Lege Artis Medicinae

[Oxford Pocketbook of Clinical Specialties]

NÉMETH Éva

SEPTEMBER 30, 1992

Lege Artis Medicinae - 1992;2(09)

[In medicine today, two opposing trends can be observed: on the one hand, scientific curiosity inevitably drives researchers to penetrate into the smallest corners of the body's structure, into the most hidden secrets of its functioning, and to learn about what is happening at the molecular level in the course of research into disease processes. This is leading not only to a sharp separation between disciplines, but also to an increasing specialisation of knowledge in ever narrower areas within each discipline. ]

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Lege Artis Medicinae

[Echocardiography in the management of acute myocardial infarction]

LENGYEL Mária

[The author presents a detailed review of the role of echocardiography (echo) in the management of acute myocardial infarction (AMI). The echo diagnosis of AMI is based on segmental wall thinning and akinesia with a 90% accuracy. Echo has made a major impact on the immediate diagnosis of mechanical complications in the hemodynamically compromised patient with AMI. These mechanical complications which include myocardial rupture of the free wall or the septum or the papillary muscle, may be successfully treated by prompt surgical intervention. Echo diagnosis has an important role in the management of other complications of the acute, subacute and chronic phases of infarction as well, such as pericardial effusion, left ventricular thrombus, left ventricular aneurysm and pseudoaneurysm. Therapeutic strategies are thoroughly affected by systolic and diastolic function assessed by echo. Echo has a basic role in the algorithm of postinfarction anticoagulant treatment. Besides rest echo, early stress echo has a definite prognostic value in predicting multivessel disease and identifying viable myocardium which requires revascularisation procedures. The indications for echo in the acute phase and before discharge are summarized according to recent American recommendations. ]

Lege Artis Medicinae

[Clinical and immunological aspects of polymyositis and dermatomyositis]

DANKÓ Katalin, ZILAHI Zsolt, SZEGEDI Gyula

[Polymyositis and dermatomyositis are autoimmune diseases characterized by muscle weakness, tenderness, occasionally pain, and ultimately atrophy and fibrosis of the muscles. The extraskeletal manifestations, particularly the cardiopulmonary, oropharyngeal, gastrointestinal involvement, are described. Studies of autoantibodies and cellular immune function support a central role for disordered immunity in the pathogenesis. The myositis-specific autoantibodies, expecially those directed at certain enzymes important in protein synthesis are found in a clinically distinct subset of patients. ]

Lege Artis Medicinae

[Right ventricular infarction]

KISS Gabriella

[Right ventricular infarction (RVI) may occure as isolated or, more often, associated with left ventricular – inferior or occasionally anterior - infarction. The diagnosis of RVI is based first of all on the characteristic clinical symptoms, on the ECG pattern and on the results of 2D-echo-cardiography. The exact localisation of the infarction has vital significance in the therapy of the acute phase. The mortality can be substantially decreased with adequate therapeutic measures even in severe cases. The prospective prognosis of RVI is more favourable than that of left ventricular infarcti on. The author presents the most important diagnostic and therapeutic features related to RVI. ]

Lege Artis Medicinae

[Role of platelet function in the pathogenesis of alzheimer's disease]

HASITZ Mária, LIPCSEY Attila, RÁCZ Zoltán

[Dementias, especially those of Alzheimer type represent very serious types of disease in the elderly. Amounting evidence suggests that Alzheimer's disease is reflected in the platelets of the patients. Our results and the data of scientific literature have been summarized. In vitro parameters of platelet shape and aggregation were compared. Platelet shape, characterized by aggregometer oscillation amplitude, and the initial rate of 50 uM ADP-induced aggregation have been recommended for supporting the diagnosis of Alzheimer's disease or Alzheimer-type senile dementia. Our results and those of others revealed that the function of the Alzheimer platelet is influenced by two effects: the plasma medium and the genetic background resulting in the change of the platelets. The results suggest that both effects are involved in the vitro functions detected.]

Lege Artis Medicinae

[The role of ultrasound in the diagnosis of septic hip prosthesis loosening]

FÖLDES Károly, BÁLINT Péter, GAÁL Marianna, KISS Csaba, BÁLINT Géza

[The aim of the authors is the application of non-invasive ultrasound examination to the detection of complications after hip joint arthroplasty. Their recent work has been a trial to explore the kind of diagnostic assistance of ultrasound in case of suspected endoprosthetic infection. 39 patiens have been examined after hip joint arthroplasty. Out of this sample there was a suspected clinical infection in 20 cases. The rest 19 patients had no complaints and made the control group. Out of the patients with complaints effusion was detected around the neck of the prosthesis by means of US in 7 cases. Out of these in 10 cases reoperation in 6 cases US guided joint aspiration verified our US results. The authors made conclusion that as to patients having complaints of pain after hip joint arthroplasty very useful assistance in avoiding infection may be given by quided ultra sound aspiration.]

