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Porszasz, Janos

Title(s)Adjunct Professor, Medicine
Phone(310) 222-8200
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Hansen JE, Dilektasli AG, Porszasz J, Stringer WW, Pak Y, Rossiter HB, Casaburi R. A New Bronchodilator Response Grading Strategy Identifies Distinct Patient Populations. Ann Am Thorac Soc. 2019 Dec; 16(12):1504-1517. PMID: 31404502.
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    2. Fernandes TM, Alotaibi M, Strozza D, Stringer W, Porszasz J, Faulkner G, Castro C, Tran D, Morris TA. Dyspnea Postpulmonary Embolism From the Physiological Dead Space Proportion and Stroke Volume Defects During Exercise. Chest. 2019 Nov 22. PMID: 31759962.
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    3. Balasubramanian A, MacIntyre NR, Henderson RJ, Jensen RL, Kinney G, Stringer WW, Hersh CP, Bowler RP, Casaburi R, Han MK, Porszasz J, Barr RG, Make BJ, Wise RA, McCormack MC. Diffusing Capacity of Carbon Monoxide in Assessment of COPD. Chest. 2019 Dec; 156(6):1111-1119. PMID: 31352035.
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    4. Stringer WW, Porszasz J, Bhatt SP, McCormack MC, Make BJ, Casaburi R. Physiologic Insights from the COPD Genetic Epidemiology Study. Chronic Obstr Pulm Dis. 2019 07 24; 6(3):256-266. PMID: 31342731.
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    5. Dilektasli AG, Porszasz J, Stringer WW, Casaburi R. Physiologic Effects of Oxygen Supplementation During Exercise in Chronic Obstructive Pulmonary Disease. Clin Chest Med. 2019 06; 40(2):385-395. PMID: 31078216.
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    6. Pornsuriyasak P, Rambod M, Effros RM, Casaburi R, Porszasz J. Oxygen Uptake and Lactate Kinetics in Patients with Chronic Obstructive Pulmonary Disease during Heavy Intensity Exercise: Role of Pedaling Cadence. COPD. 2018 06; 15(3):283-293. PMID: 30156941.
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    7. Tan C, Rossiter HB, Porszasz J, Bowen TS, Witte KK, Stringer WW, Casaburi R, Hansen JE. Reliability and Physiological Interpretation of Pulmonary Gas Exchange by "Circulatory Equivalents" in Chronic Heart Failure. J Am Heart Assoc. 2018 03 27; 7(7). PMID: 29588313.
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    8. Porszasz J, Carraro N, Cao R, Gore A, Ma S, Jiang T, Maltais F, Ferguson GT, O'Donnell DE, Shaikh A, Rossiter HB, Casaburi R. Effect of tiotropium on spontaneous expiratory flow-volume curves during exercise in GOLD 1-2 COPD. Respir Physiol Neurobiol. 2018 05; 251:8-15. PMID: 29438808.
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    9. Li YN, Shapiro B, Kim JC, Zhang M, Porszasz J, Bross R, Feroze U, Upreti R, Martin D, Kalantar-Zadeh K, Kopple JD. Association between quality of life and anxiety, depression, physical activity and physical performance in maintenance hemodialysis patients. Chronic Dis Transl Med. 2016 Jun; 2(2):110-119. PMID: 29063031.
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    10. Cannon DT, Coelho AC, Cao R, Cheng A, Porszasz J, Casaburi R, Rossiter HB. Skeletal muscle power and fatigue at the tolerable limit of ramp-incremental exercise in COPD. J Appl Physiol (1985). 2016 12 01; 121(6):1365-1373. PMID: 27660300.
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    11. Adami A, Cao R, Porszasz J, Casaburi R, Rossiter HB. Reproducibility of NIRS assessment of muscle oxidative capacity in smokers with and without COPD. Respir Physiol Neurobiol. 2017 01; 235:18-26. PMID: 27659351.
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    12. Varga J, Casaburi R, Ma S, Hecht A, Hsia D, Somfay A, Porszasz J. Relation of concavity in the expiratory flow-volume loop to dynamic hyperinflation during exercise in COPD. Respir Physiol Neurobiol. 2016 12; 234:79-84. PMID: 27575552.
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    13. Dilektasli AG, Porszasz J, Casaburi R, Stringer WW, Bhatt SP, Pak Y, Rossiter HB, Washko G, Castaldi PJ, Estepar RSJ, Hansen JE. A Novel Spirometric Measure Identifies Mild COPD Unidentified by Standard Criteria. Chest. 2016 Nov; 150(5):1080-1090. PMID: 27452770.
