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Robert Lederman

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https://www.readbyqxmd.com/read/29778867/predicting-left-ventricular-outflow-tract-obstruction-despite-anterior-mitral-leaflet-resection-the-skirt-neolvot
#1
Jaffar M Khan, Toby Rogers, Vasilis C Babaliaros, Melissa Fusari, Adam B Greenbaum, Robert J Lederman
No abstract text is available yet for this article.
May 11, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29737030/transcatheter-electrosurgery-in-bipolar-or-monopolar-modes
#2
EDITORIAL
Jaffar M Khan, Robert J Lederman
Transcatheter electrosurgery has emerging value in a range of other new procedures that require traversing tissue (transcaval access, transcatheter Glenn Shunt) or slicing tissue (LAMPOON slicing of the mitral valve and BASILICA slicing of the aortic valve). This is the first report of bipolar radiofrequency wires used to cross lesions in humans, reported here in seven re-entry CTO cases. The bipolar configuration may provide directionality to charge without need for wire alignment and advancement, but is theoretically disadvantageous for tissue "cutting" because of problems with charge concentration...
May 1, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29622147/transcatheter-laceration-of-aortic-leaflets-to-prevent-coronary-obstruction-during-transcatheter-aortic-valve-replacement-concept-to-first-in-human
#3
Jaffar M Khan, Danny Dvir, Adam B Greenbaum, Vasilis C Babaliaros, Toby Rogers, Gabriel Aldea, Mark Reisman, G Burkhard Mackensen, Marvin H K Eng, Gaetano Paone, Dee Dee Wang, Robert A Guyton, Chandan M Devireddy, William H Schenke, Robert J Lederman
OBJECTIVES: This study sought to develop a novel technique called bioprosthetic or native aortic scallop intentional laceration to prevent coronary artery obstruction (BASILICA). BACKGROUND: Coronary artery obstruction is a rare but fatal complication of transcatheter aortic valve replacement (TAVR). METHODS: We lacerated pericardial leaflets in vitro using catheter electrosurgery, and tested leaflet splaying after benchtop TAVR. The procedure was tested in swine...
April 9, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29605244/transcatheter-mitral-valve-replacement-after-transcatheter-electrosurgical-laceration-of-alfieri-stitch-elastic-first-in-human-report
#4
Jaffar M Khan, Robert J Lederman, Saurabh Sanon, Bradley G Leshnower, Altayyeb Yousef, Patrick Gleason, Stamatios Lerakis, Toby Rogers, Adam B Greenbaum, Vasilis C Babaliaros
No abstract text is available yet for this article.
March 22, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29552426/physiological-recording-in-the-mri-environment-prime-mri-compatible-hemodynamic-recording-system
#5
John W Kakareka, Anthony Z Faranesh, Randall H Pursley, Adrienne Campbell-Washburn, Daniel A Herzka, Toby Rogers, Josh Kanter, Kanishka Ratnayaka, Robert J Lederman, Thomas J Pohida
Hemodynamic recording during interventional cardiovascular procedures is essential for procedural guidance, monitoring patient status, and collection of diagnostic information. Recent advances have made interventions guided by magnetic resonance imaging (MRI) possible and attractive in certain clinical scenarios. However, in the MRI environment, electromagnetic interference (EMI) can cause severe distortions and artifacts in acquired hemodynamic waveforms. The primary aim of this paper was to develop and validate a system to minimize EMI on electrocardiogram (ECG) and invasive blood pressure (IBP) signals...
2018: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29405564/transcatheter-pledget-assisted-suture-tricuspid-annuloplasty-pasta-to-create-a-double-orifice-valve
#6
Jaffar M Khan, Toby Rogers, William H Schenke, Adam B Greenbaum, Vasilis C Babaliaros, Gaetano Paone, Rajiv Ramasawmy, Marcus Y Chen, Daniel A Herzka, Robert J Lederman
OBJECTIVES: Pledget-assisted suture tricuspid valve annuloplasty (PASTA) is a novel technique using marketed equipment to deliver percutaneous trans-annular sutures to create a double-orifice tricuspid valve. BACKGROUND: Tricuspid regurgitation is a malignant disease with high surgical mortality and no commercially available transcatheter solution in the US. METHODS: Two iterations of PASTA were tested using trans-apical or trans-jugular access in swine...
