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Query: UMLS:C0033036 (APC)
 10,214 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To obtain information on the cardiac rhythm characteristics of subjects without heart disease during their daily work, we examined the continuous 24-hour electrocardiographic recordings of 400 workers from 4 factories in Eastern France presenting with criteria of cardiac normality. Sex, age and socio-professional category were taken into account. Supraventricular extrasystoles were extremely common, being observed in 52 p. 100 of men and 39 p. 100 of women. In men, the frequency of these extrasystoles increased with age (p less than 0.001), and their number was less than 20 per 24 hours in 90 p. 100 of the cases. Ventricular extrasystoles were detected in 40 p. 100 of men and 32 p. 100 of women. They too were age-related, though not significantly. Their number was less than 10 per 24 hours in 68 p. 100 of the cases and 10 to 50 per 24 hours in 28 p. 100. These ventricular extrasystoles usually were monomorphous, regularly coupled (92 p. 100) and isolated. However, 2 attacks of tachycardia were discovered. Episodes of bradyarrhythmia (RR superior or equal to 1500 ms) were present in 25 p. 100 of men and 19 p. 100 of women. They occurred more frequently before the age of 35 than later (p less than 0.001) and the recordings confirmed that they were predominantly nocturnal. Recordings without "disorders of rhythm" were relatively rare (20 p. 100 of men, 28.5 p. 100 of women). Finally, there was no clear-cut correlation between the prevalence or characteristics of these various "rhythmic abnormalities" and the type of professional activity.
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PMID:[Cardiac arrhythmia observed in 400 workers without obvious heart disease by Holter monitoring]. 314 28

Cardiac arrhythmias are one of the most frequent indications for a 2D and Doppler fetal echocardiographic assessment (DE). If accompanied by a non-immune fetal hydrops, arrhythmias (A) involve an increased risk of intrauterine death. Some A and mainly the bradyarrhythmias (BA) can be the first sign of major cardiac malformation (CM). In a series of 404 pregnancies between week 17 and 40 of gestation (mean 27.6 weeks), a Doppler echocardiography was carried out; in 137 (35%) fetuses (F) this examination was based on the indication of arrhythmia. 33 (24.2%) of these fetuses showed a cardiac malformation. Bradyarrhythmias were found in 20 F; 5 had a complete AV-block including, 4 with an important cardiac abnormality (TU, complete AV-canal, corr. TGV). SVT's and auricular flutters (AF) made transplacental treatment necessary in 4 fetuses (1 AF, 3 SVT); they had no major cardiac malformation. PAC's were present in 59 pregnancies of which several had minor or major anomalies. Doppler echocardiography served to define the arrhythmia and the structural cardiac malformation, but also to follow transplacental treatment. These investigations have allowed us to schedule delivery under neonatal surveillance. After birth, 5 neonates had to be treated for persistent dysrhythmia (5 SVT, 2 complete AB-blocks), and 10 for a major cardiac malformation.
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PMID:[Prenatal diagnosis of arrhythmias and associated congenital cardiac abnormalities using ultrasonography]. 847 61