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    14. Kim V, Zhao H, Boriek AM, Anzueto A, Soler X, Bhatt SP, Rennard SI, Wise R, Comellas A, Ramsdell JW, Kinney GL, Han MK, Martinez CH, Yen A, Black-Shinn J, Porszasz J, Criner GJ, Hanania NA, Sharafkhaneh A, Crapo JD, Make BJ, Silverman EK, Curtis JL. Persistent and Newly Developed Chronic Bronchitis Are Associated with Worse Outcomes in Chronic Obstructive Pulmonary Disease. Ann Am Thorac Soc. 2016 07; 13(7):1016-25. PMID: 27158740.
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    15. Holm KE, Casaburi R, Cerreta S, Gussin HA, Husbands J, Porszasz J, Prieto-Centurion V, Sandhaus RA, Sullivan JL, Walsh LJ, Krishnan JA. Patient Involvement in the Design of a Patient-Centered Clinical Trial to Promote Adherence to Supplemental Oxygen Therapy in COPD. Patient. 2016 06; 9(3):271-9. PMID: 26521057.
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    16. Puente-Maestu L, Palange P, Casaburi R, Laveneziana P, Maltais F, Neder JA, O'Donnell DE, Onorati P, Porszasz J, Rabinovich R, Rossiter HB, Singh S, Troosters T, Ward S. Use of exercise testing in the evaluation of interventional efficacy: an official ERS statement. Eur Respir J. 2016 Feb; 47(2):429-60. PMID: 26797036.
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    17. Porszasz J, Blonshine S, Cao R, Paden HA, Casaburi R, Rossiter HB. Biological quality control for cardiopulmonary exercise testing in multicenter clinical trials. BMC Pulm Med. 2016 Jan 16; 16:13. PMID: 26775292.
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    18. Casaburi R, Nakata J, Bistrong L, Torres E, Rambod M, Porszasz J. Effect of Megestrol Acetate and Testosterone on Body Composition and Hormonal Responses in COPD Cachexia. Chronic Obstr Pulm Dis. 2015 Nov 09; 3(1):389-397. PMID: 28848861.
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    19. Gagnon P, Casaburi R, Saey D, Porszasz J, Provencher S, Milot J, Bourbeau J, O'Donnell DE, Maltais F. Cluster Analysis in Patients with GOLD 1 Chronic Obstructive Pulmonary Disease. PLoS One. 2015; 10(4):e0123626. PMID: 25906326.
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    20. Hansen JE, Porszasz J, Casaburi R, Stringer WW. Re-Defining Lower Limit of Normal for FEV1/FEV6, FEV1/FVC, FEV3/FEV6 and FEV3/FVC to Improve Detection of Airway Obstruction. Chronic Obstr Pulm Dis. 2015 Mar 10; 2(2):94-102. PMID: 28848835.
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    21. Kopple JD, Kim JC, Shapiro BB, Zhang M, Li Y, Porszasz J, Bross R, Feroze U, Upreti R, Kalantar-Zadeh K. Factors affecting daily physical activity and physical performance in maintenance dialysis patients. J Ren Nutr. 2015 Mar; 25(2):217-22. PMID: 25701942.
      View in: PubMed
    22. Casaburi R, Maltais F, Porszasz J, Albers F, Deng Q, Iqbal A, Paden HA, O'Donnell DE. Effects of tiotropium on hyperinflation and treadmill exercise tolerance in mild to moderate chronic obstructive pulmonary disease. Ann Am Thorac Soc. 2014 Nov; 11(9):1351-61. PMID: 25289942.
      View in: PubMed
    23. Watz H, Pitta F, Rochester CL, Garcia-Aymerich J, ZuWallack R, Troosters T, Vaes AW, Puhan MA, Jehn M, Polkey MI, Vogiatzis I, Clini EM, Toth M, Gimeno-Santos E, Waschki B, Esteban C, Hayot M, Casaburi R, Porszasz J, McAuley E, Singh SJ, Langer D, Wouters EF, Magnussen H, Spruit MA. An official European Respiratory Society statement on physical activity in COPD. Eur Respir J. 2014 Dec; 44(6):1521-37. PMID: 25359358.
