Scholars@Duke

• Background
• 

  Education, Training, & Certifications

  • M.D., University of Vienna (Austria) 1997
• 

  Duke Appointment History

  • Associate Professor of Medicine, Medicine, Cardiology, Medicine 2016 - 2019
  • Assistant Professor of Medicine, Medicine, Cardiology, Medicine 2010 - 2016
  • Medical Instructor in the Department of Medicine, Medicine, Cardiology, Medicine 2007 - 2010
• Research
• 

  Selected Grants

  • Medical Images, HTML5, and Clinical Trial Remote Collaboration awarded by Heart Imaging Technologies, LLC 2017 - 2019
  • Gadavist-enhanced CMRI to Detect Coronary Artery Disease (CAD) - GadaCAD2 awarded by Bayer Healthcare Pharmaceuticals Inc 2015 - 2017
  • Delayed-Enhancement Cardiac MRI: Prognostic Implications and Improved Imaging awarded by National Institutes of Health 2010 - 2015
• Publications & Artistic Works
• 

  Selected Publications

  • Academic Articles

    • Axelsson, Jimmy, Björn Wieslander, Robert Jablonowski, Igor Klem, Robin Nijveldt, Erik B. Schelbert, Peder Sörensson, et al. “Corrigendum to "Wieslander, et al., Ejection fraction in left bundle branch block is disproportionately reduced in relation to amount of myocardial scar" [J Electrocardiol 51(2018) 1071-1076]..” Journal of Electrocardiology 53 (March 2019). https://doi.org/10.1016/j.jelectrocard.2019.01.082.
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    • Loring, Zak, Brett D. Atwater, Xiaojuan Xia, Jimmy Axelsson, Igor Klem, Robin Nijveldt, Erik B. Schelbert, et al. “Low lead one ratio predicts clinical outcomes in left bundle branch block..” Journal of Cardiovascular Electrophysiology, February 10, 2019. https://doi.org/10.1111/jce.13875.
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    • Heitner, John F., Raymond J. Kim, Han W. Kim, Igor Klem, Dipan J. Shah, Dany Debs, Afshin Farzaneh-Far, et al. “Prognostic Value of Vasodilator Stress Cardiac Magnetic Resonance Imaging: A Multicenter Study With 48 000 Patient-Years of Follow-up..” Jama Cardiology, February 8, 2019. https://doi.org/10.1001/jamacardio.2019.0035.
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    • Khan, Mohammad A., Eric Y. Yang, Yang Zhan, Robert M. Judd, Wenyaw Chan, Faisal Nabi, John F. Heitner, et al. “Association of left atrial volume index and all-cause mortality in patients referred for routine cardiovascular magnetic resonance: a multicenter study..” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 21, no. 1 (January 7, 2019). https://doi.org/10.1186/s12968-018-0517-0.
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    • Kim, Han W., Wolfgang G. Rehwald, Elizabeth R. Jenista, David C. Wendell, Peter Filev, Lowie van Assche, Christoph J. Jensen, et al. “Dark-Blood Delayed Enhancement Cardiac Magnetic Resonance of Myocardial Infarction..” Jacc. Cardiovascular Imaging 11, no. 12 (December 2018): 1758–69. https://doi.org/10.1016/j.jcmg.2017.09.021.
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    • Zweerink, Alwin, Daniel J. Friedman, Igor Klem, Peter M. van de Ven, Caitlin Vink, P Stefan Biesbroek, Steen M. Hansen, et al. “Size Matters: Normalization of QRS Duration to Left Ventricular Dimension Improves Prediction of Long-Term Cardiac Resynchronization Therapy Outcome..” Circulation. Arrhythmia and Electrophysiology 11, no. 12 (December 2018). https://doi.org/10.1161/circep.118.006767.
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    • Axelsson, Jimmy, Björn Wieslander, Robert Jablonowski, Igor Klem, Robin Nijveldt, Erik B. Schelbert, Peder Sörensson, et al. “Ejection fraction in left bundle branch block is disproportionately reduced in relation to amount of myocardial scar..” Journal of Electrocardiology 51, no. 6 (November 2018): 1071–76. https://doi.org/10.1016/j.jelectrocard.2018.09.009.
