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Biomedical subjects

R Luca

Publications and source records attributed to R Luca.

At least 19 recordsLinked to original sources
PubMed1995

[Chest pain and electrocardiographic changes in the presence of stenosis of the left common coronary artery].

Twelve-lead electrocardiogram were studied in 40 consecutive patients with angiographic left main coronary artery disease. The ECG were analysed during chest pain. The most frequent pattern was a ST elevation (> 0.1 mV) in lead a VR alone or with ST depression (> 0.2 mV) in the anterior or lateral leads. In coronary artery disease patients, the 12-lead electrocardiogram at rest remains the best test to detect patients at higher risk for massive myocardial infarction or death.

Chest Pain↗
PubMedDate not supplied

Attempts to improve the early enzymatic diagnosis of coronary heart disease.

Based on the hypothesis that beta lipoproteins have the ability to trap certain enzymes, an attempt was made to release these enzymes from the eventual beta lipoprotein blockade, by subjecting the serum to different processings such as: freezing-thawing (3 times), ultrasonation or treatment with Triton X100 or sodium desoxycholate. After the first two procedures an increase of serum LDH and alkaline phosphatase activities was observed in about half the sera investigated (normal and pathologic). In few cases of coronary heart disease (two out of 60), LDH activity reached a clearly pathologic level.

Alkaline Phosphatase↗
PubMedDate not supplied

Is cardiac involvement in collagen diseases important? A clinical study in 917 patients.

Cardiac involvement in collagen diseases was studied in 917 patients representing all the cases of collagen diseases diagnosed in the "N. Gh. Lupu" Institute of Internal Medicine between 1985 and 1987. The prevalence of the various cardiac disorders was studied within every disease or group of diseases diagnosed according to clinical, ECG, radiologic and when necessary echocardiographic data. Collagen heart disease was diagnosed in 38.2% of the patients. In the case of systemic lupus erythematosus, of polyarteritis nodosa and of progressive systemic sclerosis this proportion exceeds 50%. The most frequent cardiac disorders were the rhythm and conduction disturbances, detected in 112 patients (12.2%). The cardiomyopathies and myocarditis, not infrequent (7.4%) represented an element of severity influencing the evolution and prognosis of disease. Myocardial ischemia secondary to coronary vasculitis syndromes has proved to be an important pathogenic mechanism of cardiac disorders. By their frequency and severity, the cardiac involvements in collagen diseases have proved important, becoming sometimes a central diagnostic, therapeutic and prognostic problem.

Adult↗
PubMedDate not supplied

[Possibilities for remineralization in the incipient decay of the enamel].

Admitting the fact that dental decay is the result of an imbalance between the process of demineralization and that of remineralization, one of the main problems of odontology remains the increase of mineralization in the dental enamel in the post-eruptive maturation stage, and the remineralization of the incipient dental decay lesions. The author reviews the main aspects related to remineralization of the incipient decay which occurs in the dental enamel, as well as the possibilities of stimulation of remineralization with the aid of various agents, or by the use of certain obturation materials, of which certain types of glass ionomeric cements are very promising.

Dental Caries↗
PubMedDate not supplied

[Frequency of tooth loss in children and young subjects].

The frequency of edentation was evaluated in groups of children and young subjects aged between 7 and 18 years. The values obtained for this indicator have focused the attention on the type of organization and the quality of the curative assistance. Models for the processing of clinical data, as well as a comparison of the existing situation in the growth period with that of the adults has led to the establishment of conclusions concerning practical measures for the organization of the specialized assistance to children and young subjects.

Adolescent↗
PubMedDate not supplied

[Laboratory studies for assessing physical properties of silver amalgamate].

A laboratory study is presented, that was carried out with a view to expand knowledge on mechanical characteristics of the romanian silver amalgamate. Values for specific deformation were established, and for resistance to rupture under compression stress, the elasticity module was calculated, and the characteristic curve was determined, under compression. The results provided conclusions on the behaviour of obturations employing silver amalgamate under the effects of mastication forces.

Bite Force↗
PubMedDate not supplied

Cardiac involvement in progressive systemic sclerosis and polymyositis: a comparative study in 116 patients.

A comparative study was carried out in 116 patients-51 with progressive systemic sclerosis (PSS) and 65 with polymyositis (PM) to detect the cardiac involvements secondary to these two collagen diseases. Different forms of cardiac involvement could be detected in 51% of the patients with PSS and in 18.5% of those with PM. The most frequent cardiac dysfunctions were disturbances of rhythm and conduction probably due to the coronary vascular changes in PSS and to processes of fibrosis and degenerescence of the specific myocardial fibers in PM. Myocardial lesions expressed by myocarditis and cardiomyopathies are not infrequent and have important prognostic implications. In the group of patients studied the valvular cardiopathies and clinically evident pericardites were rare. Cardiac involvement clearly proved more frequent in PSS - in which the pathogenic mechanism is mainly vascular - than in PM. This emphasizes the great importance of coronary circulation disturbances in the pathogenesis of collagen heart diseases.

Arrhythmias, Cardiac↗
PubMedDate not supplied

Pacemaker therapy in a group of 132 patients with sick sinus syndrome--indications and results.

Of the 132 patients with sick sinus syndrome (SSS) studied, 62 (47.8%) required pacemaker implantation thus showing the severity of the arrhythmic syndrome. The pacing requirement varied according to the SSS arrhythmic form with a maximum in the tachy-brady syndrome (53.5%) and in major sinus bradyarrhythmias--S--A block and sinus arrest (54.1%). The presence of syncopes (in 32.6% of the patients) represented the main indication for pacing. Very good results (100% efficiency) were obtained in the bradycardic forms. In the tachy-brady syndrome electrostimulation solved completely the bradycardic component and was able, alone, to suppress the tachyarrhythmic episodes in 18.4% of the patients. By associating pacing with antiarrhythmic drugs favourable results were obtained in an additional proportion of 65.8% of the patients. In the rest of 15.8% of the cases the results were partial.

Evaluation Studies as Topic↗