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Benefits of ambulatory axillary intra-aortic balloon pump for circulatory support as bridge to heart transplant.
Umakanthan R, Hoff SJ, Solenkova N, Wigger MA, Keebler ME, Lenneman A, Leacche M, Disalvo TG, Ooi H, Naftilan AJ, Byrne JG, Ahmad RM
(2012) J Thorac Cardiovasc Surg 143: 1193-7
MeSH Terms: Adult, Ambulatory Care, Axillary Artery, Exercise Tolerance, Female, Heart Failure, Heart Transplantation, Hemodynamics, Humans, Intra-Aortic Balloon Pumping, Male, Middle Aged, Patient Selection, Recovery of Function, Retrospective Studies, Tennessee, Time Factors, Treatment Outcome, Walking, Young Adult
Show Abstract · Added May 27, 2014
OBJECTIVE - Axillary intra-aortic balloon pump therapy has been described as a bridge to transplant. Advantages over femoral intra-aortic balloon pump therapy include reduced incidence of infection and enhanced patient mobility. We identified the patients who would benefit most from this therapy while awaiting heart transplantation.
METHODS - We conducted a single-center, retrospective observational study to evaluate outcomes from axillary intra-aortic balloon pump therapy. These included hemodynamic parameters, duration of support, and success in bridging to transplant. We selected patients on the basis of history of sternotomy, elevated panel-reactive antibody, and small body habitus. Patients were made to ambulate aggressively beginning on postoperative day 1.
RESULTS - Between September 2007 and September 2010, 18 patients underwent axillary intra-aortic balloon pump therapy. All patients had the devices placed through the left axillary artery with a Hemashield side graft (Boston Scientific, Natick, Mass). Before axillary placement, patients underwent femoral placement to demonstrate hemodynamic benefit. Duration of support ranged from 5 to 63 days (median = 19 days). There was marked improvement in ambulatory potential and hemodynamic parameters, with minimal blood transfusion requirements. There were no device-related infections. Some 72% of the patients (13/18) were successfully bridged to transplantation.
CONCLUSIONS - Axillary intra-aortic balloon pump therapy provides excellent support for selected patients as a bridge to transplant. The majority of the patients were successfully bridged to transplant and discharged. Although this therapy has been described in previous studies, this is the largest series to incorporate a regimen of aggressive ambulation with daily measurements of distances walked.
Copyright © 2012. Published by Mosby, Inc.
0 Communities
1 Members
0 Resources
20 MeSH Terms
A novel AIF tracking method and comparison of DCE-MRI parameters using individual and population-based AIFs in human breast cancer.
Li X, Welch EB, Arlinghaus LR, Chakravarthy AB, Xu L, Farley J, Loveless ME, Mayer IA, Kelley MC, Meszoely IM, Means-Powell JA, Abramson VG, Grau AM, Gore JC, Yankeelov TE
(2011) Phys Med Biol 56: 5753-69
MeSH Terms: Algorithms, Axillary Artery, Breast Neoplasms, Computer Simulation, Contrast Media, Female, Gadolinium DTPA, Humans, Image Enhancement, Image Interpretation, Computer-Assisted, Magnetic Resonance Imaging, Models, Biological, Perfusion Imaging, Reproducibility of Results, Sensitivity and Specificity
Show Abstract · Added November 13, 2013
Quantitative analysis of dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) data requires the accurate determination of the arterial input function (AIF). A novel method for obtaining the AIF is presented here and pharmacokinetic parameters derived from individual and population-based AIFs are then compared. A Philips 3.0 T Achieva MR scanner was used to obtain 20 DCE-MRI data sets from ten breast cancer patients prior to and after one cycle of chemotherapy. Using a semi-automated method to estimate the AIF from the axillary artery, we obtain the AIF for each patient, AIF(ind), and compute a population-averaged AIF, AIF(pop). The extended standard model is used to estimate the physiological parameters using the two types of AIFs. The mean concordance correlation coefficient (CCC) for the AIFs segmented manually and by the proposed AIF tracking approach is 0.96, indicating accurate and automatic tracking of an AIF in DCE-MRI data of the breast is possible. Regarding the kinetic parameters, the CCC values for K(trans), v(p) and v(e) as estimated by AIF(ind) and AIF(pop) are 0.65, 0.74 and 0.31, respectively, based on the region of interest analysis. The average CCC values for the voxel-by-voxel analysis are 0.76, 0.84 and 0.68 for K(trans), v(p) and v(e), respectively. This work indicates that K(trans) and v(p) show good agreement between AIF(pop) and AIF(ind) while there is a weak agreement on v(e).
