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William K. Freeman, M.D.

  1. Cardiologist
  2. Echocardiographer
  3. Internist
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Publications

  1. Abbas MT, Baba Ali N, Farina JM, Mahmoud AK, Pereyra M, Scalia IG, Kamel MA, Barry T, Lester SJ, Cannan CR, Mital R, Wilansky S, Freeman WK, Chao CJ, Alsidawi S, Ayoub C, Arsanjani R. Role of Genetics in Diagnosis and Management of Hypertrophic Cardiomyopathy: A Glimpse into the Future. Biomedicines. 2024 Mar 19; 12 (3)
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  2. Chao CJ, Agasthi P, Girardo M, Barry T, Seri AR, Brown L, Wraith RE, Shanbhag A, Wang Y, Chen YC, Lester SJ, Alsidawi S, Freeman WK, Naqvi TZ, Eleid M, Fortuin D, Pollak P, El Sabbagh A, Sell-Dottin K, Majdalany D, Larsen C, Holmes DR, Oh JK, Appleton CP, Arsanjani R. Using Augmented Mean Arterial Pressure to Identify High Mortality Risk Patients With Moderate Aortic Stenosis. Mayo Clin Proc. 2023 Oct; 98 (10):1501-1514
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  3. Farina JM, Jaroszewski DE, Arsanjani R, Naqvi TZ, Aly MR, Freeman WK, Larsen CM, Marcotte F, Lester SJ, Chaliki HP, Narayanasamy H, Wilansky S, Appleton CP. Improved Right Ventricular Diastolic Function Assessed by Hepatic Vein Flow After Pectus Excavatum Repair. Ann Thorac Surg Short Rep. 2023 Jun; 1 (2):226-230 Epub 2023 Feb 27
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  4. Chao CJ, Agasthi P, Seri AR, Barry T, Shanbhag A, Wang Y, Eleid MF, Fortuin D, Sweeney JP, Pollak P, El Sabbagh A, Lester SJ, Freeman WK, Naqvi TZ, Holmes DR, Appleton CP, Arsanjani R. Transcatheter Aortic Valve Replacement Prognostication with Augmented Mean Arterial Pressure. J Cardiovasc Dev Dis. 2023 Apr 26; 10 (5)
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  5. Ashraf H, Freeman WK. Echocardiographic Assessment of Prosthetic Valves. Rev Cardiovasc Med. 2022 Oct; 23 (10):343 Epub 2022 Oct 11
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  6. Ashraf H, Agasthi P, Shanbhag A, Mehta RA, Rattanawong P, Allam M, Pujari SH, Mookadam F, Freeman WK, Srivathsan K, Sorajja D, Shen WK, Noseworthy PA, Yang EH, Masry HZE, Yao X, Mulpuru SK, Beohar N, Holmes DR Jr, Arsanjani R. Long-Term Clinical Outcomes of Underdosed Direct Oral Anticoagulants in Patients with Atrial Fibrillation and Atrial Flutter. Am J Med. 2021 Jun; 134(6):788-796. Epub 2021 Jan 12.
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  7. Ashraf H, Agasthi P, Siegel RJ, Pujari SH, Allam M, Shen WK, Srivathsan K, Sorajja D, Masry HE, Freeman WK, Mookadam F, Mulpuru S, Arsanjani R. Natural history and clinical significance of isolated complete left bundle branch block without associated structural heart disease. Anatol J Cardiol. 2021 Mar; 25(3):170-176.
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  8. Gumireddy SR, Chaliki HP, Cummings KW, Freeman WK. Systemic Lupus Erythematosus Presenting As Constrictive Pericarditis. Circ Cardiovasc Imaging 2020 Sep; 13 (9):e010254 Epub 2020 Sept 11
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  9. Rosenbaum AN, Bois MC, Zhang X, Santivasi WL, Freeman WK. Primary Malignant Pericardial Mesothelioma: A Clinical Case Series Illustrating the Necessity of a Multidisciplinary Approach. JACC Case Rep. 2019 Aug; 1(2):202-207. Epub 2019 Aug 21.
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  10. Alsidawi S, Nkomo VT, Dearani JA, Freeman WK. Rapid pannus formation: a rare cause of mitral stenosis following successful mitral valve repair. Eur Heart J Cardiovasc Imaging. 2016 Jan; 17: (1)8.
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  11. Liang JJ, Kurklinsky AK, Peterson TJ, Freeman WK, Oh JK. Post-procedural inverted takotsubo cardiomyopathy. Heart Lung Circ. 2013 Dec; 22: (12)1060-1.
