LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 123

Search options

  1. Article ; Online: How to Do It: Transbrachial Impella Placement to Facilitate Percutaneous Coronary Intervention.

    Waterford, Stephen D / Schwartz, Bryan G / Ferdinand, Francis D / Kaczorowski, David J / Rizzoni, Walter E

    Innovations (Philadelphia, Pa.)

    2023  Volume 18, Issue 4, Page(s) 372–375

    Abstract: A 64-year-old man with diffusely diseased iliofemoral vessels and an ejection fraction of 20% to 25% presented with a non-ST elevation myocardial infarction and proximal left anterior descending (LAD) and left circumflex (LCx) coronary artery disease, ... ...

    Abstract A 64-year-old man with diffusely diseased iliofemoral vessels and an ejection fraction of 20% to 25% presented with a non-ST elevation myocardial infarction and proximal left anterior descending (LAD) and left circumflex (LCx) coronary artery disease, with a chronically occluded right coronary artery. The iliofemoral system was not suitable for Impella placement, and bilateral axillary arteries were heavily calcified. The proximal left brachial artery was chosen for placement of both an Impella CP (Abiomed, Danvers, MA, USA) and percutaneous coronary intervention (PCI) sheath through a graft sewn to the brachial artery in this single-access technique. A 6 mm graft was sewn to the brachial artery, through which the Impella CP was placed. The Impella CP sheath was then used to introduce a 7F sheath for PCI. Successful PCI with drug-eluting stents was carried out to the LAD and LCx arteries, the Impella was weaned and removed, and the graft was stapled. The patient was discharged without any access or PCI complications. This report demonstrates the feasibility of the single-access Impella technique through a brachial artery cutdown approach.
    MeSH term(s) Male ; Humans ; Middle Aged ; Percutaneous Coronary Intervention/methods ; Treatment Outcome ; Coronary Artery Disease/surgery ; Axillary Artery
    Language English
    Publishing date 2023-08-08
    Publishing country United States
    Document type Case Reports ; Journal Article
    ISSN 1559-0879
    ISSN (online) 1559-0879
    DOI 10.1177/15569845231190870
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Artificial Intelligence-enabled, Real-time Intraoperative Ultrasound Imaging of Neural Structures Within the Psoas: Validation in a Porcine Spine Model.

    Carson, Tyler / Ghoshal, Goutam / Cornwall, George Bryan / Tobias, Richard / Schwartz, David G / Foley, Kevin T

    Spine

    2021  Volume 46, Issue 3, Page(s) E146–E152

    Abstract: Study design: Experimental in-vivo animal study.: Objective: The aim of this study was to evaluate an Artificial Intelligence (AI)-enabled ultrasound imaging system's ability to detect, segment, classify, and display neural and other structures ... ...

