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Query: UMLS:C0728731 (prematurity)
 7,134 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sequenital mechanical pulsing of the chest wall with three stimuli failed to induce arrhythmias in normal dogs. After coronary arterial occlusion, this technique evoked in 11 of 12 animals repetitive ventricular tachycardia in 2. These responses corresponded closely to those elicited by electrical testing. In four conscious animals after recovery from myocardial infarction, precordial pulsing induced repetitive ventricular arrhythmias. The type of arrhythmia produced depended on the degree of prematurity of the third pulse in the sequence. The use of precordial mechanical stimulation can perhaps be modified and adapted as a method of detecting persons at high risk for sudden cardiac death.
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PMID:Precordial mechanical stimulation for exposing electrical instability in the ischemic heart. 8 Jan 27

13 male patients suffering from arteriosclerotic heart disease and/or arterial hypertension were monitored continuously before and after vascular surgical procedures using an arrhythmia computer. Heart rate, paroxysmal supraventricular tachycardias, ventricular extrasystoles, ventricular tachycardias, ventricular fibrillation and prematurity index (QnQe/QTn) were recorded numerically. Ventricular arrhythmias were detected as follows preoperatively in 12 patients, after operation in all patients, paired ventricular extrasystoles or episodes of ventricular tachycardia were found in 5 cases before and in 7 after operation, ventricular fibrillation in one case. The incidence of ventricular dysrhythmias increased significantly (p less than 0.05) early after operation, as did the heart rate during the observed postoperative period (p less than 0.001). The prematurity index dropped below 1.0 during the two days following operation. This differed significantly from the preoperative value (p less than 0.05). The incidence of ventricular extrasystoles was related to postoperative myocardial infarction and heart failure (p less than 0.01), which occurred in 6 cases, with a lethal outcome in three. Only occasionally controlled by trained staff in a normal surgical ward the "Servomed Dysrhythmiemonitor" yielded reliable numerical results during the main part of the monitored period. In two cases it led to immediate detection and rapid institution of treatment of severe tachyar rhythmias.
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PMID:[Postoperative cardiac arrhythmias (author's transl)]. 8 Sep 61

A semiautomated ventricular premature beat (VPB) detector was developed which detects VPBs based upon a logical combination of prematurity, amplitude, and width. This system utilizes technicians to define sensitivity and criteria of VPB detection and to monitor the system's performance using a unique feedback system. Technician-assisted semiautomated scanning was found superior both to the system using preselected criteria and sensitivity of the detectors, and to traditional Holter scanning for the detection of single and repetitive VPBs. Ninety percent confidence limits of VPB frequency per hour have been established for this system.
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PMID:Semiautomated data reduction of ventricular ectopic activity: methodology and clinical application. 8 47

The efficacy of caproate of hydroxyprogesterone and acetate of chlormadinone in preventing premature labore was compared in a controlled trial. The survey was based on 211 pregnant women with a high risk of premature delivery discovered during clinical examination. There are no significant differences between the two groups in either length of gestation, delay between the beginning of treatment and delivery or other parameters related to prematurity. The absence of evidence suggesting any significant difference between the two treatments can have three possible causes (which are discussed): the methodology, the inefficacy of the two products or the equivalent efficacy of the two products.
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PMID:A comparative study of the efficiency of hydroxyprogesterone caproate and of chlormadinone acetate in the prevention of premature labor. 8 68

Among 1600 pregnancies, in which amniocentesis for prenatal diagnosis had been performed, were 73 cases with previous threatened abortion. In none of these abortion occurred after amniocentesis. 56 children have been born so far. There is evidence for a slight but not statistically significant increase in the number of multifactoral anomalies in this group. This study supports former findings of a higher prematurity incidence after vaginal bleeding in early pregnancy. If amniocentesis took place after imminent abortion, brownish discoloured amniotic fluid has been withdrawn in 53%. This phenomenon probably results from transfer of blood substances from hematomata between uterine wall and amniotic sac. Cultivation of amniotic fluid cells may be impaired by those degradation products, prolonging the cultivation period for an average of 2 days. Special methodological modifications to enhance the success of amniotic fluid cell cultivation in those heavily contaminated specimens are discussed. There seems to be no interference with AFP-estimation. Fetoscopy vision may be impaired.
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PMID:[Prenatal diagnosis after abortus imminens--further progress of pregnancy and peculiarity of amniotic cell cultivation (author's transl)]. 8 78