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    24. Hansen JE, Porszasz J. Counterpoint: Is an increase in FEV1 and/or FVC = 12% of control and = 200 mL the best way to assess positive bronchodilator response? No. Chest. 2014 Sep; 146(3):538-541. PMID: 25180718.
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    25. Hansen JE, Porszasz J. Rebuttal from Drs Hansen and Porszasz. Chest. 2014 Sep; 146(3):542-544. PMID: 25180720.
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    26. O'Donnell DE, Maltais F, Porszasz J, Webb KA, Albers FC, Deng Q, Iqbal A, Paden HA, Casaburi R. The continuum of physiological impairment during treadmill walking in patients with mild-to-moderate COPD: patient characterization phase of a randomized clinical trial. PLoS One. 2014; 9(5):e96574. PMID: 24788342.
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    27. Zhang M, Kim JC, Li Y, Shapiro BB, Porszasz J, Bross R, Feroze U, Upreti R, Martin D, Kalantar-Zadeh K, Kopple JD. Relation between anxiety, depression, and physical activity and performance in maintenance hemodialysis patients. J Ren Nutr. 2014 Jul; 24(4):252-60. PMID: 24788308.
      View in: PubMed
    28. van der Vaart H, Murgatroyd SR, Rossiter HB, Chen C, Casaburi R, Porszasz J. Selecting constant work rates for endurance testing in COPD: the role of the power-duration relationship. COPD. 2014 Jun; 11(3):267-76. PMID: 24182350.
      View in: PubMed
    29. Porszasz J, Cao R, Morishige R, van Eykern LA, Stenzler A, Casaburi R. Physiologic effects of an ambulatory ventilation system in chronic obstructive pulmonary disease. Am J Respir Crit Care Med. 2013 Aug 01; 188(3):334-42. PMID: 23741986.
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    30. Porszasz J, Rambod M, van der Vaart H, Rossiter HB, Ma S, Kiledjian R, Casaburi R. Sinusoidal high-intensity exercise does not elicit ventilatory limitation in chronic obstructive pulmonary disease. Exp Physiol. 2013 Jun; 98(6):1102-14. PMID: 23335005.
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    31. Effros RM, Casaburi R, Porszasz J, Morales EM, Saraswat A, Rehan V. Comment on 'the effect of temperature on exhaled breath condensate collection'. J Breath Res. 2012 Dec; 6(4):048001; author reply 048002. PMID: 23326824.
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    32. Dransfield MT, Harnden S, Burton RL, Albert RK, Bailey WC, Casaburi R, Connett J, Cooper JA, Criner GJ, Curtis JL, Han MK, Make B, Marchetti N, Martinez FJ, McEvoy C, Nahm MH, Niewoehner DE, Porszasz J, Reilly J, Scanlon PD, Scharf SM, Sciurba FC, Washko GR, Woodruff PG, Lazarus SC. Long-term comparative immunogenicity of protein conjugate and free polysaccharide pneumococcal vaccines in chronic obstructive pulmonary disease. Clin Infect Dis. 2012 Sep; 55(5):e35-44. PMID: 22652582.
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    33. Roman MA, Casaburi JD, Porszasz J, Casaburi R. Noninvasive assessment of normality of VD/VT in clinical cardiopulmonary exercise testing utilizing incremental cycle ergometry. Eur J Appl Physiol. 2013 Jan; 113(1):33-40. PMID: 22562602.
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    34. Effros RM, Casaburi R, Porszasz J, Morales EM, Rehan V. Exhaled breath condensates: analyzing the expiratory plume. Am J Respir Crit Care Med. 2012 Apr 15; 185(8):803-4. PMID: 22505753.
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    35. Casaburi R, Porszasz J, Hecht A, Tiep B, Albert RK, Anthonisen NR, Bailey WC, Connett JE, Cooper JA, Criner GJ, Curtis J, Dransfield M, Lazarus SC, Make B, Martinez FJ, McEvoy C, Niewoehner DE, Reilly JJ, Scanlon P, Scharf SM, Sciurba FC, Woodruff P. Influence of lightweight ambulatory oxygen on oxygen use and activity patterns of COPD patients receiving long-term oxygen therapy. COPD. 2012 Feb; 9(1):3-11. PMID: 22292592.
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    36. Effros RM, Casaburi R, Porszasz J, Rehan V. Why conventional exhaled breath condensate pH studies cannot provide reliable estimates of airway acidification. Chest. 2011 Oct; 140(4):1099. PMID: 21972393.