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    • Romano, Simone, Robert M. Judd, Raymond J. Kim, Han W. Kim, Igor Klem, John F. Heitner, Dipan J. Shah, et al. “Feature-Tracking Global Longitudinal Strain Predicts Death in a Multicenter Population of Patients With Ischemic and Nonischemic Dilated Cardiomyopathy Incremental to Ejection Fraction and Late Gadolinium Enhancement..” Jacc. Cardiovascular Imaging 11, no. 10 (October 2018): 1419–29. https://doi.org/10.1016/j.jcmg.2017.10.024.
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    • Wieslander, Björn, Xiaojuan Xia, Robert Jablonowski, Jimmy Axelsson, Igor Klem, Robin Nijveldt, Charles Maynard, et al. “The ability of the electrocardiogram in left bundle branch block to detect myocardial scar determined by cardiovascular magnetic resonance..” Journal of Electrocardiology 51, no. 5 (September 2018): 779–86. https://doi.org/10.1016/j.jelectrocard.2018.05.019.
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    • Romano, Simone, Robert M. Judd, Raymond J. Kim, Han W. Kim, Igor Klem, John F. Heitner, Dipan J. Shah, Jennifer Jue, and Afshin Farzaneh-Far. “Left Ventricular Long-Axis Function Assessed with Cardiac Cine MR Imaging Is an Independent Predictor of All-Cause Mortality in Patients with Reduced Ejection Fraction: A Multicenter Study..” Radiology 286, no. 2 (February 2018): 452–60. https://doi.org/10.1148/radiol.2017170529.
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    • Chandy, Elizabeth, Alexander Ivanov, Devindra S. Dabiesingh, Alexandra Grossman, Prasanthi Sunkesula, Lakshmi Velagapudi, Virna L. Sales, et al. “Systemic involvement in ACS: Using CMR imaging to compare the aortic wall in patients with and without acute coronary syndrome..” Plos One 13, no. 12 (2018). https://doi.org/10.1371/journal.pone.0203514.
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    • Pueschner, Andreas, Pairoj Chattranukulchai, John F. Heitner, Dipan J. Shah, Brenda Hayes, Wolfgang Rehwald, Michele A. Parker, et al. “The Prevalence, Correlates, and Impact on Cardiac Mortality of Right Ventricular Dysfunction in Nonischemic Cardiomyopathy..” Jacc. Cardiovascular Imaging 10, no. 10 Pt B (October 2017): 1225–36. https://doi.org/10.1016/j.jcmg.2017.06.013.
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    • Ivanov, Alexander, Devindra S. Dabiesingh, Geetha P. Bhumireddy, Ambreen Mohamed, Ahmed Asfour, William M. Briggs, Jean Ho, et al. “Prevalence and Prognostic Significance of Left Ventricular Noncompaction in Patients Referred for Cardiac Magnetic Resonance Imaging..” Circ Cardiovasc Imaging 10, no. 9 (September 2017). https://doi.org/10.1161/CIRCIMAGING.117.006174.
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    • Klem, Igor, Einar Heiberg, Lowie Van Assche, Michele A. Parker, Han W. Kim, John D. Grizzard, Håkan Arheden, and Raymond J. Kim. “Sources of variability in quantification of cardiovascular magnetic resonance infarct size - reproducibility among three core laboratories..” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 19, no. 1 (August 11, 2017). https://doi.org/10.1186/s12968-017-0378-y.
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    • Romano, Simone, Robert M. Judd, Raymond J. Kim, Han W. Kim, Igor Klem, John Heitner, Dipan J. Shah, et al. “Association of Feature-Tracking Cardiac Magnetic Resonance Imaging Left Ventricular Global Longitudinal Strain With All-Cause Mortality in Patients With Reduced Left Ventricular Ejection Fraction..” Circulation 135, no. 23 (June 2017): 2313–15. https://doi.org/10.1161/CIRCULATIONAHA.117.027740.
