488 results match your criteria p=005 posterior


Interatrial distance predicts the necessity of additional carina ablation to isolate the right-sided pulmonary veins.

Heart Rhythm O2 2020 Oct 25;1(4):259-267. Epub 2020 Aug 25.

Department of Cardiology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.

Background: Ablation of the pulmonary vein (PV) carina is occasionally required for PV isolation (PVI). Marshall bundle and epicardial connections between the right-sided PV (RtPV) carina and right atrium (RA) may be one of the mechanisms that necessitates carina ablation.

Objective: We sought to clarify anatomical characteristics predictive of the necessity of carina ablation. Read More

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October 2020

In Vivo Kinematic Analysis of Lateral Meniscal Allograft Transplantation With Soft Tissue Fixation.

Orthop J Sports Med 2021 May 21;9(5):23259671211000459. Epub 2021 May 21.

Clinica Ortopedica e Traumatologica II, Istituto Ortopedico Rizzoli, Bologna, Italy.

Background: Lateral meniscal deficiency increases the pivot shift in the knee, and although meniscal allograft transplantation (MAT) is a well-established procedure with satisfactory clinical results, biomechanical studies have failed to show whether this procedure is able to restore knee kinematics.

Purpose: To assess, in vivo, the kinematic effect of lateral MAT in anterior cruciate ligament-intact knees, with a particular focus on the pivot-shift maneuver.

Study Design: Controlled laboratory study. Read More

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Can Imaging Characteristics on Magnetic Resonance Imaging Predict the Acuity of a Lumbar Disc Herniation?

Int J Spine Surg 2021 Jun 1;15(3):458-465. Epub 2021 Apr 1.

Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, Pennsylvania.

Background: Currently, no authors of existing studies have attempted to classify the signal characteristics of disc herniation on magnetic resonance imaging (MRI) and their temporal relationship to symptoms of lumbar radiculopathy. The purpose of this study was to determine whether the MRI signal characteristics are predictive of acuity of symptoms in patients with lumbar disc herniation (LDH).

Methods: A retrospective cohort study was conducted on patients treated at an academic center for LDH from 2015 to 2018. Read More

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Foot Posture and Plantar Loading With Ankle Bracing.

J Athl Train 2021 May;56(5):461-472

Kevin P. Granata Biomechanics Lab, Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg.

Context: Arch height is one important aspect of foot posture. An estimated 20% of the population has pes planus and 20% has pes cavus. These abnormal foot postures can alter lower extremity kinematics and plantar loading and contribute to injury risk. Read More

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A risk prediction model for endothelial keratoplasty after uncomplicated cataract surgery in Fuchs endothelial corneal dystrophy.

Am J Ophthalmol 2021 May 2. Epub 2021 May 2.

Cornea Unit, Department of Ophthalmology, Ramón y Cajal University Hospital, IRYCIS, Madrid (Spain).

Purpose: To develop a risk prediction model for endothelial keratoplasty (EK) after uncomplicated cataract surgery in Fuchs endothelial corneal dystrophy (FECD) using Scheimpflug imaging.

Design: Prospective, observational cohort study.

Methods: The study was conducted at the Ramón y Cajal University Hospital (Madrid, Spain) on 127 eyes from 93 consecutive patients with vision loss, FECD, and cataracts. Read More

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The Ankle-Pelvic Angle (APA) and Global Lower Extremity Angle (GLA): Summary Measurements of Pelvic and Lower Extremity Compensation.

Int J Spine Surg 2021 Feb 12;15(1):130-136. Epub 2021 Feb 12.

Hospital for Joint Diseases at NYU Langone Medical Center, New York, New York.

Background: Adult sagittal spinal deformity (SSD) leads to the recruitment of compensatory mechanisms to maintain standing balance. After regional spinal compensation is exhausted, lower extremity compensation is recruited. Knee flexion, ankle flexion, and sacrofemoral angle increase to drive pelvic shift posterior and increase pelvic tilt. Read More

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February 2021

Relationship of surgeon experience and outcomes of surgery for degenerative mitral valve disease.

J Card Surg 2021 Apr 24. Epub 2021 Apr 24.

Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA.

Objective: To assess the impact of surgeon experience on the outcomes of degenerative mitral valve disease.

