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Objective
To observe the changes of F waves on electrocardiograms (ECGs) in patients with persistent atrial fibrillation during the insertion of a peripherally inserted central catheter (PICC), and to analyze the application effect of the ECG method (through F wave changes) for guiding PICC tip positioning.
Methods
Seventy‐two patients who met the inclusion criteria and needed a PICC catheter were...
Based on satellite derived NO2 column data from OMI, we analysed the characteristics of spatio-temporal distribution of tropospheric NO2 column density and its impact factors over Beijing-Tianjin-Hebei Region for 2005–2014.
Reaction of the iodo-bridged tungsten dimer [(PhN)W(CO) 2 I 2 ] 2 with 2 equiv of LiOCH 3 produced new dimers of the type [(PhN)W(CO) 2 I(OCH 3 )] 2 . The intermediate iodo-bridged dimer [(PhN)W(CO) 2 (μ-I)(OCH 3 )] 2 (5) reacted with PMe 3 , P(OMe) 3 or NH 2 C 6 H 2 Me 3 ...
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