February 6, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29314639/percutaneous-transaxillary-access-for-tavr-another-opportunity-to-stay-out-of-the-chest
#7
EDITORIAL
Toby Rogers, Robert J Lederman
Axillary arteries are less calcified and tortuous than iliofemoral arteries Axillary artery minimal luminal diameters are usually >5.0 mm even in patients with iliofemoral artery diameters < 5.0 mm Axillary and transcaval access are the only non-surgical fully percutaneous options for large-bore arterial access for TAVR or mechanical circulatory support devices.
January 1, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28940991/guidewire-electrosurgery-assisted-trans-septal-puncture
#8
Jaffar M Khan, Toby Rogers, Marvin H Eng, Robert J Lederman, Adam B Greenbaum
OBJECTIVES: Electrifying a coronary guidewire may be a simple escalation strategy when trans-septal needle puncture is unsuccessful. BACKGROUND: Radiofrequency energy to facilitate trans-septal puncture through a dedicated device is costly and directly through a trans-septal needle may be less safe. Our technique overcomes these limitations. METHODS: The technique was used in patients when trans-septal needle penetration failed despite excessive force or tenting of the atrial septum...
May 1, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28874164/radiation-free-cmr-diagnostic-heart-catheterization-in-children
#9
Kanishka Ratnayaka, Joshua P Kanter, Anthony Z Faranesh, Elena K Grant, Laura J Olivieri, Russell R Cross, Ileen F Cronin, Karin S Hamann, Adrienne E Campbell-Washburn, Kendall J O'Brien, Toby Rogers, Michael S Hansen, Robert J Lederman
BACKGROUND: Children with heart disease may require repeated X-Ray cardiac catheterization procedures, are more radiosensitive, and more likely to survive to experience oncologic risks of medical radiation. Cardiovascular magnetic resonance (CMR) is radiation-free and offers information about structure, function, and perfusion but not hemodynamics. We intend to perform complete radiation-free diagnostic right heart catheterization entirely using CMR fluoroscopy guidance in an unselected cohort of pediatric patients; we report the feasibility and safety...
September 6, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28805039/unnatural-milieu-thrombus-after-transcatheter-mitral-valve-replacement
#10
EDITORIAL
Jaffar M Khan, Robert J Lederman
What the article teaches Transcatheter heart valve thrombosis in the mitral position causes increased valve gradients, valve dysfunction, and symptoms, and may be associated with lack of therapeutic anticoagulation. How it will impact practice Anticoagulation with a vitamin K antagonist should be considered in all patients undergoing transcatheter mitral valve replacement. What new research/study would help answer the question posed Efficacy, optimal duration, and safety of anticoagulation therapy, balancing reduced thrombosis against increased bleeding risk, needs to be assessed in larger cohort studies and prospective trials...
August 1, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28774381/first-in-human-closed-chest-transcatheter-superior-cavopulmonary-anastomosis
#11
Kanishka Ratnayaka, John W Moore, Rodrigo Rios, Robert J Lederman, Sanjeet R Hegde, Howaida G El-Said
BACKGROUND: In the care of patients with congenital heart disease, percutaneous interventional treatments have supplanted many surgical approaches for simple lesions, such as atrial septal defect. By contrast, complex congenital heart defects continue to require open-heart surgery. In single-ventricle patients, a staged approach is employed, which requires multiple open-heart surgeries and significant attendant morbidity and mortality. A nonsurgical transcatheter alternative would be attractive...