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    • Huang, Hans, Prabhjot S. Nijjar, Jeffrey R. Misialek, Anne Blaes, Nicholas P. Derrico, Felipe Kazmirczak, Igor Klem, Afshin Farzaneh-Far, and Chetan Shenoy. “Accuracy of left ventricular ejection fraction by contemporary multiple gated acquisition scanning in patients with cancer: comparison with cardiovascular magnetic resonance..” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 19, no. 1 (March 24, 2017). https://doi.org/10.1186/s12968-017-0348-4.
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    • Ivanov, Alexander, Beata A. Kaczkowska, Saadat A. Khan, Jean Ho, Morteza Tavakol, Ashok Prasad, Geetha Bhumireddy, et al. “Review and Analysis of Publication Trends over Three Decades in Three High Impact Medicine Journals..” Plos One 12, no. 1 (January 20, 2017). https://doi.org/10.1371/journal.pone.0170056.
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    • Hamo, Carine E., Igor Klem, Sunil V. Rao, Vincent Songco, Samer Najjar, Edward G. Lakatta, Subha V. Raman, Robert A. Harrington, and John F. Heitner. “The Systematic Evaluation of Identifying the Infarct Related Artery Utilizing Cardiac Magnetic Resonance in Patients Presenting with ST-Elevation Myocardial Infarction..” Plos One 12, no. 1 (January 6, 2017). https://doi.org/10.1371/journal.pone.0169108.
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    • Di Marco, Andrea, Ignasi Anguera, Matthias Schmitt, Igor Klem, Tomas G. Neilan, James A. White, Marek Sramko, et al. “Late Gadolinium Enhancement and the Risk for Ventricular Arrhythmias or Sudden Death in Dilated Cardiomyopathy: Systematic Review and Meta-Analysis..” Jacc. Heart Failure 5, no. 1 (January 2017): 28–38. https://doi.org/10.1016/j.jchf.2016.09.017.
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    • Ivanov, Alexander, Ambreen Mohamed, Ahmed Asfour, Jean Ho, Saadat A. Khan, Onn Chen, Igor Klem, Kumudha Ramasubbu, Sorin J. Brener, and John F. Heitner. “Right atrial volume by cardiovascular magnetic resonance predicts mortality in patients with heart failure with reduced ejection fraction..” Plos One 12, no. 4 (January 2017). https://doi.org/10.1371/journal.pone.0173245.
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    • Ivanov, A., G. P. Bhumireddy, D. S. Dabiesingh, S. A. Khan, J. Ho, N. Krishna, N. Dontineni, et al. “Importance of papillary muscle infarction detected by cardiac magnetic resonance imaging in predicting cardiovascular events..” International Journal of Cardiology 220 (October 2016): 558–63. https://doi.org/10.1016/j.ijcard.2016.06.201.
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    • Park, Jun-Bean, Hyung-Kwan Kim, Ji-Hyun Jung, Igor Klem, Yeonyee E. Yoon, Seung-Pyo Lee, Eun-Ah Park, et al. “Prognostic Value of Cardiac MR Imaging for Preoperative Assessment of Patients with Severe Functional Tricuspid Regurgitation..” Radiology 280, no. 3 (September 2016): 723–34. https://doi.org/10.1148/radiol.2016151556.
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    • Klem, Igor. “Expanding CT Application to Myocardial Tissue Characterization..” Jacc. Cardiovascular Imaging 9, no. 7 (July 2016): 846–48. https://doi.org/10.1016/j.jcmg.2016.01.019.
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    • Leeters, Irene P. M., Ashlee Davis, Robbert Zusterzeel, Brett Atwater, Niels Risum, Peter Søgaard, Igor Klem, et al. “Left ventricular regional contraction abnormalities by echocardiographic speckle tracking in combined right bundle branch with left anterior fascicular block compared to left bundle branch block..” Journal of Electrocardiology 49, no. 3 (May 2016): 353–61. https://doi.org/10.1016/j.jelectrocard.2016.02.002.
