Abstract：
PURPOSE:We investigated the factors determining postexercise pressure and the relationship of venous valve closure and venous column segmentation to ambulatory venous pressure changes. METHODS:Valve closure and venous segmentation were observed during dynamic ascending phlebography in 40 nonrefluxive limbs and by duplex imaging in 25 normal limbs in healthy volunteers. Simultaneous volume (air plethysmography) and pressure studies during calf exercise were also carried out. Some studies used a simple mechanical model comprised of a collapsible latex tube ("calf pump") and a graduated "popliteal" valve. RESULTS:The femoropopliteal venous column above the popliteal valve remains unsegmented and continuous during ambulatory venous pressure changes in response to calf muscle contraction. Therefore ambulatory venous pressure changes cannot be explained purely on the basis of hydrostatic column pressure changes. Postexercise pressure appears to be determined by a complex set of factors: (1) physical segmentation of the venous column below the popliteal valve (i.e., tibial valve closure); (2) tube collapse below the closed valve, which further aids in the breakup of the hydrostatic column pressure and dampens the effect of any reflux through or around the closed valve; (3) ejection fraction, which influences the degree of tube collapse; and (4) the interaction of the resultant pressure forces with the wall properties of the venous pump. CONCLUSIONS:The mechanism of ambulatory venous pressure reduction is complex and multifactorial. The importance of venous wall characteristics as a determinant of postexercise pressure has not been previously appreciated. Changes in venous wall property after a thrombotic process, for example, could conceivably influence ambulatory venous pressure and recovery time in the absence of reflux.
journal_name
J Vasc Surgjournal_title
Journal of vascular surgeryauthors
Raju S,Fredericks R,Lishman P,Neglén P,Morano Jsubject
Has Abstractpub_date
1993-03-01 00:00:00pages
459-69issue
3eissn
0741-5214issn
1097-6809pii
0741-5214(93)90145-Cjournal_volume
17pub_type
杂志文章abstract：:Treatment of mycotic aortic aneurysm by excision and extraanatomic bypass is difficult to apply when the infectious process involves the visceral arteries. On the basis of experimental studies in our laboratory that demonstrated prolonged antistaphylococcal activity of rifampin-bonded, gelatin-impregnated Dacron graft...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/s0741-5214(96)70204-5
更新日期：1996-09-01 00:00:00
abstract：OBJECTIVE:The majority of endovascular aneurysm repair procedures are performed through the common femoral artery (CFA). Arterial access is gained by surgical cutdown or percutaneous approach. The surgical approach has a relatively high local complication rate. We describe superficial femoral artery (SFA) access as an ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2019.07.081
更新日期：2020-05-01 00:00:00
abstract：BACKGROUND:It has been suggested that hyperhomocysteinemia (HHcy) is an independent risk factor for peripheral arterial occlusive disease (PAOD). However, the relationship between dietary folate and vitamin B6, cofactors in the metabolism of homocysteine (Hcy), and PAOD is unclear. AIMS:To study the relationship betwe...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2003.09.046
更新日期：2004-03-01 00:00:00
abstract：OBJECTIVE AND METHOD:In this retrospective review, we report the surgical results of infected aortic aneurysms treated at a single center over 5 years. RESULTS:From October 1996 to October 2001, 19 patients with infected aortic aneurysm were treated with surgery, nine with suprarenal infections (four proximal descendi...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.2002.126557
更新日期：2002-10-01 00:00:00
abstract：OBJECTIVE:It has been previously shown that the SCD Response Compression System, by sensing the postcompression refill time of the lower limbs, delivers more compression cycles over time, resulting in as much as a 76% increase in the total volume of blood expelled per hour. Extended indications for pneumatic compressio...