Methods: We reviewed all patients who had surgery for degenerative mitral valve disease between 2011 and 2016. Experienced surgeon was defined as performing ≥ 25 mitral valve operations/year. Read More

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Association of Ligamentous Laxity, Male Sex, Chronicity, Meniscal Injury, and Posterior Tibial Slope With a High-Grade Preoperative Pivot Shift: A Post Hoc Analysis of the STABILITY Study.

Orthop J Sports Med 2021 Apr 6;9(4):23259671211000038. Epub 2021 Apr 6.

Investigation performed at the Fowler Kennedy Sport Medicine Clinic, Western University, London, Ontario, Canada.

Background: A spectrum of anterolateral rotatory laxity exists in anterior cruciate ligament (ACL)-injured knees. Understanding of the factors contributing to a high-grade pivot shift continues to be refined.

Purpose: To investigate factors associated with a high-grade preoperative pivot shift and to evaluate the relationship between this condition and baseline patient-reported outcome measures (PROMs). Read More

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Unraveling Deep Gray Matter Atrophy and Iron and Myelin Changes in Multiple Sclerosis.

AJNR Am J Neuroradiol 2021 Apr 22. Epub 2021 Apr 22.

Institute of Biostructure and Bioimaging, (S.M., M.Q., G.P.) National Research Council, Naples, Italy

Background And Purpose: Modifications of magnetic susceptibility have been consistently demonstrated in the subcortical gray matter of MS patients, but some uncertainties remain concerning the underlying neurobiological processes and their clinical relevance. We applied quantitative susceptibility mapping and longitudinal relaxation rate relaxometry to clarify the relative contribution of atrophy and iron and myelin changes to deep gray matter damage and disability in MS.

Materials And Methods: Quantitative susceptibility mapping and longitudinal relaxation rate maps were computed for 91 patients and 55 healthy controls from MR images acquired at 3T. Read More

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Immediate effect of prefabricated and UCBL foot orthoses on alignment of midfoot and forefoot in young people with symptomatic flexible flatfoot: A radiographic evaluation.

Prosthet Orthot Int 2021 Apr 13. Epub 2021 Apr 13.

Department of Orthotics and Prosthetics, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran Department of Basic Sciences, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Alberta, Canada.

Background: Radiographic imaging has been considered the gold standard in evaluating the skeletal alignment of the foot in static weightbearing. The effects of foot orthoses on the alignment of foot bones have been mostly evaluated using lateral view x-rays. The posterior-anterior view has not been investigated extensively. Read More

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Retro-Tubercle Biplanar Opening Wedge High Tibial Osteotomy Is Favorable for the Patellofemoral Joint But Not for the Osteotomized Tubercle Itself Compared With Supra-Tubercle Osteotomy.

Arthroscopy 2021 Mar 18. Epub 2021 Mar 18.

Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Gyeonggi-do, South Korea. Electronic address:

Purpose: To identify whether retro-tubercle opening-wedge high tibial osteotomy (RT-OWHTO) produces more favorable radiographic outcomes on patellofemoral joint alignment and clinical outcomes than supra-tubercle opening-wedge high tibial osteotomy (ST-OWHTO).

Methods: From January 2017 to July 2018, patients who underwent biplanar OWHTO were allocated to 1 of 2 groups (ST-OWHTO and RT-OWHTO). Plain radiographs and computed tomography were used to analyze patellofemoral alignment and other radiologic parameters representing osteotomy configurations. Read More

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Sagittal Inclination Angle of Graft Is Associated With Knee Stability After Anatomic Anterior Cruciate Ligament Reconstruction.

Arthroscopy 2021 Mar 17. Epub 2021 Mar 17.

Zenshukai Hospital Gunma Sports Medicine Research Center, Gunma, Japan.

Purpose: To evaluate whether the sagittal inclination angle (SIA) of a graft is associated with postoperative knee stability after anatomic anterior cruciate ligament (ACL) reconstruction.

Methods: All patients who had undergone anatomic ACL reconstruction between April 2014 and September 2015 in addition to volunteers with no history of knee injury were eligible for inclusion in this study. The patients were evaluated by magnetic resonance imaging of the knee in full extension at 1 year after surgery, as were volunteers. Read More

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The Association between Morphological and Functional Characteristics of the Bicuspid Aortic Valve and Bicuspid Aortopathy.

Korean J Radiol 2021 Jun 24;22(6):890-900. Epub 2021 Feb 24.

Department of Cardiovascular Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.

Objective: To identify the association between morphological and functional characteristics of the bicuspid aortic valve (BAV) and bicuspid aortopathy and to identify the determinants of aortic dilatation using transthoracic echocardiography (TTE) and cardiac computed tomography (CCT).

