ContinuousWaveDoppler:LeftParasternalTransducerPosition
CWBeamintheRightVentricularOutflowTractandPulmonaryArtery
CWBeam:IntheRightVentricularOutflowTractandPulmonaryArteryNormalFlow:SystolicAbnormalFindings:Increasedsystolicflowvelocityandspectralbroadeningduetoasubpulmonicstenosisortoaventricularseptaldefect.Highvelocityretrogradediastolicflowandspectralbroadeningduetop...[阅读全文]
ContinuousWaveDoppler:ApicalTransducerPosition
CWBeam:IntheLeftVentricularInflowTractandLeftAtriumNormalFlow:PrimarilydiastolicAbnormalFindings:Increasedsystolicflowvelocityandspectralbroadeningduetomitralstenosis.Highvelocityretrogradesystolicflowandspectralbroadeningduetomitralregurgitation.
CWBeam:IntheLeftVentricularOutflowTractandAscending...[阅读全文]
ContinuousWaveDoppler
ContinuouswaveDopplerisdifferentiatedfrompulsedwaveDopplerbythefactthatinformationaboutflowoccurringalongtheentirecontinuouswavebeamisprocessedanddisplayed.Flowoccurringinoneormoreflowareasintheheartmayberecordedsimultaneouslywithoutanydepthspecificinformation.Thefollowingtransducerpositionsmaybeusedtorecordflowinformationusingcontinuouswavetechniques:
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OtherSamplingSites:ParasternalShortAxisViews
AorticValveLevelAsystolicflowdisturbanceduetomitralregurgitationmaybedetectedintheleftatrium.ShuntflowacrossasubmembranousVSDmaybeparalleltotheultrasoundbeamwhenthesamplevolumeispositionedontherightsideoftheinterventricularseptuminashortaxisplanejustbelowtheaorticvalve.
MitralValveLevelAdiastolicflowdisturbanceduetomitralstenosismaybedetectedbey...[
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OtherSamplingSites
ParasternalLongAxisViewThisviewmaybeparticularlyusefulforrecordingaventricularseptaldefect(VSD)becausetheultrasoundbeammaybeparalleltotheshuntflowfromthisapproach.Evidenceofotherflowdisturbancesthatmayberecordedfromaperpendicularapproachinthisparasternallongaxisviewincludes:LeftArrium(LA):SystolicspectralbroadeningduetomitralregurgitationLeftVentricularInflowTract(LVIT)Diast...[
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PulsedWaveDoppler:ParasternalShortAxisViewPulmonaryArtery
SampleVolume:IntheRightVentricularInflowTract(RVIT)NormalFlow:PrimarilydiastolicAbnormalFinding:Increaseddiastolicflowvelocityandspectralbroadeningduetotricuspidstenosis.
SampleVolume:IntheRightAtrium(RA)NormalFlow:DiastolicAbnormalFinding:Highvelocityretrogradesystolicflowandspectralbroadeningduetotricuspidregurgitation.
Sample...[
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CardiacDoppler:NormalSpectralDopplerPatterns:StudyContent
PulsedWaveDoppler:SuprasternalNotchView
SampleVolume:Intheascendingaorta(ascAo)NormalFlow:SystolicAbnormalFindings:Increasedsystolicflowvelocityandspectralbroadeningduetoaorticorsubaorticstenosis.Retrogradediastolicflowduetosevereaorticinsufficiency.
SampleVolume:InthedescendingaortaNormalFlow:SystolicAbnormalFinding:Inc...[阅读全文]
营养丰富，但含草酸，影响钙吸收
国家蔬菜系统工程研究中心 唐晓伟
近来，随着春笋上市，医院里因为“尝鲜”而引发过敏性皮炎、呼吸道及消化道疾病的病人也随之增多。春季本来就容易过敏，尤其是对于患有摄入性过敏症的人来说，吃鲜笋更要小心。
春笋一向被誉为“春天的菜王”，是因为它肉质鲜嫩、营养丰富，纤维素和氨基酸的含量尤其高[
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受农药和汽车尾气污染，铅汞含量高
国家蔬菜系统工程研究中心 饶璐璐
很多人喜欢在马路边的草地上或公园里挖野菜，一来是图方便，二来认为它是天然的绿色食品，吃着放心。其实，并非所有在自然环境中生长的野菜都是无污染的。
在工业废水流经的草地、马路两旁生长的野菜，因遭受废水、汽车尾气等的污染，导致其中汞、铅等重金属含量及其[
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婆婆丁炒肉丝
原料：婆婆丁250克，猪肉100克，姜末、碘盐、鸡精、酱油、白糖、料酒、花生油、淀粉适量
做法：1.将猪肉洗净切丝后用适量碘盐、酱油、鸡精、白糖、淀粉拌匀，腌渍一会待用。婆婆丁清洗干净后用沸水约焯半分钟捞出，用清水洗一遍，沥去水，切段。2.热锅放油，投入肉丝和姜末并快速翻炒至肉丝散开，放入婆婆丁，再撒上适量盐，炒均匀即可[
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