journal_title：Journal of vascular surgery
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/j.jvs.2005.03.031
更新日期：2005-08-01 00:00:00
abstract：OBJECTIVE:Previous studies demonstrating a correlation between low shear stress (tau = 5-15 dyne/cm(2)) and experimental vein graft neointimal thickening (NIT) support the role of low tau in vein graft failure. However, a simple linear relationship between low tau and NIT would underestimate the degree of NIT evident i...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.2001.114819
更新日期：2001-07-01 00:00:00
abstract：OBJECTIVE:Failure of prior endovascular (EV) interventions for chronic limb ischemia has been reported to negatively affect patency and limb salvage after subsequent revascularization procedures. The goal of our study was to compare the clinical presentation of patients who failed infrainguinal EV and open revasculariz...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2012.12.076
更新日期：2013-07-01 00:00:00
abstract：BACKGROUND:Dual antiplatelet therapy (DAPT) usually refers to the administration of aspirin plus a platelet P2Y12 receptor blocker. This combination is commonly prescribed after revascularization procedures in patients with peripheral arterial disease (PAD) to prevent failure of the intervention. However, there is not ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章,评审
doi：10.1016/j.jvs.2018.02.047
更新日期：2018-06-01 00:00:00
abstract：INTRODUCTION:Fenestrated endovascular aneurysm repair (FEVAR) is the highest radiation dose procedure performed by vascular surgeons. We sought to characterize the radiation dose to patients and staff during FEVAR procedures with different premanufactured devices. METHODS:A single-center prospective study of FEVARs wa...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2018.02.031
更新日期：2018-11-01 00:00:00
abstract：:The burgeoning field of vascular tissue engineering holds promise for the creation of a practical and successful small-diameter arterial bypass graft. Many creative combinations of autologous cells and scaffolds exist along with an equally long list of microenvironmental cues used to create a functional arterial condu...
journal_title：Journal of vascular surgery
pub_type： 杂志文章,评审
doi：10.1016/j.jvs.2007.02.046
更新日期：2007-06-01 00:00:00
abstract：BACKGROUND:Patients undergoing endovascular aneurysm repair (EVAR) for abdominal aortic aneurysms can exhibit variations in sac behavior ranging from complete regression to expansion. We evaluated the impact of sac behavior at 1-year follow-up on late survival. METHODS:We used the Vascular Study Group of New England (...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2017.06.075
更新日期：2018-01-01 00:00:00
abstract：OBJECTIVE:This study proposes to establish a simulation-based technique for evaluating shear accumulation in stent grafts and to use the technique to assess the performance of a novel branched stent graft system. METHODS:Computational fluid dynamics models, with transient boundary conditions, particle injection, and r...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2016.07.108
更新日期：2017-06-01 00:00:00
abstract：OBJECTIVE:Several trials have reported early superior patency of stenting over isolated angioplasty (plain old balloon angioplasty [POBA]) for infra-inguinal occlusive disease, yet long-term data are sparse. The purpose of this study was to contrast long-term clinical outcomes and costs of angioplasty alone vs angiopla...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2011.03.283
更新日期：2011-10-01 00:00:00
abstract：PURPOSE:Elevations of plasmin have been implicated in the pathogenesis of abdominal aortic aneurysms (AAA) because of its ability to digest extracellular matrix proteins. Plasminogen activators regulate the conversion of plasminogen to plasmin. Tissue-type plasminogen activator (tPA) is more important in modulation of ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/s0741-5214(97)70333-1
更新日期：1997-01-01 00:00:00
abstract：PURPOSE:To evaluate complicated aortoiliac and lower extremity arterial bypass grafts with contrast-enhanced subtraction magnetic resonance angiography (MRA). METHODS:Twenty-three patients with 40 vascular grafts with either clinical symptoms or abnormal duplex findings were selected. They were examined using a fast T...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/s0741-5214(97)70017-x
更新日期：1997-12-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the effect of patient compliance on a program of watchful waiting in cases of small abdominal aortic aneurysms and to document the proportion of patients who become prohibitive operative risks during follow-up. STUDY DESIGN:A retrospective review was conducted at a ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.2000.108635
更新日期：2000-09-01 00:00:00
abstract：:Infected lower extremity bypass grafts have been associated with high rates of limb loss. Traditionally treatment has included graft excision. To compare aggressive local treatment, without graft removal, with more conventional graft excision, we reviewed 38 consecutive patients with 39 infected lower extremity bypass...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.1992.33846
更新日期：1992-02-01 00:00:00
abstract：PURPOSE:Post-carotid endarterectomy, thrombosis, and intimal hyperplasia may be decreased by the inhibition of platelet adhesion and activation. In this study, a novel agent, saratin, was used to inhibit platelet-to-collagen adhesion in a rat carotid endarterectomy model. Saratin is a recombinant protein isolated from ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.2001.116801
更新日期：2001-10-01 00:00:00
abstract：OBJECTIVE:Volume-outcome relationships for open abdominal aortic aneurysm (AAA) repair have received less attention in publicly funded health systems. Furthermore, the roles of surgeon seniority (years of experience) and composite volume (encompassing all major arterial cases) on outcomes after open AAA repair are less...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2017.10.050
更新日期：2018-06-01 00:00:00
abstract：OBJECTIVE:Thoracic endograft placement has become an acceptable treatment alternative to open repair of the thoracic aorta. Cerebral embolization when manipulating the aortic arch during cardiac catheterization is well described, but the influence of thoracic endovascular aortic repair (TEVAR) on this event remains poo...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2010.12.063
更新日期：2011-08-01 00:00:00
abstract：OBJECTIVE:A suitable ipsilateral great saphenous vein (GSV) autograft is widely considered the best material for arterial reconstruction of a popliteal artery aneurysm (PAA). There are, however, cases in which such a GSV is absent, diseased, or of too small diameter for this use. Alternatives to GSV are synthetic condu...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2017.12.049
更新日期：2018-08-01 00:00:00
abstract：PURPOSE:The feasibility and safety of combining carotid surgery and thrombolysis for occlusions of the internal carotid artery (ICA) and the middle cerebral artery (MCA), either as a simultaneous or as a staged procedure in acute ischemic strokes, was studied. METHODS:A nonrandomized clinical pilot study, which includ...