    Abstract Study design: Experimental in-vivo animal study.
    Objective: The aim of this study was to evaluate an Artificial Intelligence (AI)-enabled ultrasound imaging system's ability to detect, segment, classify, and display neural and other structures during trans-psoas spine surgery.
    Summary of background data: Current methodologies for intraoperatively localizing and visualizing neural structures within the psoas are limited and can impact the safety of lateral lumbar interbody fusion (LLIF). Ultrasound technology, enhanced with AI-derived neural detection algorithms, could prove useful for this task.
    Methods: The study was conducted using an in vivo porcine model (50 subjects). Image processing and machine learning algorithms were developed to detect neural and other anatomic structures within and adjacent to the psoas muscle while using an ultrasound imaging system during lateral lumbar spine surgery (SonoVision,™ Tissue Differentiation Intelligence, USA). The imaging system's ability to detect and classify the anatomic structures was assessed with subsequent tissue dissection. Dice coefficients were calculated to quantify the performance of the image segmentation.
    Results: The AI-trained ultrasound system detected, segmented, classified, and displayed nerve, psoas muscle, and vertebral body surface with high sensitivity and specificity. The mean Dice coefficient score for each tissue type was >80%, indicating that the detected region and ground truth were >80% similar to each other. The mean specificity of nerve detection was 92%; for bone and muscle, it was >95%. The accuracy of nerve detection was >95%.
    Conclusion: This study demonstrates that a combination of AI-derived image processing and machine learning algorithms can be developed to enable real-time ultrasonic detection, segmentation, classification, and display of critical anatomic structures, including neural tissue, during spine surgery. AI-enhanced ultrasound imaging can provide a visual map of important anatomy in and adjacent to the psoas, thereby providing the surgeon with critical information intended to increase the safety of LLIF surgery.Level of Evidence: N/A.
    MeSH term(s) Algorithms ; Animals ; Artificial Intelligence/standards ; Female ; Humans ; Image Processing, Computer-Assisted/methods ; Image Processing, Computer-Assisted/standards ; Intraoperative Neurophysiological Monitoring/methods ; Intraoperative Neurophysiological Monitoring/standards ; Lumbar Vertebrae/diagnostic imaging ; Lumbar Vertebrae/surgery ; Machine Learning/standards ; Models, Animal ; Psoas Muscles/diagnostic imaging ; Psoas Muscles/surgery ; Reproducibility of Results ; Spinal Fusion/methods ; Spinal Fusion/standards ; Swine ; Ultrasonography/methods ; Ultrasonography/standards
    Language English
    Publishing date 2021-01-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 752024-4
    ISSN 1528-1159 ; 0362-2436
    ISSN (online) 1528-1159
    ISSN 0362-2436
    DOI 10.1097/BRS.0000000000003704
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Metoclopramide and digoxin cause 22 episodes of bradyarrhythmias.

    Schwartz, Bryan G

    The American journal of medicine

    2010  Volume 123, Issue 6, Page(s) e5–6

    MeSH term(s) Atrial Fibrillation/drug therapy ; Atrial Fibrillation/etiology ; Atrial Fibrillation/physiopathology ; Bradycardia/chemically induced ; Bradycardia/physiopathology ; Burns/complications ; Digoxin/administration & dosage ; Digoxin/adverse effects ; Electrocardiography ; Follow-Up Studies ; Heart Rate/drug effects ; Humans ; Injections, Intravenous ; Male ; Metoclopramide/administration & dosage ; Metoclopramide/adverse effects ; Middle Aged ; Tachycardia, Paroxysmal/chemically induced ; Tachycardia, Paroxysmal/physiopathology
    Chemical Substances Digoxin (73K4184T59) ; Metoclopramide (L4YEB44I46)
    Language English
    Publishing date 2010-06
    Publishing country United States
    Document type Case Reports ; Letter
    ZDB-ID 80015-6
    ISSN 1555-7162 ; 1873-2178 ; 0002-9343 ; 1548-2766
    ISSN (online) 1555-7162 ; 1873-2178
    ISSN 0002-9343 ; 1548-2766
    DOI 10.1016/j.amjmed.2009.10.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Acute and Subacute Triggers of Cardiovascular Events.

    Schwartz, Bryan G / Kloner, Robert A / Naghavi, Morteza

    The American journal of cardiology

    2018  Volume 122, Issue 12, Page(s) 2157–2165

    Abstract: ... patients (e.g., in secondary prevention clinics or those with coronary artery Calcium >75th percentile ...

    Abstract Inability to predict short-term cardiovascular (CV) events and take immediate preemptive actions has long been the Achilles heel of cardiology. However, certain triggers of these events have come to light. Although these triggers are nonspecific and are part of normal life, studying their temporal relationship with the onset of CV events provides an opportunity to alert high-risk atherosclerotic patients who may be most vulnerable to such triggers, the "vulnerable patient". Herein, we review the literature and shed light on the epidemiology and underlying pathophysiology of different triggers. We describe that certain adrenergic triggers can precipitate a CV event within minutes or hours; whereas triggers that elicit an immune or inflammatory response such as infections may tip an asymptomatic "vulnerable patient" to become symptomatic days and weeks later. In conclusion, healthcare providers should counsel high-risk CV patients (e.g., in secondary prevention clinics or those with coronary artery Calcium >75th percentile) on the topic, advise them to avoid such triggers, take protective measures once exposed, and seek emergency care immediately after becoming symptomatic after such triggers. Furthermore, clinical trials targeting triggers (prevention or intervention) are needed.
    MeSH term(s) Acute Disease ; Cardiovascular Diseases/etiology ; Humans ; Physical Exertion ; Precipitating Factors ; Risk Factors ; Stress, Psychological/complications
    Language English
    Publishing date 2018-09-13
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 80014-4
    ISSN 1879-1913 ; 0002-9149
    ISSN (online) 1879-1913
    ISSN 0002-9149
    DOI 10.1016/j.amjcard.2018.08.049
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Buccal caffeine strips for reversal of adverse symptoms of vasodilator stress.