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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.

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[The Comprehensive Aphasia Test in Hungarian]

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[In this paper we present the Comprehensive Aphasia Test-Hungarian (CAT-H; Zakariás and Lukács, in preparation), an assessment tool newly adapted to Hungarian, currently under standardisation. The test is suitable for the assessment of an acquired language disorder, post-stroke aphasia. The aims of this paper are to present 1) the main characteristics of the test, its areas of application, and the process of the Hungarian adaptation and standardisation, 2) the first results from a sample of Hungarian people with aphasia and healthy controls. Ninety-nine people with aphasia, mostly with unilateral, left hemisphere stroke, and 19 neurologically intact control participants were administered the CAT-H. In addition, we developed a questionnaire assessing demographic and clinical information. The CAT-H consists of two parts, a Cognitive Screening Test and a Language Test. People with aphasia performed significantly worse than the control group in all language and almost all cognitive subtests of the CAT-H. Consistent with our expectations, the control group performed close to ceiling in all subtests, whereas people with aphasia exhibited great individual variability both in the language and the cognitive subtests. In addition, we found that age, time post-onset, and type of stroke were associated with cognitive and linguistic abilities measured by the CAT-H. Our results and our experiences clearly show that the CAT-H provides a comprehensive profile of a person’s impaired and intact language abilities and can be used to monitor language recovery as well as to screen for basic cognitive deficits in aphasia. We hope that the CAT-H will be a unique resource for rehabilitation professionals and aphasia researchers in aphasia assessment and diagnostics in Hungary. ]

Lege Artis Medicinae

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[The rapidly spreading SARS-CoV2 respiratory virus has evoked an epidemic with serious aftermath around the world. In addition to the health effects, the global economic damage is actually unpredictable. At the same time, the pandemic has launched a series of unprecedented collaborative scientific research, including the development of vaccines. This study summarizes up-to-date information on vaccines, immune memory, and some emerging clinical effects.]

Lege Artis Medicinae

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Lege Artis Medicinae

[Second game, 37th move and Fourth game 78th move]

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[What has Go to do with making clinical decisions? One of the greatest intellectual challenges of bedside medicine is making decisions under uncertainty. Besides the psychological traps of traditionally intuitive and heuristic medical decision making, lack of information, scarce resources and characteristics of doctor-patient relationship contribute equally to this uncertainty. Formal, mathematical model based analysis of decisions used widely in developing clinical guidelines and in health technology assessment provides a good tool in theoretical terms to avoid pitfalls of intuitive decision making. Nevertheless it can be hardly used in individual situations and most physicians dislike it as well. This method, however, has its own limitations, especially while tailoring individual decisions, under inclusion of potential lack of input data used for calculations, or its large imprecision, and the low capability of the current mathematical models to represent the full complexity and variability of processes in complex systems. Nevertheless, clinical decision support systems can be helpful in the individual decision making of physicians if they are well integrated in the health information systems, and do not break down the physicians’ autonomy of making decisions. Classical decision support systems are knowledge based and rely on system of rules and problem specific algorithms. They are utilized widely from health administration to image processing. The current information revolution created the so-called artificial intelligence by machine learning methods, i.e. machines can learn indeed. This new generation of artificial intelligence is not based on particular system of rules but on neuronal networks teaching themselves by huge databases and general learning algorithms. This type of artificial intelligence outperforms humans already in certain fields like chess, Go, or aerial combat. Its development is full of challenges and threats, while it presents a technological breakthrough, which cannot be stopped and will transform our world. Its development and application has already started also in the healthcare. Health professionals must participate in this development to steer it into the right direction. Lee Sedol, 18-times Go world champion retired three years after his historical defeat from AlphaGo artificial intelligence, be­cause “Even if I become the No. 1, there is an entity that cannot be defeated”. It is our great luck that we do not need to compete or defeat it, we must ensure instead that it would be safe and trustworthy, and in collaboration with humans this entity would make healthcare more effective and efficient. ]