Materials And Methods: This study included 312 subjects (mean [SD] age, 52.7 [14. Read More

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Morphological Characteristics of Passive and Active Structures of the Foot Across Populations With Different Levels of Physical Activity.

J Sport Rehabil 2021 Mar 3:1-7. Epub 2021 Mar 3.

Background: Imaging diagnosis plays a fundamental role in the evaluation and management of injuries suffered in sports activities.

Objective: To analyze the differences in the thickness of the Achilles tendon, patellar tendon, plantar fascia, and posterior tibial tendon in the following levels of physical activity: persons who run regularly, persons otherwise physically active, and persons with a sedentary lifestyle.

Design: Cross-sectional and observational. Read More

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Distance of the Posterior Interosseous Nerve From the Bicipital (Radial) Tuberosity at Varying Positions of Forearm Rotation: A Magnetic Resonance Imaging Study With Clinical Implications.

Am J Sports Med 2021 04 26;49(5):1152-1159. Epub 2021 Feb 26.

NYU Langone Health, New York, New York, USA.

Background: The proximity of the posterior interosseous nerve (PIN) to the bicipital tuberosity is clinically important in the increasingly popular anterior single-incision technique for distal biceps tendon repair. Maximal forearm supination is recommended during tendon reinsertion from the anterior approach to ensure the maximum protective distance of the PIN from the bicipital tuberosity.

Purpose: To compare the location of the PIN on magnetic resonance imaging (MRI) relative to bicortical drill pin instrumentation for suspensory button fixation via the anterior single-incision approach in varying positions of forearm rotation. Read More

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Thrombectomy for Primary Distal Posterior Cerebral Artery Occlusion Stroke: The TOPMOST Study.

JAMA Neurol 2021 Apr;78(4):434-444

Department of Interventional Neuroradiology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.

Importance: Clinical evidence of the potential treatment benefit of mechanical thrombectomy for posterior circulation distal, medium vessel occlusion (DMVO) is sparse.

Objective: To investigate the frequency as well as the clinical and safety outcomes of mechanical thrombectomy for isolated posterior circulation DMVO stroke and to compare them with the outcomes of standard medical treatment with or without intravenous thrombolysis (IVT) in daily clinical practice.

Design, Setting, And Participants: This multicenter case-control study analyzed patients who were treated for primary distal occlusion of the posterior cerebral artery (PCA) of the P2 or P3 segment. Read More

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Prognostic nutritional index is related to myocardial performance index in newly diagnosed nondiabetic hypertensive patients.

Clin Exp Hypertens 2021 May 20;43(4):378-383. Epub 2021 Feb 20.

Faculty of Medicine, Department of Cardiology, Recep Tayyip Erdogan University, Rize, Turkey.

: Arterial hypertension (AH) leads to systolic and/or diastolic dysfunction of the left ventricle (LV) by causing structural changes in the myocardium. Myocardial performance index (MPI) provides the evaluation of LV systolic and diastolic functions together. Prognostic nutritional index (PNI) is an indicator of immunonutritional status. Read More

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Outcomes after first relapse of childhood intracranial ependymoma.

Pediatr Blood Cancer 2021 Feb 9:e28930. Epub 2021 Feb 9.

Dana-Farber/Boston Children's Cancer and Blood Disorder Center, Boston, Massachusetts, USA.

Background: Ependymoma is the third most common malignant CNS tumor in children. Despite multimodal therapy, prognosis of relapsed ependymoma remains poor. Approaches to therapy for relapsed ependymoma are varied. Read More

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February 2021

Anterior cruciate ligament reconstruction: the role of lateral posterior tibial slope as a potential risk factor for failure.

Acta Biomed 2020 12 30;91(14-S):e2020024. Epub 2020 Dec 30.

Clinic of Orthopedics, Academic Hospital of Udine, Udine, Italy Medical Department, Universitiy of Udine, Italy.

Background and aim of the work Anterior cruciate ligament (ACL) reconstruction is an extremely frequent surgery. The analysis of anatomical factors is becoming increasingly important and the study of clinical, arthroscopic and radiological methods to evaluate and understand them aims to positively affect the patient's outcome. This work aims to analyze the role of Lateral Posterior Tibial Slope (LPTS) as a potential risk factor for ACL reconstruction failure Materials and Methods At the Clinic of Orthopedic of Udine, between November 2018 and August 2020, 47 revisions of the ACL were performed. Read More

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December 2020

Factors Influencing Severity of Medication-Related Osteonecrosis of the Jaw: A Retrospective Study.

