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Biomedical subjects

A Colombo

Publications and source records attributed to A Colombo.

At least 109 records · Page 6Linked to original sources
PubMed1986

A randomized controlled trial of intravenous streptokinase in evolving acute myocardial infarction.

To determine the efficacy of intravenous streptokinase in acute myocardial infarction, 52 patients were randomized to intravenous streptokinase or control groups. Time from onset of infarction to randomization was similar in the streptokinase group and control group, 4.9 +/- 2.1 hours vs 5.4 +/- 2.4 hours, respectively. The 28 streptokinase patients received an intravenous infusion of 700,000 units of streptokinase followed by full-dose anticoagulation. The 24 control patients received normal saline solution followed by full-dose anticoagulation. Of 28 streptokinase patients, 12 (43%) had noninvasive evidence of reperfusion by early peaking of serum creatine kinase (peak creatine kinase less than 16 hours after onset of infarction) vs 3 of 24 control patients (13%), p less than 0.02. Two streptokinase patients (7%) had reperfusion arrhythmias during streptokinase infusion. One streptokinase patient (4%) and two control patients (8%) died during hospitalization. At angiography (16 +/- 5 days after infarction) 22 of 26 streptokinase patients (85%) had a patent infarct-related coronary artery compared to 8 of 20 control patients (40%), p less than 0.01. Comparison of radionuclide left ventricular ejection fraction assessed acutely (28 +/- 10 hours after infarction) with left ventricular ejection fraction at hospital discharge (15 +/- 3 days after infarction) showed no significant improvement in either the streptokinase or control group, 0% and +1%, respectively. At follow-up 13 +/- 7 months after infarction, total mortality rate was similar in the streptokinase group and control group, 17.8% (5 of 28 streptokinase patients) and 20.8% (5 of 24 control patients), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

Parenteral nutrition of injured patients.

Injured patients treated with fructose 1,6-diphosphate (1 millimole of phosphate per kilogram per day) together with parenteral nutrition had a better nitrogen balance than patients treated with isocaloric nutrition and an inorganic source of phosphate. Excretion of 3-methylhystidine was similar while tyrosine and alanine output from the extremities was lower in the group of patients given fructose 1,6-diphosphate. The data indicates that the protein sparing action of fructose 1,6-diphosphate is exerted through an increased protein synthesis.

Abdominal Injuries↗
PubMed1986

Evaluation of tests for heparin control during long-term extracorporeal circulation.

Two coagulation tests, Recalcified Activated Clotting Time (RACT) and Hemochron, were compared with the activated partial thromboplastin time (APTT) in in vitro heparinization experiments and in patients heparinized for long term extracorporeal circulation (ECC) to determine their suitability as guidelines for heparin administration. All tests had good precision, with a small variability between methods. There was satisfactory correlation with the heparin level in vivo (r = 0.77 for RACT; r = 0.80 for Hemochron and r = 0.82 for APTT) too, while the in vitro r was always greater than or equal to 0.94. Nevertheless, APTT values for plasma heparin levels higher than 1.5 U/ml were markedly prolonged, with a large standard deviation, and often "unclottable". The good correlation between the three tests, makes it possible to substitute RACT and Hemochron for APTT, during long-term ECC.

Analysis of Variance↗
PubMed1985

Effect of coffee on exercise-induced angina pectoris due to coronary artery disease in habitual coffee drinkers.

The acute effects of coffee on exercise-induced angina were studied in 17 men with coronary artery disease using a double-blind treadmill protocol. Ingestion of either 1 or 2 cups of caffeinated coffee increased the exercise duration until onset of angina (8 and 12%, respectively, p less than 0.05), whereas decaffeinated coffee had no effect. The extent of ST-segment depression and the heart rate-blood pressure product at angina were similar after drinking caffeinated and decaffeinated coffee. Exercise duration until 0.1 mV of ST-segment depression, as well as the heart rate, blood pressure and double product at angina and at 0.1 mV of ST-segment depression were similar after drinking caffeinated or decaffeinated coffee. The mean serum caffeine levels (+/- standard deviation) after ingestion of 1 and 2 cups of caffeinated coffee were 1.97 +/- 1.0 and 3.89 +/- 1.6 micrograms/ml, respectively. The acute ingestion of 1 to 2 cups of caffeinated coffee had no deleterious effect on exercise-induced angina pectoris in patients with coronary artery disease.

Adult↗
PubMed1985

Ambulatory blood pressure monitoring does not interfere with the haemodynamic effects of sleep.