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    • Ahmad, Ijaz G., Raushan K. Abdulla, Igor Klem, Roman Margulis, Alexander Ivanov, Ambreen Mohamed, Robert M. Judd, Salvatore Borges-Neto, Raymond J. Kim, and John F. Heitner. “Comparison of stress cardiovascular magnetic resonance imaging (CMR) with stress nuclear perfusion for the diagnosis of coronary artery disease..” Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology 23, no. 2 (April 2016): 287–97. https://doi.org/10.1007/s12350-015-0242-0.
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    • Åkerlund, Sofia, Björn Wieslander, Madeleine Turesson, Robin Nijveldt, Igor Klem, Jakob Almer, Henrik Engblom, Galen S. Wagner, Brett D. Atwater, and Martin Ugander. “Specificity for each of the 46 criteria of the Selvester QRS score for electrocardiographic myocardial scar sizing in left bundle branch block..” Journal of Electrocardiology 48, no. 5 (September 2015): 769–76. https://doi.org/10.1016/j.jelectrocard.2015.07.018.
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    • Wieslander, Björn, Robin Nijveldt, Igor Klem, Yuliya Lokhnygina, John Pura, Galen S. Wagner, Martin Ugander, and Brett D. Atwater. “Evaluation of Selvester QRS score for use in presence of conduction abnormalities in a broad population..” Am Heart J 170, no. 2 (August 2015): 346–52. https://doi.org/10.1016/j.ahj.2015.05.005.
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    • Kim, Eun Kyoung, Pairoj Chattranukulchai, and Igor Klem. “Cardiac Magnetic Resonance Scar Imaging for Sudden Cardiac Death Risk Stratification in Patients with Non-Ischemic Cardiomyopathy..” Korean Journal of Radiology 16, no. 4 (July 2015): 683–95. https://doi.org/10.3348/kjr.2015.16.4.683.
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    • Kim, Han W., Lowie Van Assche, Robert B. Jennings, W Benjamin Wince, Christoph J. Jensen, Wolfgang G. Rehwald, David C. Wendell, et al. “Relationship of T2-Weighted MRI Myocardial Hyperintensity and the Ischemic Area-At-Risk..” Circulation Research 117, no. 3 (July 2015): 254–65. https://doi.org/10.1161/CIRCRESAHA.117.305771.
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    • Ivanov, A., J. Yossef, A. Mohamed, J. Socolow, I. Gulkarov, B. Worku, P. Chattranukulchai, et al. “Evaluating change of function after revascularization in patients with multi vessel coronary artery disease, severely reduced left ventricular systolic function and no scar on CMR imaging.” Journal of Cardiovascular Magnetic Resonance, February 3, 2015, 1–2. https://doi.org/10.1186/1532-429X-17-S1-P169.
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    • Klem, I., E. Heiberg, L. van Assche, G. Wagner, M. Parker, H. W. Kim, J. D. Grizzard, H. Arheden, and R. Kim. “Sources of variability in quantification of CMR infarct size and their impact on sample size calculations - reproducibility among three core laboratories.” Journal of Cardiovascular Magnetic Resonance, February 3, 2015, 1–2. https://doi.org/10.1186/1532-429X-17-S1-P84.
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    • Chen, On, Abhishek Sharma, Ijaz Ahmad, Naji Bourji, Konstantin Nestoiter, Pauline Hua, Betty Hua, et al. “Correlation between pericardial, mediastinal, and intrathoracic fat volumes with the presence and severity of coronary artery disease, metabolic syndrome, and cardiac risk factors..” European Heart Journal Cardiovascular Imaging 16, no. 1 (January 2015): 37–46. https://doi.org/10.1093/ehjci/jeu145.
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    • Simprini, Lauren A., Anika Afroz, Mitchell A. Cooper, Igor Klem, Christoph Jensen, Raymond J. Kim, Monvadi B. Srichai, et al. “Routine cine-CMR for prosthesis-associated mitral regurgitation: a multicenter comparison to echocardiography..” The Journal of Heart Valve Disease 23, no. 5 (September 2014): 575–82.
