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131.
R. Evertz K.R. Ramachandran J.P.R. Herrman L.R. van der Wieken 《Netherlands heart journal》2005,13(12):461-463
Hypothermia can cause several ECG changes which can be mistaken for other cardiac diseases, most importantly acute transmural ischaemia. These ECG changes correlate strongly with the degree of hypothermia and the prognosis of the patient. This brief report presents a 32-year-old male who was seen after a drowning accident. After resuscitation a 12-lead electrocardiogram showed changes typical for hypothermia: atrial fibrillation and Osborn waves. The ECG of the patient normalised after rewarming. 相似文献
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The evolution of prokaryotic ferredoxins--with a general method correcting for unobserved substitutions in less branched lineages 总被引:7,自引:0,他引:7
Thirty-one bacterial type ferredoxins were examined by means of the
parsimony method for their phylogenetic implications. The results show
reasonable relationships in that photosynthetic, thermophilic, and
desulfovibrio groups are identifiable; but a number of interesting
anomalies occur. These include a methanogen sequence that clusters among
the desulfovibrios. There are several differences from the phylogeny of
Woese. At least two duplications producing paralogous genes are
demonstrated, plus the probable existence of two more. The partial internal
gene duplication that doubled the length of ferredoxin is confirmed by
showing that the probability of the two ancestrally reconstructed halves
possessing that much similarity by chance is 10(- 7). Howard and co-workers
proposed that the two halves of the Azotobacter vinelandii are reversed
relative to most other sequences. A phylogeny, drawn with the halves of the
azotobacter sequence (and its relatives) reversed produced a tree that had
only three less nucleotide substitutions than did the tree without their
halves reversed. This plus other evidence suggests that the significantly
greater similarity observed across rather than within the halves is more
likely the result of convergence.
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