August 8, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28750642/cmr-fluoroscopy-right-heart-catheterization-for-cardiac-output-and-pulmonary-vascular-resistance-results-in-102-patients
#12
Toby Rogers, Kanishka Ratnayaka, Jaffar M Khan, Annette Stine, William H Schenke, Laurie P Grant, Jonathan R Mazal, Elena K Grant, Adrienne Campbell-Washburn, Michael S Hansen, Rajiv Ramasawmy, Daniel A Herzka, Hui Xue, Peter Kellman, Anthony Z Faranesh, Robert J Lederman
BACKGROUND: Quantification of cardiac output and pulmonary vascular resistance (PVR) are critical components of invasive hemodynamic assessment, and can be measured concurrently with pressures using phase contrast CMR flow during real-time CMR guided cardiac catheterization. METHODS: One hundred two consecutive patients underwent CMR fluoroscopy guided right heart catheterization (RHC) with simultaneous measurement of pressure, cardiac output and pulmonary vascular resistance using CMR flow and the Fick principle for comparison...
July 27, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28734716/short-term-clinical-outcome-of-an-anatomic-short-stem-humeral-component-in-total-shoulder-arthroplasty
#13
Anthony A Romeo, Robert J Thorsness, Shelby A Sumner, Reuben Gobezie, Evan S Lederman, Patrick J Denard
BACKGROUND: Short-stem press-fit humeral components have recently been developed in an effort to preserve bone in total shoulder arthroplasty (TSA), but few studies have reported outcomes of these devices. The purpose of this study was to evaluate the short-term clinical outcomes of an anatomic short-stem humeral component in TSA. We hypothesized that the implant would lead to significant functional improvement with low rates of radiographic loosening. METHODS: A multicenter retrospective review was performed of TSAs using an anatomic short-stem humeral component (Apex; Arthrex, Inc...
January 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28692969/an-mr-based-model-for-cardio-respiratory-motion-compensation-of-overlays-in-x-ray-fluoroscopy
#14
Peter Fischer, Anthony Faranesh, Thomas Pohl, Andreas Maier, Toby Rogers, Kanishka Ratnayaka, Robert Lederman, Joachim Hornegger
In X-ray fluoroscopy, static overlays are used to visualize soft tissue. We propose a system for cardiac and respiratory motion compensation of these overlays. It consists of a 3-D motion model created from real-time magnetic resonance (MR) imaging. Multiple sagittal slices are acquired and retrospectively stacked to consistent 3-D volumes. Slice stacking considers cardiac information derived from the ECG and respiratory information extracted from the images. Additionally, temporal smoothness of the stacking is enhanced...
January 2018: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28645230/implementation-in-action-how-australian-exercise-physiologists-approach-exercise-prescription-for-people-with-mental-illness
#15
Robert Stanton, Simon Rosenbaum, Oscar Lederman, Brenda Happell
BACKGROUND: Accredited Exercise Physiologists (AEPs) are trained to deliver exercise and physical activity interventions for people with chronic and complex health conditions including those with mental illness. However, their views on exercise for mental illness, their exercise prescription practices, and need for further training are unknown. AIMS: To examine the way in which Australian AEPs prescribe exercise for people with mental illness. METHODS: Eighty-one AEPs (33...
April 2018: Journal of Mental Health
https://www.readbyqxmd.com/read/28618274/the-relationship-between-birth-and-placental-weights-changes-with-placental-size
#16
Carolyn M Salafia, Beata Dygulska, Gabriela Perez-Avilan, Rebecca Schmitt, Drucilla J Roberts, Xilu Ma, Dawn P Misra, Alana Devine Dunn, Sam Ngu, Hussam Inany, Nayaab Khawar, Giashuddin Shah, Pramod Narula, Sanford Lederman
No abstract text is available yet for this article.