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  12. Klarich KW, Attenhofer Jost CH, Binder J, Connolly HM, Scott CG, Freeman WK, Ackerman MJ, Nishimura RA, Tajik AJ, Ommen SR. Risk of death in long-term follow-up of patients with apical hypertrophic cardiomyopathy. Am J Cardiol. 2013 Jun 15; 111 (12):1784-91 Epub 2013 Mar 27
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  13. Abudiab MM, Odunukan OW, Freeman WK. 95-year-old woman with sudden-onset dyspnea. Mayo Clin Proc. 2012 Jun; 87 (6):603-6
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  14. Michelena HI, Abel MD, Suri RM, Freeman WK, Click RL, Sundt TM, Schaff HV, Enriquez-Sarano M. Intraoperative echocardiography in valvular heart disease: an evidence-based appraisal. Mayo Clin Proc. 2010 Jul; 85 (7):646-55
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  15. Topilsky Y, Tabatabaei N, Freeman WK, Saleh HK, Villarraga HR, Mulvagh SL. Images in cardiovascular medicine. Pendulum heart in congenital absence of the pericardium. Circulation. 2010 Mar 16; 121: (10)1272-4.
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  16. Fleischmann KE, Beckman JA, Buller CE, Calkins H, Fleisher LA, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Robb JF, Valentine RJ. American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines; American Society of Echocardiography; American Society of Nuclear Cardiology; Heart Rhythm Society; Society of Cardiovascular Anesthesiologists; Society for Cardiovascular Angiography and Interventions; Society for Vascular Medicine; Society for Vascular Surgery. J Am Coll Cardiol. 2009 Nov 24; 54(22):21012-28.
  17. Fleischmann KE, Beckman JA, Buller CE, Calkins H, Fleisher LA, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Robb JF, Valentine RJ. 2009 ACCF/AHA focused update on perioperative beta blockade: a report of the American college of cardiology foundation/American heart association task force on practice guidelines. Circulation. 2009 Nov 24; 120(21):2123-51. Epub 2009 Nov 02.
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  18. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF. 2009 ACCF/AHA focused update on perioperative beta blockade incorporated into the ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: a report of the American college of cardiology foundation/American heart association task force on practice guidelines. Circulation. 2009 Nov 24; 120(21):e169-276. Epub 2009 Nov 02.
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  19. American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines, American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine, Society for Vascular Surgery, Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF. 2009 ACCF/AHA focused update on perioperative beta blockade incorporated into the ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery. J Am Coll Cardiol. 2009 Nov 24; 54(22):e13-e118.
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  20. Freeman WK, Gibbons RJ. Perioperative cardiovascular assessment of patients undergoing noncardiac surgery. Mayo Clin Proc. 2009; 84 (1):79-90
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  21. Grewal J, Mankad S, Freeman WK, Click RL, Suri RM, Abel MD, Oh JK, Pellikka PA, Nesbitt GC, Syed I, Mulvagh SL, Miller FA. Real-time three-dimensional transesophageal echocardiography in the intraoperative assessment of mitral valve disease. J Am Soc Echocardiogr. 2009 Jan; 22 (1):34-41
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  22. Russo A, Grigioni F, Avierinos JF, Freeman WK, Suri R, Michelena H, Brown R, Sundt TM, Enriquez-Sarano M. Thromboembolic complications after surgical correction of mitral regurgitation incidence, predictors, and clinical implications. J Am Coll Cardiol. 2008 Mar 25; 51 (12):1203-11
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  23. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof E, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Buller CE, Creager MA, Ettinger SM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Oranato JP, Page RL, Riegel B, Tarkington LG, Yancy CW. ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: executive summary: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery). Anesthes Analg. 2008 Mar; 106(3):685-712.
  24. Reising S, Safford R, Castello R, Bosworth V, Freeman W, Kusumoto F. A stroke of bad luck: left ventricular pacemaker malposition. J Am Soc Echocardiogr. 2007 Nov; 20: (11)1316.e1-3.
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  25. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof E, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Buller CE, Creager MA, Ettinger SM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Ornato JP, Page RL, Riegel B, Tarkington LG, Yancy CW, ACC/AHA TASK FORCE MEMBERS. ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): Developed in Collaboration With the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesth Circulation. 2007 Oct 23; 116 (17):1971-96 Epub 2007 Sept 27
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  26. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Buller CE, Creager MA, Ettings SM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Ornato JP, Page RL, Riegel B, Tarkington LG, Yancy CW. ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery) Developed in Collaboration with the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anest J Am Coll Cardiol. 2007 Oct 23; 50(17):1707-32.