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8 Members
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15 MeSH Terms
Axillorenal arteriovenous graft: a new approach for dialysis access.
Karp SJ, Hawxby A, Burdick JF
(2004) J Vasc Surg 40: 379-80
MeSH Terms: Arteriovenous Shunt, Surgical, Axillary Artery, Graft Occlusion, Vascular, Humans, Kidney Failure, Chronic, Male, Middle Aged, Prosthesis Failure, Recurrence, Renal Dialysis, Renal Veins, Reoperation, Treatment Outcome
Show Abstract · Added May 22, 2014
As the population requiring hemodialysis grows, it becomes increasingly common to encounter patients with limited options for vascular access. Because inability to secure vascular access is a life-threatening problem, it is important to consider all possible options in each patient. We report a new arteriovenous grafting procedure in which the left renal vein is used for outflow in a patient with multiple venous occlusions. Patency of the graft continues 18 months after placement. This graft carries acceptable morbidity, and can be revised. Consideration of this graft is appropriate in selected patients.
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1 Members
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13 MeSH Terms
Adenosine, a metabolic trigger of the exercise pressor reflex in humans.
Costa F, Diedrich A, Johnson B, Sulur P, Farley G, Biaggioni I
(2001) Hypertension 37: 917-22
MeSH Terms: Adenosine, Adult, Afferent Pathways, Axillary Artery, Brachial Artery, Exercise, Forearm, Hand Strength, Humans, Injections, Intra-Arterial, Injections, Intravenous, Microdialysis, Muscle, Skeletal, Peroneal Nerve, Sympathetic Nervous System
Show Abstract · Added December 10, 2013
There is substantial evidence that adenosine activates muscle afferent nerve fibers leading to sympathetic stimulation, but the issue remains controversial. To further test this hypothesis, we used local injections of adenosine into the brachial artery while monitoring systemic muscle sympathetic nerve activity (MSNA) with peroneal microneurography. The increase in MSNA induced by 3 mg intrabrachial adenosine (106+/-32%) was abolished if forearm afferent traffic was interrupted by axillary ganglionic blockade (21+/-19%, n=5, P:<0.05). Furthermore, the increase in MSNA induced by intravenous adenosine was 3.7-fold lower and later (onset latency 20.9+/-4.8 seconds versus 8.5+/-1 seconds) than intrabrachial adenosine. Finally, we used forearm exercise (dynamic handgrip at 50% and 15% maximal voluntary contraction, MVC), with or without superimposed ischemia, to modulate interstitial levels of adenosine (estimated with microdialysis) while monitoring MSNA. Fifteen minutes of intense (50% MVC) and moderate (15% MVC) exercise increased adenosine dialysate concentrations from 0.31+/-0.1 to 1.24+/-0.4 micromol/L (528+/-292%) and from 0.1+/-0.02 to 0.419+/-0.16 micromol/L (303+/-99%), respectively (n=7, P:<0.01). MSNA increased 88+/-25% and 38+/-28%, respectively. Five minutes of moderate exercise increased adenosine from 0.095+/-0.02 to 0.25+/-0.12 micromol/L, and from 0.095+/-0.02 to 0.48+/-0.19 micromol/L when ischemia was superimposed on exercise (n=7, P:=0.01). The percent increase in MSNA induced by the various interventions correlated with the percent increase in dialysate adenosine levels (r=0.96). We conclude that adenosine activates muscle afferent nerves, triggering reflex sympathetic activation.
0 Communities
1 Members
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15 MeSH Terms