John B. Chambers

John Burton Chambers (born c. 1955) is deputy head of the Sovereign Debt Ratings Group and chairman of the Sovereign Debt Committee at Standard and Poor's (S&P). Along with David T. Beers, Chambers earned significant attention in August 2011 for his role in downgrading the credit rating of United States Treasury bonds to AA+. Prior to this, the United States had maintained a AAA credit rating since 1941.

Chambers holds a BA in English literature and philosophy from Grinnell College (1977) and an MA in English literature from Columbia University. After working five years in various roles as sous directeur (deputy director), assistant comptroller, and vice president for Banque Indosuez, Chambers joined S&P in 1993. He became deputy head of S&P's Sovereign Debt Ratings Group in 1997. Provided by Wikipedia
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  1. 1
    The echocardiography of replacement heart valves

    The echocardiography of replacement heart valves by John B Chambers

    Published 2016-10-01
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  2. 2
    How to run a specialist valve clinic: the history, examination and exercise test

    How to run a specialist valve clinic: the history, examination and exercise test by John B Chambers

    Published 2019-11-01
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  3. 3
    The paravertebral panto: it's behind you!

    The paravertebral panto: it's behind you! by Kelly Victor, Michael M Sabetai, John B Chambers

    Published 2017-10-01
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  4. 4
    Rapid early rise in heart rate on treadmill exercise in patients with asymptomatic moderate or severe aortic stenosis: a new prognostic marker?

    Rapid early rise in heart rate on treadmill exercise in patients with asymptomatic moderate or severe aortic stenosis: a new prognostic marker? by John B Chambers, Ronak Rajani, Denise Parkin, Sahrai Saeed

    Published 2019-05-01
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  5. 5
    Simultaneous Dual Coronary Fistulas

    Simultaneous Dual Coronary Fistulas by Ioannis Ntalas, John B. Chambers, Júlia Karády, Ronak Rajani

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  6. 6
    A novel biopsychosocial, cognitive behavioural, stepped care intervention for patients with non-cardiac chest pain

    A novel biopsychosocial, cognitive behavioural, stepped care intervention for patients with non-cardiac chest pain by Elizabeth M. Marks, John B. Chambers, Victoria Russell, Myra S. Hunter

    Published 2016-01-01
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  7. 7
    A change in the NICE guidelines on antibiotic prophylaxis: British Heart Valve Society update

    A change in the NICE guidelines on antibiotic prophylaxis: British Heart Valve Society update by John B Chambers, Martin H Thornhill, Mark Dyer, David Shanson

    Published 2017-03-01
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  8. 8
    How to run a specialist valve clinic: a collaborative series from the British Heart Valve Society and the British Society of Echocardiography

    How to run a specialist valve clinic: a collaborative series from the British Heart Valve Society and the British Society of Echocardiography by John B Chambers MD FRCP, Richard P Steeds MA FRCP MD

    Published 2019-11-01
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  9. 9
    A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve

    A comparison of two forms of the continuity equation in the Trifecta bovine pericardial aortic valve by John B Chambers, Denise Parkin, James Roxburgh, Vinayak Bapat, Christopher Young

    Published 2016-05-01
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  10. 10
    Shared Decision-Making and Patient-Reported Outcome Measures in Valvular Heart Disease

    Shared Decision-Making and Patient-Reported Outcome Measures in Valvular Heart Disease by Sahrai Saeed, Elisabeth Skaar, Andrea Romarheim, John B. Chambers, Øyvind Bleie

    Published 2022-04-01
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  11. 11
    Indications for echocardiography of replacement heart valves: a joint statement from the British Heart Valve Society and British Society of Echocardiography

    Indications for echocardiography of replacement heart valves: a joint statement from the British Heart Valve Society and British Society of Echocardiography by John B Chambers, Madalina Garbi, Norman Briffa, Vishal Sharma, Richard P Steeds

    Published 2019-03-01
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  12. 12
    Exercise Treadmill Testing in Moderate or Severe Aortic Stenosis: The Left Ventricular Correlates of an Exaggerated Blood Pressure Rise