August 2017: Early Human Development
https://www.readbyqxmd.com/read/28585448/embedding-exercise-interventions-as-routine-mental-health-care-implementation-strategies-in-residential-inpatient-and-community-settings
#17
Oscar Lederman, Shuichi Suetani, Robert Stanton, Justin Chapman, Nicole Korman, Simon Rosenbaum, Philip B Ward, Dan Siskind
OBJECTIVES: Evaluation of physical activity (PA) programs among populations with severe mental illness (SMI) has predominately focused on efficacy and therapeutic benefits. There is now strong evidence to support the benefits of PA in people with SMI. What remains is a gap in the implementation of pragmatic and sustainable PA interventions in mental-health settings. The current paper provides examples of interventions that have been successfully implemented in Australian settings, identifies key components of successful PA interventions and outlines practical strategies that can assist with widespread implementation of PA interventions in mental-health settings...
May 1, 2017: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/28471059/long-or-redundant-leaflet-complicating-transcatheter-mitral-valve-replacement-case-vignettes-that-advocate-for-removal-or-reduction-of-the-anterior-mitral-leaflet
#18
Adam B Greenbaum, Jose F Condado, Marvin Eng, Stamatios Lerakis, Dee Dee Wang, Dennis W Kim, Robert J Lederman, Gaetano Paone, William W O Neill, Vinod H Thourani, Vasilis C Babaliaros
Transcatheter mitral valve replacement (TMVR) procedures can be an alternative to surgical valve replacement for high surgical risk patients with bioprosthetic mitral valves, annuloplasty rings, or severe mitral annular calcification (MAC). TMVR can trigger acute left ventricular outflow tract (LVOT) obstruction from permanent displacement of the native anterior mitral leaflet toward the left ventricular septum, more often among patients undergoing valve-in-ring and valve-in-MAC procedures. Although acute LVOT obstruction is well described in the literature, there are important additional complications of TMVR related to the length and/or redundancy of the anterior mitral valve that have been recognized after mitral valve surgery and have not been previously reported in the setting of TMVR...
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28427597/intentional-percutaneous-laceration-of%C3%A2-the%C3%A2-anterior-mitral-leaflet-to-prevent%C3%A2-outflow%C3%A2-obstruction-during-transcatheter-mitral-valve-replacement-first-in-human%C3%A2-experience
#19
MULTICENTER STUDY
Vasilis C Babaliaros, Adam B Greenbaum, Jaffar M Khan, Toby Rogers, Dee Dee Wang, Marvin H Eng, William W O'Neill, Gaetano Paone, Vinod H Thourani, Stamatios Lerakis, Dennis W Kim, Marcus Y Chen, Robert J Lederman
OBJECTIVES: This study sought to use a new catheter technique to split the anterior mitral valve leaflet (AML) and prevent iatrogenic left ventricular outflow tract (LVOT) obstruction immediately before transcatheter mitral valve replacement (TMVR). BACKGROUND: LVOT obstruction is a life-threatening complication of TMVR, caused by septal displacement of the AML. METHODS: The procedure was used in patients with severe mitral valve disease and prohibitive surgical risk...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28335897/mitral-loop-cerclage-annuloplasty-for-secondary-mitral-regurgitation-first-human-results
#20
Yong-Hyun Park, Min-Ku Chon, Robert J Lederman, Si-Chan Sung, Hyung-Gon Je, Ki-Seok Choo, Sang-Hyun Lee, Eun-Seok Shin, Jeong-Su Kim, Ki-Won Hwang, Soo-Yong Lee, Kook-Jin Chun, Cheol-Min Kim, June-Hong Kim
OBJECTIVES: This is an early feasibility clinical test of mitral loop cerclage annuloplasty to treat secondary mitral valve regurgitation. BACKGROUND: Secondary mitral regurgitation is characterized by cardiomyopathy, mitral annular enlargement, and leaflet traction contributing to malcoaptation. Transcatheter mitral loop cerclage applies circumferential compression to the mitral annulus by creating a loop through the coronary sinus across the interventricular septum, protecting entrapped coronary arteries from compression, and interactive annular reduction under echocardiographic guidance...
March 27, 2017: JACC. Cardiovascular Interventions
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