J Oral Maxillofac Surg 2021 Jan 6. Epub 2021 Jan 6.

Professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China.

Purpose: The progression of medication-related osteonecrosis of the jaw (MRONJ) is influenced by many factors. This study aimed to identify the clinical risk factors associated with severe MRONJ (stage 3).

Patients And Methods: The data of patients with MRONJ who were hospitalized between July 2013 and December 2019 were retrospectively analyzed. Read More

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January 2021

Proton Therapy for Pediatric Ependymoma: Mature Results From a Bicentric Study.

Int J Radiat Oncol Biol Phys 2021 Jul 27;110(3):815-820. Epub 2021 Jan 27.

Department of Radiation Oncology, Harvard Medical School, Boston, Massachusetts.

Purpose: To report the long-term efficacy and toxicity of proton therapy for pediatric ependymoma.

Methods And Materials: Between 2000 and 2019, 386 children with nonmetastatic grade 2/3 intracranial ependymoma received proton therapy at 1 of 2 academic institutions. Median age at treatment was 3. Read More

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Tourniquet Use Improves Cement Penetration and Reduces Radiolucent Line Progression at 5 Years After Total Knee Arthroplasty.

J Arthroplasty 2021 Jul 5;36(7S):S209-S214. Epub 2021 Jan 5.

Colorado Joint Replacement, Denver, CO; Department of Mechanical and Materials Engineering, University of Denver, Denver, CO.

Background: Although the effect of tourniquet use during total knee arthroplasty (TKA) on functional outcomes is controversial, there are little data examining cement penetration and implant stability. This study examines the effect of tourniquet use on cement penetration and radiolucent line (RLL) progression.

Methods: Patients undergoing primary total knee arthroplasty with a single surgeon, implant, and cement with minimum 5-year follow-up were retrospectively reviewed. Read More

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Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension.

Radiology 2021 Mar 26;298(3):589-596. Epub 2021 Jan 26.

From the Departments of Clinical Radiology (Y.Y., T.K., K.S., T.H., Y.M., K.I.), Cardiovascular Medicine (K.A., K. Hosokawa), and Health Sciences (H.Y.), Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan; Division of Radiology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan (K. Hioki); and Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan (M.N.).

Background Right ventricular (RV) extracellular volumes (ECVs), as a surrogate for histologic fibrosis, have not been sufficiently investigated. Purpose To evaluate and compare RV and left ventricular (LV) ECVs obtained with dual-layer spectral detector CT (DLCT) in chronic thromboembolic pulmonary hypertension (CTEPH) and investigate the clinical importance of RV ECV. Materials and Methods Retrospective analysis was performed on data from 31 patients with CTEPH (17 were not treated with pulmonary endarterectomy [PEA] or balloon pulmonary angioplasty [BPA] and 14 were) and eight control subjects who underwent myocardial delayed enhancement (MDE) DLCT from January 2019 to June 2020. Read More

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A Comprehensive Evaluation of Spine Kinematics, Kinetics, and Trunk Muscle Activities During Fatigue-Induced Repetitive Lifting.

Hum Factors 2021 Jan 26:18720820983621. Epub 2021 Jan 26.

48439 Tehran University of Medical Sciences, Iran.

Objective: Spine kinematics, kinetics, and trunk muscle activities were evaluated during different stages of a fatigue-induced symmetric lifting task over time.

Background: Due to neuromuscular adaptations, postural behaviors of workers during lifting tasks are affected by fatigue. Comprehensive aspects of these adaptations remain to be investigated. Read More

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January 2021

A Novel Perioperative Multidose Methadone-Based Multimodal Analgesic Strategy in Children Achieved Safe and Low Analgesic Blood Methadone Levels Enabling Opioid-Sparing Sustained Analgesia With Minimal Adverse Effects.

Anesth Analg 2021 Jan 21. Epub 2021 Jan 21.

Division of Clinical Pharmacology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana.

Background: Intraoperative methadone, a long-acting opioid, is increasingly used for postoperative analgesia, although the optimal methadone dosing strategy in children is still unknown. The use of a single large dose of intraoperative methadone is controversial due to inconsistent reductions in total opioid use in children and adverse effects. We recently demonstrated that small, repeated doses of methadone intraoperatively and postoperatively provided sustained analgesia and reduced opioid use without respiratory depression. Read More

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January 2021

A NOVEL SCORING SYSTEM FOR THE RISK OF PAPILLARY THYROID CANCER METASTASES IN LYMPH NODES POSTERIOR TO THE RIGHT OF THE RECURRENT LARYNGEAL NERVE.