journal_title：Journal of vascular surgery
pub_type： 临床试验,杂志文章
doi：10.1016/s0741-5214(99)70274-0
更新日期：1999-03-01 00:00:00
abstract：OBJECTIVE:Diabetes and peripheral arterial disease (PAD) are independently associated with increased risk of amputation. However, the effect of poor glycemic control on adverse limb events has not been studied. We examined the effects of poor glycemic control (high hemoglobin A1c level) on the risk of amputation and mo...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2017.06.101
更新日期：2018-01-01 00:00:00
abstract：:A 15-year-old male complained of easy fatigability, leg weakness, and pain on exertion with episodes of syncope while playing baseball. His past medical history was significant for aortic coarctation associated with a congenital bovine hypoplastic aortic arch. A recent arteriogram revealed innominate and left common c...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2004.09.035
更新日期：2005-03-01 00:00:00
abstract：:The Society for Vascular Surgery considers the placement and maintenance of arteriovenous hemodialysis access to be an important component of any vascular surgery practice. Therefore, the Society has long been involved in setting the standards for the management of arteriovenous access. Formulating clinical recommenda...
journal_title：Journal of vascular surgery
pub_type： 杂志文章,评审
doi：10.1016/j.jvs.2008.08.045
更新日期：2008-11-01 00:00:00
abstract：:Although pseudoaneurysm of the thyrocervical trunk is seen with increasing frequency as a result of trauma or central venous cannulation, true aneurysm of the thyrocervical trunk is exceedingly rare. A 44-year-old woman presented with acute left neck swelling that progressed rapidly to respiratory distress and subsequ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2005.08.004
更新日期：2005-12-01 00:00:00
abstract：PURPOSE:This study evaluated the values of transcutaneous oxygen tension (TcPo(2)) measurement in diabetic patients compared with nondiabetic patients and assessed its reproducibility. METHODS:In 60 diabetic patients (type 1 and type 2 diabetes mellitus) without signs of peripheral arterial disease or neuropathy, we m...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2008.03.010
更新日期：2008-08-01 00:00:00
abstract：:The majority of patients with venous thromboembolism are successfully managed with anticoagulation therapy, but certain patients require inferior vena cava (IVC) interruption. Traditional open operations on the IVC have important disadvantages, among which are significant morbidity and mortality. Twenty years ago work...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：
更新日期：1984-05-01 00:00:00
abstract：OBJECTIVE:Renal artery in-stent restenosis (RAISR) is not an infrequent occurrence and may be in part responsible for the failure of renal stents to improve clinical outcome. A variety of treatments have been used to restore patency, with mixed results. These include repeated percutaneous transluminal renal angioplasty...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1016/j.jvs.2014.08.078
更新日期：2014-12-01 00:00:00
abstract：:Effort thrombosis of the subclavian vein (Paget-Schroetter syndrome) has long been considered a primary thrombotic process, but recent experience suggests that it may commonly result from repeated mechanical compression. Increased awareness of the pathophysiology of this syndrome can allow timely, improved diagnostic ...
journal_title：Journal of vascular surgery
pub_type： 杂志文章
doi：10.1067/mva.1992.41523
更新日期：1992-11-01 00:00:00
