PubMed Health⌕ Search

Biomedical subjects

M Ia Ruda

Publications and source records attributed to M Ia Ruda.

At least 37 records · Page 2Linked to original sources
PubMed1993

[A trial of the use of a new thrombolytic preparation--recombinant tissue-type plasminogen activator--in myocardial infarct patients].

Search for more effective and safe drugs has recently led to the design of second-generation thrombolytic enzymes one of which is recombinant tissue plasminogen activator. A total of 80 patients including 41 who received tissue plasminogen activator (TPA) (Group 1), 39 on streptokinase (SK) (Group 2) were examined. By the 90th minute of thrombolytic infusion, coronary blood flow was recovered in 27 (66%) patients from Group 1 and 19 (49%) from Group 2 (p = 0.12). A decrease in fibrinogen concentration by less than 1 g/l was seen in 7 (18.4%) patients from Group 1 and in 29 (82.9%) patients from Group 2 (p = 0.00005). The levels of fibrinogen and plasminogen during 36 hours of initiation of thrombolytic infusion were statistically significantly lower in Group 2. The incidence of hemorrhages was the same in the two groups and equal to 26.8 and 28.0% in Groups 1 and 2, respectively. All the patients had no hemorrhages requiring transfusion of blood and its substitutes, as well as no cerebral circulatory disorders in the first week of the disease.

Adult↗
PubMed1993

[The effect of transient myocardial ischemia on the late potentials during transluminal coronary angioplasty in patients with ischemic heart disease].

The frequency of recording late potentials and their dynamics were studied in 25 patients with coronary heart disease before, during, and after transluminal angioplasty (TAP). Baseline late potentials were observed in 6 (20.7%) cases. During TAP, late potentials were recorded significantly more frequently (48.3%) than the baseline ones (p < 0.03), in 6 (20.7%) patients, late potentials appeared only in arterial dilatation and disappeared after TAP. There was a profound decrease in root-mean-square amplitude of late 40 msec in the QRS complex and an increase in the duration of low-amplitude (less than 40 microV) signals at the end of the QRS complex as compared to the baseline values. In ST-segment elevation, the parameters of the ECG signal-average become deteriorated to a greater degree than those in ST-segment depression.

Adult↗
PubMed1993

[The dynamics of the signal-averaged ECG in myocardial infarct patients].

To study the dynamics of signal-averaged ECG and late potentials (LP) in the first month of myocardial infarction (MI) and the impact of coronary reperfusion on them, examinations were made of 98 patients with primary myocardial infarction, in 69 of whom coronary reperfusion was achieved. LP was found to be detectable just in the first hours of MI, their stabilization (steady-state appearance or cessation) mainly occurred at day 3 of the onset. LP detection at this time allowed them to be predicted before the patients' discharge (70% sensitivity and 95% specificity, 82% predictive value in the first 24 hours of MI, LPs are characterized by more instability than those in the subsequent period of the patients' hospitalization. Thrombolytic therapy and coronary artery patency have no impact on the frequency of LP recording and parameters of signal-averaged ECG. No significant difference was found in the frequency of recording LP in anterior and inferior MI before discharge. The frequency of LP recording does not depend on the sex and age of a patient, the maximum creatine phosphokinase levels, and the presence of postinfarction angina pectoris and heart failure.

Chi-Square Distribution↗
PubMed1992

[Cardiolipin antibodies in patients with myocardial infarction and unstable angina pectoris].

The clinical value of IgG and IgM cardiolipin antibodies (CLa) was examined in 22 patients with myocardial infarction and 9 patients with unstable angina (UA). Higher IgG levels were observed in 41% of MI patients and 55% of UA patients. There was a significant correlation between the detection of IgG CLa in patients with a history of myocardial infarction and the presence of left ventricular intracavitary thrombosis. The levels of IgG CLa were increased in 78% of patients with history of MI and in 32% without MI history. In addition, those of IgG CLa was higher in 80% of IM patients with signs of intracavitary thrombosis and in 38% with cavitary thrombosis. The findings suggest that antibodies to cardiolipin (of IgG in particular) make contribution to the development of thrombotic events in patients with coronary atherosclerosis in the absence of autoimmune pathology.

Adult↗
PubMed1992

[Hemodynamic effects of intravenous allapinine in patients with myocardial infarction].

