiology, in the absence of intolerance or a contraindication. Despite the recent improvements in the treatment of heart failure, mortality remains high, with approximately 50% patients dead at five years. Although angiotensinconverting enzyme inhibitors decrease mortality, they incompletely suppress angiotenzin-2 when used chronically. Since angiotensin receptor blockers block the biologic effects of angiotenzin-2 more completely than angiotensin-converting enzyme inhibitors, they may be beneficial in the treatment of heart failure. In comparison trials, angiotensin receptor blockers were found to have no benefit over angiotensin-converting enzyme inhibitor therapy. Thus, angiotensin-converting enzyme inhibitors should remain first-line treatment for heart failure. However, in case of intolerance, angiotensin receptor blocker therapy is a reasonable substitute and provides excellent tolerability.]

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[Clinical trials for evaluating cardiovascular safety of SGLT-2- inhibitor drugs in patients with type 2 diabetes]


[SGLT-2-inihibitors are considered as a new class among oral antidiabetic drugs. The first derivatives of this class became available in the last couple of years in Hungary. According to the requirements from regulatory bodies, randomized, controlled clinical trials have been initiated in order to evaluate the cardiovascular safety of nearly all new antidiabetic drugs in patients with type 2 diabetes. Among SGLT-2-inhibitors, only one trial with empagliflozine has been completed so far. Based on the endpoints of the EMPA-REG OUTCOME trial a significant decrease in different cardiovascular events and total mortality was observed in type 2 diabetic patients with elevated cardiovascular risk. The exact pathomechanism of this beneficial effect has not been clearly understood. Currently, the position statements and scientific guidelines clearly describe the place of SGLT-2-inhibitor drugs in the treatment algorithm; the beneficial effect of empagliflozine on cardiovascular events should seriously be considered when making therapeutic decision. Together with the results of ongoing studies with SGLT-2-inhibitors (dapagliflozine: DECLARE, canagliflozine: CANVAS), these data will provide a more robust evidence about the cardiovascular safety of this new class of oral antidiabetic drugs. ]