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A premature ventricular contraction (PVC) is a common event where the heartbeat is initiated by Purkinje fibers in the ventricles rather than by the sinoatrial node. PVCs may cause no symptoms or may be perceived as a "skipped beat" or felt as palpitations in the chest. PVCs do not usually pose any danger. [1]
In children, heart rate is preferably taken apically. To count the rate, place stethoscope on the anterior chest at the fifth intercostal space in a midclavicular position. [18] Each "lub-dub" sound is one beat. [19] [20] It should be taken for one full minute, and it should be determined if the rhythm is regular or irregular.
Since it is a gas under most ambient conditions, primary exposure is via inhalation, as opposed to the consumption of contaminated food or water, with occupational hazards being highest. Prior to 1974, workers were commonly exposed to 1,000 ppm vinyl chloride, causing "vinyl chloride illness" such as acroosteolysis and Raynaud's Phenomenon .
Ludwig Roemheld characterized this particular syndrome shortly before his death; one of his research topics around this time was the effects of calorie intake on the heart. In Elsevier publications, there is no current research or publishing under the name Roemheld syndrome, and as a result, many cases go undiagnosed. German publishing on the ...
Since 2023, seven babies in the neonatal intensive care unit of a Richmond hospital have suffered unexplained fractures and other injuries. Police last week arrested former nurse Erin Elizabeth ...
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From November 1995 to November 1996 in France, a national survey of pediatric departments for children under 15 years of age with unexplained encephalopathy and a threefold (or greater) increase in serum aminotransferase and/or ammonia led to the identification of nine definite cases of Reye syndrome (0.79 cases per million children). Eight of ...
Katelyn, who lives outside Houston, sneezes 12,000 times a day -- and sometimes, the seventh grader can't complete a sentence. Girl sneezes 12,000 times daily and can't stop: 'Kids make fun of me ...