Endocr Pract 2021 Jan 18;27(1):15-20. Epub 2020 Nov 18.

Department of Head and Neck Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China. Electronic address:

Objective: Some surgeons believe that dissection posterior to the right recurrent laryngeal nerve lymph node (PRRLN-LN) is unnecessary for the low metastasis rate and high complication risk. However, persistent metastatic lymph nodes may have a higher recurrence rate, surgical risk, and complications. Thus, it is important to distinguish patients who require PRRLN-LN dissection. Read More

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January 2021

Predictors of Pediatric Anterior Cruciate Ligament Injury: The Influence of Steep Lateral Posterior Tibial Slope and Its Relationship to the Lateral Meniscus.

Arthroscopy 2021 05 13;37(5):1599-1609. Epub 2021 Jan 13.

MSk Lab, Imperial College London, Sir Michael Uren Biomedical Engineering Research Hub, London, United Kingdom.

Purpose: To examine the relationship between posterior tibial slope and lateral meniscal bone angle (LMBA) on anterior cruciate ligament (ACL) tear risk in a pediatric population.

Methods: In this case-control study, non-contact ACL-injured pediatric patients with no significant lateral meniscal lesions were matched by age and sex in a 1:1 ratio to a group of radiologically normal controls. Knee magnetic resonance imaging (MRI) studies were analyzed by 3 independent, blinded observers measuring the medial posterior tibial slope (MTS), lateral posterior tibial slope (LTS), and LMBA. Read More

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Intrapartum ultrasound at the initiation of the active second stage of labor predicts spontaneous vaginal delivery.

Am J Obstet Gynecol MFM 2021 01 19;3(1):100249. Epub 2020 Oct 19.

Department of Obstetrics and Gynecology, Kaplan Medical Center, Rehovot, Israel, affiliated to the Hebrew University and Hadassah Faculty of Medicine, Jerusalem, Israel. Electronic address:

Background: Longer duration of active pushing during labor is associated with a higher rate of operative delivery and an increased risk of maternal and neonatal complications. Although immediate pushing at complete dilatation is associated with lower rates of chorioamnionitis and postpartum hemorrhage, it is also associated with a longer duration of pushing.

Objective: This study aimed to evaluate whether fetal head station and position, as assessed by ultrasound at the beginning of the pushing process, can predict the mode of delivery and duration of pushing in nulliparous women. Read More

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January 2021

Synthetic MRI demonstrates prolonged regional relaxation times in the brain of preterm born neonates with severe postnatal morbidity.

Neuroimage Clin 2021 24;29:102544. Epub 2020 Dec 24.

Department of Radiology, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Brussels, Belgium.

Background: To identify preterm infants at risk for neurodevelopment impairment that might benefit from early neurorehabilitation, early prognostic biomarkers of future outcomes are needed.

Objective: To determine whether synthetic MRI is sensitive to age-related changes in regional tissue relaxation times in the brain of preterm born neonates when scanned at term equivalent age (TEA, 37-42 weeks), and to investigate whether severe postnatal morbidity results in prolonged regional tissue relaxation times.

Materials And Methods: This retrospective study included 70 very preterm born infants scanned with conventional and synthetic MRI between January 2017 and June 2019 at TEA. Read More

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December 2020

Acceptable Long-Term Outcomes of Arthroscopic Bone Grafting for Recurrent Posterior Shoulder Instability: Minimum Follow-Up of 5 Years.

Arthroscopy 2021 03 29;37(3):816-823. Epub 2020 Dec 29.

Alps Surgery Institute, Clinique Générale Annecy, Annecy, France.

Purpose: To examine the long-term clinical outcome associated with arthroscopically placed autologous iliac crest bone graft (ICBG) for recurrent posterior shoulder instability.

Methods: From January 2008 to December 2013, patients treated with posterior ICBG and a minimum follow-up of 5 years were included. Clinical outcome of patients operated with a posterior ICBG was analyzed with multiple patient-reported outcome measures included Constant (CS), American Shoulder and Elbow Surgeons (ASES), Walch-Duplay, and Rowe scores, shoulder subjective value, and pain visual analog score. Read More

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