    • Heitner, John F., Igor Klem, Derek Rasheed, Abhinav Chandra, Han W. Kim, Lowie M. R. Van Assche, Michele Parker, Robert M. Judd, James G. Jollis, and Raymond J. Kim. “Stress cardiac MR imaging compared with stress echocardiography in the early evaluation of patients who present to the emergency department with intermediate-risk chest pain..” Radiology 271, no. 1 (April 2014): 56–64. https://doi.org/10.1148/radiol.13130557.
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    • Oldan, Jorge Daniel, Igor Klem, and Salvador Borges-Neto. “Pulmonary venous stenosis on ventilation-perfusion scintigraphy: a correlation with dynamic magnetic resonance pulmonary angiography..” Clinical Nuclear Medicine 39, no. 3 (March 2014): 292–94. https://doi.org/10.1097/rlu.0000000000000344.
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    • Oldan, J. D., I. Klem, and S. Borges-Neto. “Pulmonary venous stenosis on ventilation-perfusion scintigraphy: a correlation with dynamic magnetic resonance pulmonary angiography..” Clinical Nuclear Medicine 39, no. 3 (January 1, 2014).
    • Jenista, E. R., W. G. Rehwald, E. L. Chen, H. W. Kim, I. Klem, M. A. Parker, and R. J. Kim. “Motion and flow insensitive adiabatic T2-preparation module for cardiac MR imaging at 3 tesla.” Magnetic Resonance in Medicine 70, no. 5 (November 1, 2013): 1360–68. https://doi.org/10.1002/mrm.24564.
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    • Jenista, Elizabeth R., Wolfgang G. Rehwald, Enn-Ling Chen, Han W. Kim, Igor Klem, Michele A. Parker, and Raymond J. Kim. “Motion and flow insensitive adiabatic T2 -preparation module for cardiac MR imaging at 3 Tesla..” Magnetic Resonance in Medicine 70, no. 5 (November 2013): 1360–68. https://doi.org/10.1002/mrm.24564.
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    • Klem, Igor, Jonathan W. Weinsaft, Tristram D. Bahnson, Don Hegland, Han W. Kim, Brenda Hayes, Michele A. Parker, Robert M. Judd, and Raymond J. Kim. “Assessment of myocardial scarring improves risk stratification in patients evaluated for cardiac defibrillator implantation..” Journal of the American College of Cardiology 60, no. 5 (July 2012): 408–20. https://doi.org/10.1016/j.jacc.2012.02.070.
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    • Greulich, Simon, Oliver Bruder, Michele Parker, Julia Schumm, Stefan Grün, Steffen Schneider, Igor Klem, Udo Sechtem, and Heiko Mahrholdt. “Comparison of exercise electrocardiography and stress perfusion CMR for the detection of coronary artery disease in women..” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 14 (January 2012). https://doi.org/10.1186/1532-429X-14-36.
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    • Heitner, John, Geetha P. Bhumireddy, Anna Lisa Crowley, Jonathan Weinsaft, Salman A. Haq, Igor Klem, Raymond J. Kim, and James G. Jollis. “Clinical application of cine-MRI in the visual assessment of mitral regurgitation compared to echocardiography and cardiac catheterization..” Plos One 7, no. 7 (January 2012). https://doi.org/10.1371/journal.pone.0040491.
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    • Hirsch, A., R. Nijveldt, and I. Klem. “Imaging in acute coronary syndrome.” Cardiology Research and Practice 1, no. 1 (December 1, 2011). https://doi.org/10.4061/2011/461720.
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    • Klem, Igor, Dipan J. Shah, Richard D. White, Dudley J. Pennell, Albert C. van Rossum, Matthias Regenfus, Udo Sechtem, et al. “Prognostic value of routine cardiac magnetic resonance assessment of left ventricular ejection fraction and myocardial damage: an international, multicenter study..” Circulation. Cardiovascular Imaging 4, no. 6 (November 2011): 610–19. https://doi.org/10.1161/circimaging.111.964965.