Automatic or semi-automatic blood pressure (BP) monitoring is a widely used method for assessing 24-h BP profile. However, the ability to achieve this goal depends on several factors that have not yet been controlled. The present study examined the possibility that cuff inflations disturb the sleep of patients and prevent the nocturnal fall in BP. This issue was investigated in 10 hospitalized subjects in whom BP was recorded intra-arterially for 48 h using the Oxford method. During the first or the second 24 h BP was also monitored non-invasively (Squibb ICR portable device), the cuff inflations being performed at 15 min intervals during the day and at 30 min intervals during the night. The computer analysis of the two different 24-h intra-arterial tracings showed that the addition of automatic BP monitoring had not caused any alteration in the day and night intra-arterial BP and heart rate profiles. Thus, disturbances of the haemodynamic effects of sleep do not characterize 24-h automatic BP recording, at least when made with the device employed in the present study. This removes an important objection against the ability of this approach to evaluate the patients' BP profiles properly.

Adult↗
PubMed1985

[Role of children with chronic hepatitis in the intrafamilial spread of hepatitis B virus infection].

In order to evaluate the intrafamilial spread of hepatitis B virus (HBV) infection we studied the serological markers of HBV in 101 relatives of 35 children with chronic hepatitis B. Sixty per cent of relatives had markers of infection and 25% showed persistent HBs antigenemia. The high prevalence of HBeAg versus anti-HBe in chronically infected relatives suggests a close temporal relationship of the infection between adults and children. These results support the hypothesis that the child is the main carrier of HBV infection in his family.

Adolescent↗
PubMed1984

Pleural plaques and risk of cancer in Turin, northwestern Italy. An autopsy study.

The relationship between the occurrence of neoplastic diseases and the presence of pleural plaques was studied in a series of 1097 autopsies performed in Turin from the adult general population. In men, pleural plaques showed an association with the presence of laryngeal, pulmonary, esophageal, and colorectal cancer. Only cancer of the larynx was strongly related to the occurrence of such pleural changes. This autopsy investigation confirms previous observations by others based on x-ray findings, and suggests that pleural plaques may be regarded as risk indicators of possibly asbestos-related tumors in the general population.

Aged↗
PubMed1984

CT and cerebral ischemic infarcts. Correlations between morphological and clinical-prognostic findings.

A total of 66 patients with supratentorial ischemic infarct underwent serial CT scans in order to study the relationship between CT images and clinical evolution of the infarct. Little information of prognostic value is given by CT in patients with slight neurological deficits, whereas it enables factors with a negative influence on the prognosis to be identified in patients with moderate to severe deficits.

Adult↗
PubMed1984

Activity of classical and alternative pathways of complement in preterm and small for gestational age infants.

Complement activity was compared in 50 low birth weight infants divided into appropriate and small for gestational age groups; the influence of birth weight and gestational age on complement development was also investigated. CH50 and kinetics (tH50) of both classical and alternative pathway activity of complement, C3, and Factor B levels were significantly higher in small for gestational age infants (classical pathway CH50, 630 HU/ml +/- 184 SD; CP tH50, 77 min +/- 47; aternative pathway CH50, 44.8 HU/ml +/- 11.3; AP tH50, 56 min +/- 43; C3, 73.98 mg/dl +/- 12.68; and Factor B, 13.17 mg/dl +/- 3.67) than in weight-matched appropriate for gestational age infants (CP CH50, 523 HU/ml +/- 152; CP tH50, 105 min +/- 49; AP CH50, 38.8 HU/ml +/- 13; AP tH50, 90 min +/- 53; C3, 58.14 mg/dl +/- 9.43; and Factor B, 9.32 mg/dl +/- 1.73). Complement values were lower in low birth weight infants than in adult controls (P less than 0.001 in all cases). All complement parameters were mainly correlated with gestational age; CH50 values of the classical and alternative pathways were also highly correlated with each other (r = 0.64; P less than 0.001). Low birth weight infants, especially preterm infants, have an important defect of complement activity. Complement factors increase gradually during gestation and intrauterine growth retardation does not affect complement development. Classical and alternative complement pathway activities have a similar development pattern.

Complement Activation↗
PubMed1984

Acid load after intravenous aminoacid infusion: comparison of clorurated vs. acetated solutions.

Ten patients who underwent elective abdominal surgery were given a daily load of one liter of a 10% aminoacid solution randomly containing cationic aminoacid as clorure or acetate salt during the first four post-operative days. None of the patients developed acidosis but the mean daily urinary excretion of titratable acidity and ammonium ions was significantly higher in clorure treated patients. An aminoacid solution containing aminoacid as acetate acts as a sparing solution for tubular buffer activity, and therefore should be preferred for patients with tubular impairment.

Abdomen↗