  27. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Buller CE, Creager MA, Ettinger SM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Ornato JP, Page RL, Riegel B, Tarkington LG, Yancy CW. ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery) developed in collaboration with the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Socie J Am Coll Cardiol. 2007 Oct 23; 50(17):e159-241.
  28. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof E, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Buller CE, Creager MA, Ettinger SM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Ornato JP, Page RL, Tarkington LG, Yancy CW. ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): developed in collaboration with the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Soci Circulation. 2007 Oct 23; 116(17):e418-99.
  29. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF. ACC/AHA 2006 guideline update on perioperative cardiovascular evaluation for noncardiac surgery: focused update on perioperative beta-blocker therapy--a report of the American College of Cardiology/American Heart Association Task Force on Perioperative Cardiovascular Evaluation for Noncardiac Surgery. Anesth Analg. 2007 Jan; 104(1):15-26.
  30. Powell BD, Redfield MM, Bybee KA, Freeman WK, Rihal CS. Association of obesity with left ventricular remodeling and diastolic dysfunction in patients without coronary artery disease. Am J Cardiol. 2006 Jul 1; 98 (1):116-20 Epub 2006 May 06
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  31. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof E, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, HUnt SA, Lytle BW, Nishimura R, Page RL, Riegel B. ACC/AHA 2006 guideline update on perioperative cardiovascular evaluation for noncardiac surgery: focused update on perioperative beta-blocker therapy: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Update the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery) developed in collaboration with the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, J Am Coll Cardiol 6. 2006 Jun 6; 47: (11)2343-55.
  32. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof E, Fleischmann KE, Freeman WK, Froehlich JB, Kasper EK, Kersten JR, Riegel B, Robb JF, Smith SC Jr, Jacobs AK, Adams CD, Anderson JL, Antman EM, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Lytle BW, Nishimura R, Page RL, Riegel B. ACC/AHA 2006 guideline update on perioperative cardiovascular evaluation for noncardiac surgery: focused update on perioperative beta-blocker therapy: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines Circulation 6. 2006 Jun 6; 113: (22)2662-74.
  33. Modesto KM, Moller JE, Freeman WK, Shub C, Bailey KR, Pellikka PA. Safety of exercise stress testing in patients with abnormal concentrations of serum potassium. Am J Cardiol. 2006 Apr 15; 97(8):1247-9. Epub 2006 Mar 03.
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  34. McCully RB, Roger VL, Ommen SR, Mahoney DW, Burger KN, Freeman WK, Pellikka PA. Outcomes of patients with reduced exercise capacity at time of exercise echocardiography. Mayo Clin Proc. 2004 Jun; 79: (6)750-7.
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  35. Ommen SR, Park SH, Click RL, Freeman WK, Schaff HV, Tajik AJ. Impact of intraoperative transesophageal echocardiography in the surgical management of hypertrophic cardiomyopathy. Am J Cardiol. 2002 Nov 1; 90 (9):1022-4
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  36. Tsang TS, Enriquez-Sarano M, Freeman WK, Barnes ME, Sinak LJ, Gersh BJ, Bailey KR, Seward JB. Consecutive 1127 therapeutic echocardiographically guided pericardiocenteses: clinical profile, practice patterns, and outcomes spanning 21 years. Mayo Clin Proc. 2002 May; 77 (5):429-36
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  37. Cantwell RV, Aviles RJ, Bjornsson J, Wright RS, Freeman WK, Oh JK, Hoyer JD, Markovic S, Jaffe AS. Cardiac amyloidosis presenting with elevations of cardiac troponin I and angina pectoris. Clin Cardiol. 2002 Jan; 25(1):33-7.