This review has focused on the fetal erythrocyte. Fetal erythropoiesis, the production of a red cell with a shortened life-span, and the unique characteristics of this cell with respect to membrane structure and function, energy metabolism, and hemoglobin synthesis have been described. The hematologic manifestations of a variety of red cell abnormalities of structure, metabolism, and hemoglobin synthesis have been presented, as well as a discussion of the anemia of prematurity and selected nutritional disturbances that may distort this normal physiologic adaptation. We hope this review has served to further the reader's appreciation of this complicated and fascinating cell. Much more needs to be learned about the fetal erythrocyte. It is to be hoped that a fuller understanding of the fetal erythrocyte will provide insights into fetal development in general.
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PMID:Erythrocytes of the human neonate. 9 79

A study was carried out on the patient population of two cerebral palsy facilities serving Northeast New York State to evaluate obstetric factors which might be associated with the development of cerebral palsy. A combination of available medical records and a maternal questionnaire was used for analysis. Of 605 contracted, 158 mothers (26%) provided valid and detailed data, and the study was confined to these 158 patients. A positive association was found with increased reproductive loss, prematurity, and vaginal breech delivery. The need to develop and adopt a comprehensive uniform record system for the pregnant patient and her child is underscored. The limitations of a single factor retrospective study are acknowledged.
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PMID:Obstetric factors in cerebral palsy. 9 91

Thirty cases of hydrops fetalis were reviewed in the obstetrics hospital No. 2 of the Social Security, and were treated in the isoimmunization clinic. Important data were obtained from the analysis, the most outstanding was the fact that both the mother with previous pregnancies and incompatible Rh blood transfusions, cause the hemolytic diseases to the unborn product, which usually presents at birth a severe and clear hydrops fetalis. Previous care to delivery was of great help, specially spectrometric and photometric studies of the ammniotic fluid with purpose of following the evolution, and to evaluate the right moment to perform the intrauterine fetal transfusions, which at a certain stage may allow the fetus to grow more without important deterioration of its functions, thus avoiding lung problem in premature fetuses. This is the main reason for high mortality. Although if it is not applied at the right moment the results will be negative and it is frequent that the pregnancy ends in fetal deaths. In general, the high mortality index occurred in the products that showed severe hydrops fetalis, in spite of the fact that pre and post natal care, imply fetal problem. This is due to the prematurity as well as the pathological process to which they are submitted. It is also necessary to insist that in promptness to apply treatment in the neonatal period, will depend the life of these infants. This treatment is the responsibility of a whole specialized group that has the knowledge of the problems, such as obstetricians, pediatricians, biochemists, nurses and social workers, etc.
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PMID:[Fetal hydrops (review of 30 cases)]. 9 45

Fifteen newborn infants developed roentgenographic evidence of rickets while on long-term intravenous hyperalimentation. In each instance, the initial diagnosis of rickets was suggested on the chest roentgenogram, where characteristic cupped and frayed upper humeral metaphyses were noted; subsequent knee and wrist roentgenograms substantiated these findings. Factors which may have predisposed to the development of rickets include inadequate doses of vitamin D, prematurity and a rapid change in body weight during hyperalimentation therapy.
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PMID:Rickets as a complication of intravenous hyperalimentation in infants. 10 70

In a material of 300 cases of Rh incompatibility the clinical course of the hemolytic disease of the newborn was analyzed together with the complications of this disease and perinatal mortality. It was found that the intensity of icterus and the number of necessary exchange transfusions depended mainly on the grade of anemia at the time of birth. Prematurity caused no worsening of neonatal icterus but increased the frequency of complications and mortality. The high mortality of children born with severe anemia points to the necessity of hemotherapy of the fetuses before labor.
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PMID:The course of hemolytic disease of the newborn in Rh incompatibility. 10 13


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