Single intravenous allapinine, 30 mg, given to patients with acute myocardial infarction, including those with moderate circulatory insufficiency, fails to affect central hemodynamic parameters or has a favourable action: normalizes pulmonary diastolic pressure, cardiac index, diminishes total peripheral vascular resistance. The agent also produces a weak antihypertensive effect and increases heart rate.

Aconitine↗
PubMed1992

[Clinical and prognostic value of myocardial scintigraphy using technetium Tc 99m pyrophosphate in patients with unstable stenocardia].

The clinical and predictive value of 99mTc pyrophosphate myocardial scintigraphy was studied in 164 patients with various clinical courses of unstable angina pectoris. Some patients with the unstable anginal syndrome proceeding with prolonged pain attacks were shown to have irreversible myocardial lesions detectable by 99mTc pyrophosphate myocardial scintigraphy. However, the study indicated that the presence of small myocardial necrotic foci in this case was of insignificant predictive value.

Adult↗
PubMed1991

[Pharmacodynamics of allapinine during long-term infusion in patients with chronic ischemic heart disease and frequent ventricular extrasystole].

During a prolonged (24-hour) intravenous administration in a dose of 126 mg, allapinine produced a stable pronounced antiarrhythmic effect in 90% of the patients with frequent premature ventricular contraction and adverse reactions in the central nervous system in 65% of the cases. However, the latter effect of allapinine is short-term and ceased independently without altering the infusion rate. More serious adverse effects (hypotensive reactions, proarhythmic effects) occurred in 4% of the cases.

Aconitine↗
PubMed1991

[The cholesterol content in immune complexes as a marker of coronary and peripheral atherosclerosis].

As many as 107 patients with coronary atherosclerosis, 66 with peripheral atherosclerosis, 27 with unaltered coronary arteries and 30 healthy blood donors were examined. The content of cholesterol in immune complexes was significantly higher in patients with coronary and peripheral atherosclerosis as compared to patients with intact arteries and healthy subjects. The highest content of cholesterol in immune complexes was detected in patients with combined lesions of coronary arteries and arteries of the lower limbs. It exceeded 3.5-5.5-fold the content of cholesterol in immune complexes in the control groups. The accuracy of the diagnosis with the aid of measuring the content of cholesterol in immune complexes in atherosclerosis of any sites was equal to 85%, in peripheral atherosclerosis to 89%, which slightly exceeded the diagnosis accuracy in atherosclerosis of coronary arteries (83%).

Adult↗
PubMed1991

[Effect of echinochrom on experimental myocardial reperfusion injury].

Echinochrom, a new antioxidant of the polyhydroxynaphthaquinone class, was tested for its cardioprotective activity in a model of occlusive reperfusion myocardial infarction (90-min occlusion and 4-hour reperfusion) in the acute experiments with open-chest dogs. The bolus intravenous injection of echinochrom in a dose of 1 mg/kg 5 min before reperfusion caused a significant (over 40%) reduction in the size of a necrotic focus. A supplementary administration of echinochrom 5 min after the onset of ischemia failed to contribute to a significant enhancement of its protective effect, suggesting that there is no substantial effect of the agent on ischemic lesion. The efficacy of echinochrom given after prolonged ischemia, low effective doses, and no adverse effects create prerequisites for using the drug in the clinical setting.

Animals↗
PubMed1991

[Prognostic significance of post-infarction "silent" ischemia].

To study the predictive value of silent ischemia, a total of 132 patients with first transmural myocardial infarction were examined, 69 had anterior and 63 had inferior myocardial infarction. On days 8-12 of onset of the disease, all the patients underwent loading two-dimensional echocardiography along with transesophageal pacing, as well as polyposition coronary angiography. According to the echocardiographic findings, 3 groups of patients were identified: 1) 34 (25.8%) with painful ischemia; 2) 37 (28.0%) with silent ischemia; 3) 61 (46.2%) with a negative test. Ischemic alterations were more frequently seen in inferior (73%) than in anterior (36.2%) myocardial infarction. The patients with painful ischemia showed a lower threshold of ischemia occurrence, more severe and prolonged ST segment depression, and greater extent of an asynergic area than did the patients with silent ischemia. A 1-5-year (mean 2.4) follow-up revealed that in terms of the risk for postinfarction angina, recurrent myocardial infarction and fatal outcomes, patients with silent ischemia represent an intermediate group between those with painful ischemia and those who have a negative load test.

Adult↗
PubMed1991

[Circulating immune complex cholesterol as a biochemical marker of coronary atherosclerosis].