    Elsadany, Mohammed / Stringer, Bryan / Bote, Josiah / Abdulla, Khaled H / Doran, Jesse A / Schwartz, Ronald G / Duvall, W Lane

    Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology

    2022  Volume 30, Issue 2, Page(s) 574–580

    Abstract: Background: Due to recurrent shortages of aminophylline, intravenous caffeine has emerged as a commonly used, safe and reliable method to treat adverse effects of vasodilator stress agents. We sought to evaluate the safety and effectiveness of buccal ... ...

    Abstract Background: Due to recurrent shortages of aminophylline, intravenous caffeine has emerged as a commonly used, safe and reliable method to treat adverse effects of vasodilator stress agents. We sought to evaluate the safety and effectiveness of buccal caffeine strips which are rapidly absorbed, inexpensive, readily available, and simplify caffeine administration.
    Methods: Consecutive patients undergoing regadenoson stress SPECT MPI were assessed for the occurrence of symptoms during testing over an 11-week period at a single metropolitan hospital. Adverse symptoms, including their severity and duration, were recorded at the time of testing. Patient satisfaction was rated on a scale of 1 to 5 (5 being the most satisfied). Patients received reversal with caffeine if symptoms were felt to be significant enough by the patient and physician performing the test. The treatment received alternated week to week between IV caffeine (60 mg) or 100 mg buccal caffeine strips. Caffeine was given at least 3 minutes after tracer injection. A rescue dose of IV caffeine was offered 10 minutes later if indicated.
    Results: Of the 122 patients enrolled in the study, 70 (57%) were included during buccal caffeine weeks and 52 (43%) during IV caffeine weeks, and only 28 (24%) received reversal with a caffeine agent. Seven (6%) received IV caffeine and 21 (17%) received buccal caffeine. There was no significant difference in symptom duration between IV and buccal caffeine after treatment (152.8 vs 163.4 seconds, P = 0.87). There was no significant difference in initial and final symptom severity between groups. Only 2 patients in the buccal group required rescue IV caffeine for ongoing symptoms and emesis. None of the IV group required a rescue dose. There was no significant difference in patient satisfaction between the groups (2.8 vs 3.2, P = 0.38).
    Conclusion: Buccal caffeine strips are a safe, well tolerated, and effective initial strategy to reverse adverse effects of vasodilator stress in the minority of patients who request it. Buccal caffeine alone or with IV rescue caffeine was highly effective in reversing adverse effects and was free of major adverse clinical events.
    MeSH term(s) Humans ; Vasodilator Agents/adverse effects ; Caffeine ; Aminophylline ; Tomography, Emission-Computed, Single-Photon/methods ; Drug-Related Side Effects and Adverse Reactions/etiology ; Myocardial Perfusion Imaging/methods ; Exercise Test/methods
    Chemical Substances Vasodilator Agents ; Caffeine (3G6A5W338E) ; Aminophylline (27Y3KJK423)
    Language English
    Publishing date 2022-07-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1212505-2
    ISSN 1532-6551 ; 1071-3581
    ISSN (online) 1532-6551
    ISSN 1071-3581
    DOI 10.1007/s12350-022-03039-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Personal journeys to and in human genetics and dysmorphology.