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    • Weinsaft, Jonathan W., Han W. Kim, Anna Lisa Crowley, Igor Klem, Chetan Shenoy, Lowie Van Assche, Rhoda Brosnan, et al. “LV thrombus detection by routine echocardiography: insights into performance characteristics using delayed enhancement CMR..” Jacc. Cardiovascular Imaging 4, no. 7 (July 2011): 702–12. https://doi.org/10.1016/j.jcmg.2011.03.017.
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    • Shenoy, Chetan, Igor Klem, Anna Lisa Crowley, Manesh R. Patel, Mark A. Winchester, Cynthia Owusu, and Gretchen G. Kimmick. “Cardiovascular complications of breast cancer therapy in older adults..” The Oncologist 16, no. 8 (January 2011): 1138–43. https://doi.org/10.1634/theoncologist.2010-0348.
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    • Siegler, Jason C., Shafiq Rehman, Geetha P. Bhumireddy, Raushan Abdula, Igor Klem, Sorin J. Brener, Leonard Lee, et al. “The accuracy of the electrocardiogram during exercise stress test based on heart size..” Plos One 6, no. 8 (January 2011). https://doi.org/10.1371/journal.pone.0023044.
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    • Heitner, John F., Geetha P. Bhumireddy, Peter J. Cawley, Igor Klem, Manesh R. Patel, Anna Lisa Crowley, Jonathan W. Weinsaft, et al. “The aorta wall of patients presenting to the emergency department with acute myocardial infarction by cardiac magnetic resonance..” Atherosclerosis 212, no. 1 (September 2010): 166–70. https://doi.org/10.1016/j.atherosclerosis.2010.05.002.
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    • Vavalle, John, Thomas M. Bashore, and Igor Klem. “Surprising finding of a primary pericardial mesothelioma..” The International Journal of Cardiovascular Imaging 26, no. 6 (August 2010): 625–27. https://doi.org/10.1007/s10554-010-9615-2.
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    • Banko, Lesan T., Salman A. Haq, Debroah A. Rainaldi, Igor Klem, Jason Siegler, Joshua Fogel, Terrence J. Sacchi, and John F. Heitner. “Incidence of caffeine in serum of patients undergoing dipyridamole myocardial perfusion stress test by an intensive versus routine caffeine history screening..” The American Journal of Cardiology 105, no. 10 (May 2010): 1474–79. https://doi.org/10.1016/j.amjcard.2009.12.072.
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    • Patel, Manesh R., Peter J. Cawley, John F. Heitner, Igor Klem, Michele A. Parker, Wael A. Jaroudi, Trip J. Meine, et al. “Detection of myocardial damage in patients with sarcoidosis..” Circulation 120, no. 20 (November 2, 2009): 1969–77. https://doi.org/10.1161/CIRCULATIONAHA.109.851352.
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    • Kim, Han W., Igor Klem, Dipan J. Shah, Edwin Wu, Sheridan N. Meyers, Michele A. Parker, Anna Lisa Crowley, Robert O. Bonow, Robert M. Judd, and Raymond J. Kim. “Unrecognized non-Q-wave myocardial infarction: prevalence and prognostic significance in patients with suspected coronary disease..” Plos Medicine 6, no. 4 (April 21, 2009). https://doi.org/10.1371/journal.pmed.1000057.
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    • Klem, Igor, and Raymond J. Kim. “Assessment of microvascular injury after acute myocardial infarction: importance of the area at risk..” Nature Clinical Practice. Cardiovascular Medicine 5, no. 12 (December 2008): 756–57. https://doi.org/10.1038/ncpcardio1373.
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    • Klem, Igor, Simon Greulich, John F. Heitner, Han Kim, Holger Vogelsberg, Eva-Maria Kispert, Srivani R. Ambati, et al. “Value of cardiovascular magnetic resonance stress perfusion testing for the detection of coronary artery disease in women..” Jacc. Cardiovascular Imaging 1, no. 4 (July 2008): 436–45. https://doi.org/10.1016/j.jcmg.2008.03.010.