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    37. Rambod M, Porszasz J, Make BJ, Crapo JD, Casaburi R. Six-minute walk distance predictors, including CT scan measures, in the COPDGene cohort. Chest. 2012 Apr; 141(4):867-875. PMID: 21960696.
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    38. Chavoshan B, Fournier M, Lewis MI, Porszasz J, Storer TW, Da X, Rambod M, Casaburi R. Testosterone and resistance training effects on muscle nitric oxide synthase isoforms in COPD men. Respir Med. 2012 Feb; 106(2):269-75. PMID: 21843929.
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    39. Effros RM, Casaburi R, Porszasz J, Rehan VK. Assessment of exhaled breath condensate pH. Am J Respir Crit Care Med. 2011 Apr 01; 183(7):952; author reply 952-3. PMID: 21471080.
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    40. Maltais F, Celli B, Casaburi R, Porszasz J, Jarreta D, Seoane B, Caracta C. Aclidinium bromide improves exercise endurance and lung hyperinflation in patients with moderate to severe COPD. Respir Med. 2011 Apr; 105(4):580-7. PMID: 21183326.
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    41. Ma S, Rossiter HB, Barstow TJ, Casaburi R, Porszasz J. Clarifying the equation for modeling of VO2 kinetics above the lactate threshold. J Appl Physiol (1985). 2010 Oct; 109(4):1283-4. PMID: 20940444.
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    42. Ma S, Hecht A, Varga J, Rambod M, Morford S, Goto S, Casaburi R, Porszasz J. Breath-by-breath quantification of progressive airflow limitation during exercise in COPD: a new method. Respir Med. 2010 Mar; 104(3):389-96. PMID: 19931441.
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    43. Casaburi R, Porszasz J. Constant work rate exercise testing: a tricky measure of exercise tolerance. COPD. 2009 Oct; 6(5):317-9. PMID: 19863360.
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    44. Hecht A, Ma S, Porszasz J, Casaburi R. Methodology for using long-term accelerometry monitoring to describe daily activity patterns in COPD. COPD. 2009 Apr; 6(2):121-9. PMID: 19378225.
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    45. Effros RM, Pornsuriyasak P, Porszasz J, Casaburi R. Indicator dilution measurements of extravascular lung water: basic assumptions and observations. Am J Physiol Lung Cell Mol Physiol. 2008 Jun; 294(6):L1023-31. PMID: 18359882.
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    46. Varga J, Porszasz J, Boda K, Casaburi R, Somfay A. Supervised high intensity continuous and interval training vs. self-paced training in COPD. Respir Med. 2007 Nov; 101(11):2297-304. PMID: 17689948.
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    47. Lewis MI, Fournier M, Storer TW, Bhasin S, Porszasz J, Ren SG, Da X, Casaburi R. Skeletal muscle adaptations to testosterone and resistance training in men with COPD. J Appl Physiol (1985). 2007 Oct; 103(4):1299-310. PMID: 17673568.
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    48. Casaburi R, Porszasz J. Reduction of hyperinflation by pharmacologic and other interventions. Proc Am Thorac Soc. 2006 Apr; 3(2):185-9. PMID: 16565430.
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    49. Porszasz J, Emtner M, Goto S, Somfay A, Whipp BJ, Casaburi R. Exercise training decreases ventilatory requirements and exercise-induced hyperinflation at submaximal intensities in patients with COPD. Chest. 2005 Oct; 128(4):2025-34. PMID: 16236851.
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    50. Casaburi R, Bhasin S, Cosentino L, Porszasz J, Somfay A, Lewis MI, Fournier M, Storer TW. Effects of testosterone and resistance training in men with chronic obstructive pulmonary disease. Am J Respir Crit Care Med. 2004 Oct 15; 170(8):870-8. PMID: 15271690.
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    51. Porszasz J, Casaburi R, Somfay A, Woodhouse LJ, Whipp BJ. A treadmill ramp protocol using simultaneous changes in speed and grade. Med Sci Sports Exerc. 2003 Sep; 35(9):1596-603. PMID: 12972882.
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    52. Emtner M, Porszasz J, Burns M, Somfay A, Casaburi R. Benefits of supplemental oxygen in exercise training in nonhypoxemic chronic obstructive pulmonary disease patients. Am J Respir Crit Care Med. 2003 Nov 01; 168(9):1034-42. PMID: 12869359.
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