    Schwartz, Charles E / Aylsworth, Arthur S / Allanson, Judith / Battaglia, Agatino / Carey, John C / Curry, Cynthia J / Davies, Kay E / Eichler, Evan E / Graham, John M / Hall, Bryan / Hall, Judith G / Holmes, Lewis B / Hoyme, H Eugene / Hunter, Alasdair / Innis, Jeffrey / Johnson, John / Keppler-Noreuil, Kim M / Leroy, Jules G / Moore, Cynthia /
    Nelson, David L / Neri, Giovanni / Opitz, John M / Picketts, David / Raymond, F Lucy / Shalev, Stavit Allon / Stevenson, Roger E / Stumpel, Connie T R M / Sutherland, Grant / Viskochil, David H / Weaver, David D / Zackai, Elaine H

    American journal of medical genetics. Part A

    2024  Volume 194, Issue 6, Page(s) e63514

    Abstract: Genetics has become a critical component of medicine over the past five to six decades. Alongside genetics, a relatively new discipline, dysmorphology, has also begun to play an important role in providing critically important diagnoses to individuals ... ...

    Abstract Genetics has become a critical component of medicine over the past five to six decades. Alongside genetics, a relatively new discipline, dysmorphology, has also begun to play an important role in providing critically important diagnoses to individuals and families. Both have become indispensable to unraveling rare diseases. Almost every medical specialty relies on individuals experienced in these specialties to provide diagnoses for patients who present themselves to other doctors. Additionally, both specialties have become reliant on molecular geneticists to identify genes associated with human disorders. Many of the medical geneticists, dysmorphologists, and molecular geneticists traveled a circuitous route before arriving at the position they occupied. The purpose of collecting the memoirs contained in this article was to convey to the reader that many of the individuals who contributed to the advancement of genetics and dysmorphology since the late 1960s/early 1970s traveled along a journey based on many chances taken, replying to the necessities they faced along the way before finding full enjoyment in the practice of medical and human genetics or dysmorphology. Additionally, and of equal importance, all exhibited an ability to evolve with their field of expertise as human genetics became human genomics with the development of novel technologies.
    MeSH term(s) Humans ; Genetics, Medical ; History, 20th Century ; History, 21st Century ; Human Genetics
    Language English
    Publishing date 2024-02-08
    Publishing country United States
    Document type Journal Article ; Historical Article
    ZDB-ID 2108614-X
    ISSN 1552-4833 ; 0148-7299 ; 1552-4825
    ISSN (online) 1552-4833
    ISSN 0148-7299 ; 1552-4825
    DOI 10.1002/ajmg.a.63514
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Cryo-EM structure of anchorless RML prion reveals variations in shared motifs between distinct strains.

    Hoyt, Forrest / Standke, Heidi G / Artikis, Efrosini / Schwartz, Cindi L / Hansen, Bryan / Li, Kunpeng / Hughson, Andrew G / Manca, Matteo / Thomas, Olivia R / Raymond, Gregory J / Race, Brent / Baron, Gerald S / Caughey, Byron / Kraus, Allison

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 4005

    Abstract: Little is known about the structural basis of prion strains. Here we provide a high (3.0 Å) resolution cryo-electron microscopy-based structure of infectious brain-derived fibrils of the mouse anchorless RML scrapie strain which, like the recently ... ...

    Abstract Little is known about the structural basis of prion strains. Here we provide a high (3.0 Å) resolution cryo-electron microscopy-based structure of infectious brain-derived fibrils of the mouse anchorless RML scrapie strain which, like the recently determined hamster 263K strain, has a parallel in-register β-sheet-based core. Several structural motifs are shared between these ex vivo prion strains, including an amino-proximal steric zipper and three β-arches. However, detailed comparisons reveal variations in these shared structural topologies and other features. Unlike 263K and wildtype RML prions, the anchorless RML prions lack glycophosphatidylinositol anchors and are severely deficient in N-linked glycans. Nonetheless, the similarity of our anchorless RML structure to one reported for wildtype RML prion fibrils in an accompanying paper indicates that these post-translational modifications do not substantially alter the amyloid core conformation. This work demonstrates both common and divergent structural features of prion strains at the near-atomic level.
    MeSH term(s) Amyloid ; Animals ; Brain/metabolism ; Cryoelectron Microscopy ; Mice ; Prions/metabolism ; Scrapie ; Sheep
    Chemical Substances Amyloid ; Prions
    Language English
    Publishing date 2022-07-13
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Intramural
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-30458-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Long Term Survivals in Aggressive Primary Brain Malignancies Treated With an Adjuvant Ketogenic Diet.