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    • Weinsaft, Jonathan W., Han W. Kim, Dipan J. Shah, Igor Klem, Anna Lisa Crowley, Rhoda Brosnan, Olga G. James, et al. “Detection of left ventricular thrombus by delayed-enhancement cardiovascular magnetic resonance prevalence and markers in patients with systolic dysfunction..” Journal of the American College of Cardiology 52, no. 2 (July 2008): 148–57. https://doi.org/10.1016/j.jacc.2008.03.041.
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    • Kim, Han W., Igor Klem, and Raymond J. Kim. “Detection of myocardial ischemia by stress perfusion cardiovascular magnetic resonance..” Magnetic Resonance Imaging Clinics of North America 15, no. 4 (November 2007): 527–vi. https://doi.org/10.1016/j.mric.2007.08.008.
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    • Weinsaft, J. W., I. Klem, and R. M. Judd. “MRI for the Assessment of Myocardial Viability.” Magnetic Resonance Imaging Clinics of North America 15, no. 4 (November 1, 2007): 505–25. https://doi.org/10.1016/j.mric.2007.08.007.
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    • Bruch, Christian, Igor Klem, Günter Breithardt, Thomas Wichter, and Rainer Gradaus. “Diagnostic usefulness and prognostic implications of the mitral E/E' ratio in patients with heart failure and severe secondary mitral regurgitation..” The American Journal of Cardiology 100, no. 5 (September 2007): 860–65. https://doi.org/10.1016/j.amjcard.2007.03.108.
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    • Kim, Han W., Igor Klem, and Raymond J. Kim. “Detection of myocardial ischemia by stress perfusion cardiovascular magnetic resonance..” Cardiology Clinics 25, no. 1 (February 2007): 57–vi. https://doi.org/10.1016/j.ccl.2007.02.002.
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    • Weinsaft, Jonathan W., Igor Klem, and Robert M. Judd. “MRI for the assessment of myocardial viability..” Cardiology Clinics 25, no. 1 (February 2007): 35–v. https://doi.org/10.1016/j.ccl.2007.02.001.
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    • Sievers, Burkhard, Michael D. Elliott, Lynne M. Hurwitz, Timothy S. E. Albert, Igor Klem, Wolfgang G. Rehwald, Michele A. Parker, Robert M. Judd, and Raymond J. Kim. “Rapid detection of myocardial infarction by subsecond, free-breathing delayed contrast-enhancement cardiovascular magnetic resonance..” Circulation 115, no. 2 (January 16, 2007): 236–44. https://doi.org/10.1161/CIRCULATIONAHA.106.635409.
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    • Mahrholdt, H., I. Klem, and U. Sechtem. “Cardiovascular MRI for detection of myocardial viability and ischaemia..” Heart (British Cardiac Society) 93, no. 1 (January 2007): 122–29. https://doi.org/10.1136/hrt.2005.071290.
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    • Klem, Igor, John F. Heitner, Dipan J. Shah, Michael H. Sketch, Victor Behar, Jonathan Weinsaft, Peter Cawley, et al. “Improved detection of coronary artery disease by stress perfusion cardiovascular magnetic resonance with the use of delayed enhancement infarction imaging..” Journal of the American College of Cardiology 47, no. 8 (April 2006): 1630–38. https://doi.org/10.1016/j.jacc.2005.10.074.
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    • Deluigi, Claudia C., Gabriel Meinhardt, Adrian Ursulescu, Igor Klem, Peter Fritz, and Heiko Mahrholdt. “Images in cardiovascular medicine. Noninvasive characterization of left atrial mass..” Circulation 113, no. 2 (January 2006): e19–20. https://doi.org/10.1161/circulationaha.105.536755.
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    • Heitner, John, Mat Lotfi, J Kevin Harrison, Christopher Cabell, Igor Klem, Lesan Banko, Raymond J. Kim, and Robert M. Califf. “Where's the flap?.” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 8, no. 3 (January 2006): 549–50. https://doi.org/10.1080/10976640600584785.