The study was undertaken to examine 134 patients who were divided into 2 groups: 1) those with angiographically documented coronary atherosclerosis and 2) those with unaltered coronary arteries. The levels of immune complex cholesterol and the parameters of serum lipid spectrum were investigated in all the patients. The level of immune complex cholesterol and the apo B/apo AI ratio were the most informative indices in the characterization of coronary atherosclerosis. Immune complex cholesterol may be used as a marker of coronary atherosclerosis, the diagnostic accuracy is 78% with this method.

Adult↗
PubMed1991

[Adhesive activity of blood platelets in patients with stable or unstable angina pectoris and acute myocardial infarct].

Platelet adhesive activity was assayed in patients with stable angina (SA) or unstable angina (UA) and acute myocardial infarction (AMI). With scanning electron microscopy, platelet adhesions to Type IV collagen (C-IV) and plastic material, which had been stimulated by low-dose ADP, epinephrine and U-46 619, a stable thromboxane A2 analogue (agonist-induced adhesion) were determined. As compared with the control group, patients with SA or UA, showed significantly higher adhesion of platelets to the collagen substrate, whereas UA patients alone displayed a significantly increased agonist-induced adhesion when epinephrine was employed as an agonist. A sharp enhancement of platelet adhesion was characteristic of patients with AMI on days 1-3 of the onset. On days 4-5, the adhesive activity slightly dropped, and on day 7-10, it returned to the control level of healthy volunteers. The time course of adhesive activity decrease correlated with lower blood levels of creatine phosphokinase in patients with AMI. A high correlation was established between the alterations found in all the types of platelet adhesion during the course of AMI, which suggests there is an unspecific nature of increase and subsequent decrease platelet responses to all the inductors used. A comparison of patients taking and not taking aspirin (250 mg/day) revealed no differences both in the magnitude of an increase in platelet adhesion in the first 3 days and in that of its decrease on days 7-10 of AMI.

Adult↗
PubMed1991

[Effects of restored blood flow on the contractile function of the right ventricle in patients with acute myocardial infarct: data of two-dimensional computerized echocardiography].

The volumes of the right and left ventricles were measured in 78 patients with first acute transmural myocardial infarction at days 1, 3, 7, 14, and 28 of the disease. Thirty four patients were diagnosed as having anterior myocardial infarction, 35 presented with inferior myocardial infarction, and 9 had a concurrent right and left ventricular inferior wall myocardial infarction. A high incidence of right ventricular dysfunction was confirmed both in anterior and inferior myocardial infarction. The most profound right ventricular contractile dysfunctions were detected in patients with proximal right coronary occlusion in the absence of reperfusion. Successful thrombolytic therapy for myocardial infarction was found to affect right ventricular function to a lesser extent than left function.

Adult↗
PubMed1990

[Intravenous infusions of nitroglycerin in unstable stenocardia].

Clinical and prognostic significance of intravenous nitroglycerin infusions (INI) were studied in 127 patients with unstable angina pectoris. INI dose ranged from 25 to 800 micrograms/min (mean 198.2 +/- 21.8 micrograms/min), the duration varied from 2 h to 20 days (mean 5.2 days). Unfavorable effects occurred in 50 patients (39.3%): 18 patients developed myocardial infarction which was fatal in 10 cases, one died of circulatory insufficiency, transluminal angioplasty was performed in 6, aortocoronary shunting in 26. INI promoted stabilization of the disease in 77 patients (60.7%). They were discharged from the hospital to continue on maintenance therapy.

Adult↗
PubMed1990

[Effect of thrombolytic, anticoagulant and anti-thrombocytic therapy on the development of left-ventricular thrombosis and the incidence of thromboembolic complications in patients with myocardial infarction].

To reveal the effects produced by thrombolytic and anticoagulative therapies on the formation of left ventricular mural thrombosis (LVT) and the frequency of thromboembolic events, a prospective randomized study was performed in 285 patients with primary transmural myocardial infarction. LVT was diagnosed from the serial two-dimensional echocardiographic findings. No significant effect of the therapy with thrombolytic and anticoagulative agents was found on the incidence and periods of intracavitary LVT development. There was a significant reduction in the incidence of LVT during early (less than 3 hours) reperfusion of the occluded coronary artery. Anticoagulative and antiplatelet therapies performed within the first month of myocardial infarction decrease the risk for systemic thromboembolism in patients with diagnosed LVT.

Blood Coagulation↗