Sinoatrial Node Electrogram Studies in Patients with Sick Sinus Syndrome

Sinoatrial node electrogram (SNE) was recorded successfully in recent years, using transvenous electrode catheter. Via SNE and intratrialelectrogram (IEG), one could measure sinoatrial conduction time(SACT) directly, observe sinoatrial node (SN) potential changes in cadiac cycles, diagnose some sinus arrhythmias which couldn't be confirmed by surface ECG. All these could offer accurate evidence for differential diagnosis of sick sinus syndrome (SSS). The authors recommend a modified method for the location of the electrode catheter, by which one can increase success rate of obtaining stable SNE. Using this method, the authors recorded SNE in 10 cases with SSS successfully.     

RESEARCH ON A REAL-TIME CONTROL SYSTEM OF LOW POWER DISSIPATION FOR CONTINUOUS CYCLIC PERITONEAL DIALYSIS(CCPD) CYCLER

FOREWORDPeritonealdialysisrepresentssoluteandfluidexchangemainlybetweenperitonealcapillarybloodanddialysissolutionintheperitonealcavity'CombinedwithhemodialySisandrenaltransplantation,peritonealdialysisisusedmainlyforthetreatmentofrenalfailure,particularlyforchronicfailure'In1976,Prof'Popovichdevelopedcontinuousambulatoryperitonealdialysis(CAPD)basingontheconceptofcontinuousequilibrationdialysis('1'Fromthenon,peritonealdialysisfounditsclinicaluse'Continuouscyclicperitonealdialysis(CCPD…     

日本YMS公司推出Sierra磁共振成象装置

日本东京Yokogawa医用仪器公司已宣称与美国通用电气公司,联合开发成功1.5Tesla超导,双床磁共振成象装置Sierra。 Sierra的设计是减少空间,提供的优点是1.5Tesla机器仅需要中磁场强度型号机器相同的空间要求,结构较紧凑以致于可选用GE公司的活动磁场屏蔽进行屏蔽。 Sierra装备有快速扫描装置,它比传统型号快16倍的速度进行旋转诊断,而不损失图     

CO_2激光散焦治疗耳廓假性囊肿

我院自1989年6月至1991年6月应用CO_2激光散焦治疗耳廓假性囊肿34例,现报告如下: 本病原因尚不清楚,一般认为与外伤有关,多偶然发现耳廓部有一肿物,局部肿胀,疼痛感而来院就诊。     

AN ARTERIAL PERFORMANCE INDEX

INTRODUCTIONWhenpulsatingbloodflowsthroughtheartery,thearterialwallwilldilateandcontractperiodicallybecauseoftheelasticityofarterialwallandtheperipheralresistance'Thisensuresthecontinuityofbloodflowandthelocalbloodpressurenotchangingtoomuch.Ifthearterialwallispathologicallychanged,causingthechangeoftheelasticityofarterialwall,theperformanceofarterywillbeaffected'Atpresent,thecomplianceiswidelyusedtoevaluatethedistensibilityofarterialwass[1],butitcannotevaluatethetotalperformanceofartery'T…     

大白鼠中缝背核的纤维联系

应用Nauta法和HRP逆行传递法研究了大鼠中缝背核的传出和传入联系。传出纤维可分为上行和下行两部分。上行纤维分为三组.1.背侧组:经中央管周围灰持上行,沿途止于中央灰质和第Ⅲ脑室室旁灰质。2.中间组:行于被盖部中缝和两侧网状结构内并终止于网状结构核团。3.腹侧组:行于被盖腹侧区和内侧前脑束以及暖昧带。分别终止于中脑网状结构、脚间核、黑质和被盖腹侧区。经内侧前脑束上行可达丘脑腹侧核、丘脑后核、束旁核、脚内核、下丘脑外侧核,隔内侧核和视前外侧核等。下行传出纤维经中缝两侧下行,沿途终止于中缝桥核、脑桥被盖网状结构,中缝大核、延髓巨细胞核、旁正中网状核,中缝隐核、中缝苍白核和橄榄内侧副核,三叉神经感觉核和三叉神经脊束核。下行纤维可继续下降行于脊髓背外侧索、腹侧索前正中裂两侧,终止于前角,侧角,后角Rexed Ⅰ～Ⅴ层,以及中央管周围灰质。中缝背核的传入投射来自:1.第Ⅲ脑室室周灰质和室旁灰质、中脑导水管周围灰质、第Ⅳ脑室室周灰质。2.视前内侧核。3.下丘脑前核、下丘脑外侧核、下丘脑背侧核、视上核。4.黑质(包括密带和网带)以内侧份为主。5.蓝斑复合体。6.中脑网状结构。7.中缝中央上核、线形核、桥核和中缝大核。8.延髓网状结构外侧核的背内侧份。     

THE EFFECT OF ANISODAMINE ON THE MICROVASCULAR PERMEABILITY OF THE LUNGS DURING ARDS

INTRODUCTIONAdultRespiratoryDistressSyndrome(ARDS)isanacuteprogressiverespiratoryfailurecausedbymanyreasons.Thetherapeuticactionofthissyndromeisuncertain,becausethemechanismisnotwellknown.Thatis,theprognosisiscritical,themortailityisquiteheigh(50%f)ti--63'Butintherecenttenyears,manyscholarsinourcountryhavehadmuchexperienceintheaspectofusinganisodaminetorescueARDSpatientsandhavedecreasedthemortality(')'Howeveverthescholarsexplaintheprincipleofitindifferentways'Thechangesofmicrovascula…     

Abacavir once or twice daily combined with once-daily lamivudine and efavirenz for the treatment of antiretroviral-naive HIV-infected adults: results of the Ziagen Once Daily in Antiretroviral Combination Study

The long intracellular half-life of abacavir (ABC) supports its once-daily use, and this would be expected to simplify treatment if ABC could be given as part of a complete once-daily regimen. A randomized double-blind clinical trial compared the efficacy and safety of 600 mg of ABC administered once daily (n = 384) versus 300 mg of ABC administered twice daily (n = 386) in combination with 300 mg of lamivudine (3TC) and 600 mg of efavirenz (EFV) administered once daily in antiretroviral-naive patients over 48 weeks. The baseline median plasma HIV-1 RNA level was 4.89 log10 copies/mL (44% with viral load >100,000 copies/mL), and the median CD4 cell count was 262 cells/mm. ABC administered once daily was non-inferior to the twice-daily regimen, with 66% and 68% of patients in these respective treatment arms achieving a confirmed plasma HIV-1 RNA level <50 copies/mL (95% confidence interval: -8.4%, 4.9%). The ABC once-daily and twice-daily regimens were similar with respect to infrequency of virologic failure (10% vs. 8%), emergence of resistance mutations, CD4 cell increases from baseline (median, 188 vs. 200 cells/mm), safety profile, and incidence of ABC-related hypersensitivity reactions (9% vs. 7%). ABC administered once daily in combination with 3TC and EFV administered once daily was non-inferior to the ABC twice-daily dosing schedule when combined with 3TC and EFV over 48 weeks.