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    • Klem, Igor, Wolfgang G. Rehwald, John F. Heitner, Anja Wagner, Timothy Albert, Michele A. Parker, Enn-Ling Chen, Raymond J. Kim, and Robert M. Judd. “Noninvasive assessment of blood flow based on magnetic resonance global coherent free precession..” Circulation 111, no. 8 (March 2005): 1033–39. https://doi.org/10.1161/01.cir.0000156332.56894.22.
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    • Heitner, John F., Igor Klem, Karen Alexander, Louise Thomson, Trip J. Meine, Manesh R. Patel, Salman A. Haq, Dipan J. Shah, and Raymond J. Kim. “The case of the disappearing myxoma..” Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance 7, no. 5 (January 2005): 841–43. https://doi.org/10.1080/10976640500288156.
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    • Klem, I., and U. Sechtem. “Is coronary magnetic resonance angiography already a clinically useful diagnostic tool?.” Deutsche Medizinische Wochenschrift 129, no. 50 (December 10, 2004): 2733–38. https://doi.org/10.1055/s-2004-836104.
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    • Klem, I., and U. Sechtem. “[Is coronary magnetic resonance angiography already a clinically useful diagnostic tool?].” Deutsche Medizinische Wochenschrift (1946) 129, no. 50 (December 2004): 2733–38. https://doi.org/10.1055/s-2004-836104.
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    • Thompson, Richard B., Cyrus J. Parsa, Ewout J. van den Bos, Bryce H. Davis, Eric M. Toloza, Igor Klem, Donald D. Glower, and Doris A. Taylor. “Video-assisted thoracoscopic transplantation of myoblasts into the heart..” The Annals of Thoracic Surgery 78, no. 1 (July 2004): 303–7. https://doi.org/10.1016/s0003-4975(03)01215-3.
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    • Stöllberger, Claudia, Pavel Chnupa, Christine Abzieher, Thomas Länger, Josef Finsterer, Igor Klem, Elisabeth Hartl, Cornelius Wehinger, and Barbara Schneider. “Mortality and rate of stroke or embolism in atrial fibrillation during long-term follow-up in the embolism in left atrial thrombi (ELAT) study..” Clin Cardiol 27, no. 1 (January 2004): 40–46. https://doi.org/10.1002/clc.4960270111.
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    • Klem, Igor, Cornelius Wehinger, Barbara Schneider, Elisabeth Hartl, Josef Finsterer, and Claudia Stöllberger. “Diabetic atrial fibrillation patients: mortality and risk for stroke or embolism during a 10-year follow-up..” Diabetes/Metabolism Research and Reviews 19, no. 4 (July 2003): 320–28. https://doi.org/10.1002/dmrr.386.
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  • Book Sections

    • Khouri, M. G., I. Klem, C. Shenoy, J. Sulpher, and S. F. Dent. “Screening and monitoring for cardiotoxicity during cancer treatment.” In Cardio-Oncology: The Clinical Overlap of Cancer and Heart Disease, 43–80, 2017. https://doi.org/10.1007/978-3-319-43096-6_3.
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    • Jenista, E. R., D. C. Wendell, I. Klem, E. S. H. Ibrahim, and W. G. Rehwald. “Introduction to cardiovascular magnetic resonance imaging.” In Heart Mechanics: Magnetic Resonance Imaging-Mathematical Modeling, Pulse Sequences, and Image Analysis, 121–77, 2017. https://doi.org/10.1201/9781315119083.
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    • Grizzard, J. D., D. J. Shah, I. Klem, and R. J. Kim. “MR angiography of the lower extremity circulation with protocols.” In CT and MR Angiography of the Peripheral Circulation: Practical Approach with Clinical Protocols, 283–308, 2007.
    • Klem, I., J. D. Grizzard, D. J. Shah, R. M. Judd, and R. J. Kim. “MR angiography of the thoracic aorta with protocols.” In CT and MR Angiography of the Peripheral Circulation: Practical Approach with Clinical Protocols, 227–45, 2007.

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