    Schwartz, Kenneth A / Noel, Mary / Nikolai, Michele / Olson, Lawrence K / Hord, Norman G / Zakem, Micheal / Clark, Justin / Elnabtity, Mohamed / Figueroa, Bryan / Chang, Howard T

    Frontiers in nutrition

    2022  Volume 9, Page(s) 770796

    Abstract: Aggressive primary brain tumors (APBT) glioblastoma multiforme and grade IV astrocytoma are treated with multimodality treatments that include surgery to remove as much tumor as possible without sacrificing neurological function followed by radiation ... ...

    Abstract Aggressive primary brain tumors (APBT) glioblastoma multiforme and grade IV astrocytoma are treated with multimodality treatments that include surgery to remove as much tumor as possible without sacrificing neurological function followed by radiation therapy and chemotherapy usually temozolomide. Survivals in adults are in the range of 8-16 months. The addition of a ketogenic diet (KD) to rodents with transplanted brain tumors increased survival in nine of 11 animals to over 299 days compared to survival in untreated controls of 33 days and radiation only controls of 38 days. We treated humans with APBT with standard of care neurosurgery immediately followed by 6 weeks of an adjuvant ketogenic diet concurrent with radiation therapy and temozolomide. Twice daily measurements of blood ketones and glucose were recorded and the patients' diet was modified toward the goal of maintaining blood ketone levels approaching 3 mM. Of the nine patients who completed the protocol three younger patients age 32, 28, and 22 at enrollment are alive and employed with clinically stable disease and brain images 74, 58, and 52 months since diagnosis. All the six older patients mean age 55 have died with disease progression detected on average 8 months after Dx. In conclusion: 1. It is possible to implement and maintain dietary induced ketosis in patients with APBT; 2. The longer survivals observed in younger patients treated with KD need to be confirmed in larger studies that should be focused on younger patients possibly under age 40.
    Language English
    Publishing date 2022-05-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2776676-7
    ISSN 2296-861X
    ISSN 2296-861X
    DOI 10.3389/fnut.2022.770796
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Correction: HIV Viremia and T-cell Activation Differentially Affect the Performance of Glomerular Filtration Rate Equations Based on Creatinine and Cystatin C.

    Bhasin, Bhavna / Lau, Bryan / Atta, Mohamed G / Fine, Derek M / Estrella, Michelle M / Schwartz, George J / Lucas, Gregory M

    PloS one

    2019  Volume 14, Issue 4, Page(s) e0215630

    Abstract: This corrects the article DOI: 10.1371/journal.pone.0082028.]. ...

    Abstract [This corrects the article DOI: 10.1371/journal.pone.0082028.].
    Language English
    Publishing date 2019-04-16
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0215630
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: High-resolution structure and strain comparison of infectious mammalian prions.

    Kraus, Allison / Hoyt, Forrest / Schwartz, Cindi L / Hansen, Bryan / Artikis, Efrosini / Hughson, Andrew G / Raymond, Gregory J / Race, Brent / Baron, Gerald S / Caughey, Byron

    Molecular cell

    2021  Volume 81, Issue 21, Page(s) 4540–4551.e6

    Abstract: ... the most clearly infectious (e.g., ∼10 ...

    Abstract Within the extensive range of self-propagating pathologic protein aggregates of mammals, prions are the most clearly infectious (e.g., ∼10
    MeSH term(s) Amyloid/chemistry ; Animals ; Brain/metabolism ; Cryoelectron Microscopy/methods ; Glycolipids/chemistry ; Humans ; Image Processing, Computer-Assisted ; Imaging, Three-Dimensional ; Mice ; Phenotype ; Polysaccharides/chemistry ; Prion Proteins/chemistry ; Prions/chemistry ; Prions/ultrastructure ; Protein Binding ; Protein Structure, Secondary ; Thermodynamics
    Chemical Substances Amyloid ; Glycolipids ; Polysaccharides ; Prion Proteins ; Prions
    Language English
    Publishing date 2021-08-25
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Intramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1415236-8
    ISSN 1097-4164 ; 1097-2765
    ISSN (online) 1097-4164
    ISSN 1097-2765
    DOI 10.1016/j.molcel.2021.08.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top