    Exercise Treadmill Testing in Moderate or Severe Aortic Stenosis: The Left Ventricular Correlates of an Exaggerated Blood Pressure Rise by Sahrai Saeed, Giuseppe Mancia, Ronak Rajani, Reinhard Seifert, Denise Parkin, John B. Chambers

    Published 2018-11-01
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  13. 13
    Echocardiography and monitoring patients receiving dopamine agonist therapy for hyperprolactinaemia: a joint position statement of the British Society of Echocardiography, the British Heart Valve Society and the Society for Endocrinology

    Echocardiography and monitoring patients receiving dopamine agonist therapy for hyperprolactinaemia: a joint position statement of the British Society of Echocardiography, the Brit... by Richard P Steeds, Craig E Stiles, Vishal Sharma, John B Chambers, Guy Lloyd, William Drake

    Published 2019-02-01
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  14. 14
    Author correction: Echocardiographic assessment of pulmonary hypertension: standard operating procedure

    Author correction: Echocardiographic assessment of pulmonary hypertension: standard operating procedure by Petros Nihoyannopoulos, Navroz D. Masani, John B. Chambers, Michael Bellamy, David Dawson, Julia Grapsa, Luke S. Howard, J. Simon R. Gibbs

    Published 2012-12-01
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  15. 15
    Echocardiographic assessment of pulmonary hypertension: standard operating procedure

    Echocardiographic assessment of pulmonary hypertension: standard operating procedure by Julia Grapsa, J. Simon R. Gibbs, Petros Nihoyannopoulos, Luke S. Howard, Navroz D. Masani, John B. Chambers, Michael Bellamy, David Dawson

    Published 2012-09-01
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  16. 16
    Impact of gender, ethnicity and social deprivation on access to surgical or transcatheter aortic valve replacement in aortic stenosis: a retrospective database study in England

    Impact of gender, ethnicity and social deprivation on access to surgical or transcatheter aortic valve replacement in aortic stenosis: a retrospective database study in England by John B Chambers, Enoch Akowuah, Daniel J Blackman, Caoimhe T Rice, Clare E Appleby, Benoy N Shah, Sophie Barnett, Shea P O'Connell

    Published 2023-11-01
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  17. 17
    First-phase ejection fraction by cardiovascular magnetic resonance predicts outcomes in aortic stenosis

    First-phase ejection fraction by cardiovascular magnetic resonance predicts outcomes in aortic stenosis by Haotian Gu, Rong Bing, Calvin Chin, Lingyun Fang, Audrey C. White, Russell Everett, Nick Spath, Eunsoo Park, John B. Chambers, David E. Newby, Amedeo Chiribiri, Marc R. Dweck, Phil Chowienczyk

    Published 2021-06-01
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  18. 18
    Report from the Annual Conference of the British Society of Echocardiography, November 2016, Queen Elizabeth II Conference Centre, London

    Report from the Annual Conference of the British Society of Echocardiography, November 2016, Queen Elizabeth II Conference Centre, London by Richard P. Steeds, Martin R. Cowie, Bushra S. Rana, John B. Chambers, Simon Ray, Janaki Srinivasan, Konstantin Schwarz, Christopher J. Neil, Caroline Scally, John D. Horowitz, Michael P. Frenneaux, Cristina Pislaru, Dana K. Dawson, Oliver J. Rothwell, Keith George, John D. Somauroo, Rachel Lord, Mike Stembridge, Rob Shave, Martin Hoffman, Euan A. Ashley, Francois Haddad, Thijs M. H. Eijsvogels, David Oxborough, Reinette Hampson, Chris D. Kinsey, Sothinathan Gurunathan, Anastasia Vamvakidou, Nikolaos Karogiannis, Roxy Senior, Shahram Ahmadvazir, Benoy N. Shah, Konstantinos Zacharias, Dan Bowen, Shaun Robinson, Ugochukwu Ihekwaba, Karen Parker, James Boyd, Cameron G. Densem, Charlotte Atkinson, Jonathan Hinton, Edmund B. Gaisie, Dhrubo J. Rakhit, Arthur M. Yue, Paul R. Roberts, Dean Thomas, Pat Phen, Jonathan Sibley, Sarah Fergey, Paul Russhard

    Published 2017-09-01
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