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  38. Hassan I, Zehr KJ, Freeman WK. A case of asymptomatic thoracic aorta mural thrombi. Ann Thorac Surg. 2001 Nov; 72 (5):1735-7
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  39. Nowrangi SK, Connolly HM, Freeman WK, Click RL. Impact of intraoperative transesophageal echocardiography among patients undergoing aortic valve replacement for aortic stenosis. J Am Soc Echocardiogr. 2001 Sep; 14 (9):863-6
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  40. Juracan EM, Freeman WK, Pellikka PA. Early deterioration followed by improvement in contractility during dobutamine stress echocardiography: An unusual response. J Am Soc Echocardiogr. 1999 Dec; 12 (12):1110-3
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  41. Enriquez-Sarano M, Freeman WK, Tribouilloy CM, Orszulak TA, Khandheria BK, Seward JB, Bailey KR, Tajik AJ. Functional anatomy of mitral regurgitation: accuracy and outcome implications of transesophageal echocardiography. J Am Coll Cardiol. 1999 Oct; 34 (4):1129-36
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  42. Tsang TS, Barnes ME, Hayes SN, Freeman WK, Dearani JA, Butler SL, Seward JB. Clinical and echocardiographic characteristics of significant pericardial effusions following cardiothoracic surgery and outcomes of echo-guided pericardiocentesis for management: Mayo Clinic experience, 1979-1998. Chest. 1999 Aug; 116 (2):322-31
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  43. Agmon Y, Freeman WK, Oh JK, Seward JB. Diastolic mitral regurgitation. Circulation. 1999 Jun 1; 99 (21):e13
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  44. Tsang TS, Freeman WK, Barnes ME, Reeder GS, Packer DL, Seward JB. Rescue echocardiographically guided pericardiocentesis for cardiac perforation complicating catheter-based procedures. The Mayo Clinic experience. J Am Coll Cardiol. 1998 Nov; 32 (5):1345-50
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  45. Tsang TS, El-Najdawi EK, Seward JB, Hagler DJ, Freeman WK, O'Leary PW. Percutaneous echocardiographically guided pericardiocentesis in pediatric patients: evaluation of safety and efficacy. J Am Soc Echocardiogr. 1998 Nov; 11 (11):1072-7
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  46. Yeo TC, Freeman WK, Schaff HV, Orszulak TA. Mechanisms of hemolysis after mitral valve repair: assessment by serial echocardiography. J Am Coll Cardiol. 1998 Sep; 32 (3):717-23
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  47. Tsang TS, Freeman WK, Sinak LJ, Seward JB. Echocardiographically guided pericardiocentesis: evolution and state-of-the-art technique. Mayo Clin Proc. 1998 Jul; 73 (7):647-52
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  48. Yeo TC, Miller FA Jr, Oh JK, Freeman WK. Retained left atrial catheter: an unusual cardiac source of embolism identified by transesophageal echocardiography. J Am Soc Echocardiogr. 1998 Jan; 11 (1):66-70
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  49. Tsang TS, Freeman WK, Miller FA Jr, Seward JB. Teardrop sign: echocardiographic features in cardiac herniation. J Am Soc Echocardiogr. 1998 Jan; 11 (1):74-6
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  50. Nir A, Tajik AJ, Freeman WK, Seward JB, Offord KP, Edwards WD, Mair DD, Gomez MR. Tuberous sclerosis and cardiac rhabdomyoma. Am J Cardiol. 1995 Aug 15; 76 (5):419-21
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  51. Harrity PJ, Tazelaar HD, Edwards WD, Orszulak TA, Freeman WK. Intracardiac varices of the right atrium: a case report and review of the literature. Int J Cardiol. 1995 Feb; 48 (2):177-81
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  52. Higano ST, Harris WO, Tajik AJ, Freeman WK, Joyce JW, Hayes DL. Calcified obstructive disease of the descending thoracic aorta. Mayo Clin Proc. 1994 Apr; 69 (4):371-2
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  53. Kishon Y, Iqbal A, Oh JK, Gersh BJ, Freeman WK, Seward JB, Tajik AJ. Evolution of echocardiographic modalities in detection of postmyocardial infarction ventricular septal defect and papillary muscle rupture: study of 62 patients. Am Heart J. 1993 Sep; 126 (3 Pt 1):667-75
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  54. Seward JB, Khandheria BK, Freeman WK, Oh JK, Enriquez-Sarano M, Miller FA, Edwards WD, Tajik AJ. Multiplane transesophageal echocardiography: image orientation, examination technique, anatomic correlations, and clinical applications. Mayo Clin Proc. 1993 Jun; 68 (6):523-51
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  55. Freeman WK, Schaff HV, Khandheria BK, Oh JK, Orszulak TA, Abel MD, Seward JB, Tajik AJ. Intraoperative evaluation of mitral valve regurgitation and repair by transesophageal echocardiography: incidence and significance of systolic anterior motion. J Am Coll Cardiol. 1992 Sep; 20 (3):599-609
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  56. Seward JB, Khandheria BK, Oh JK, Freeman WK, Tajik AJ. Critical appraisal of transesophageal echocardiography: limitations, pitfalls, and complications. J Am Soc Echocardiogr. 1992 May-Jun; 5 (3):288-305
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  57. Miller FA Jr, Khandheria BK, Freeman WK, Seward JB, Tajik AJ. Mitral prosthesis effective orifice area by a new method using continuity of flow between left atrium and prosthesis. J Am Coll Cardiol. 1992 Mar 1; 19(Suppl A):214A.
  58. Blackshear JL, Safford RE, Lane GE, Freeman WK, Schaff HV. Unruptured noncoronary sinus of Valsalva aneurysm: preoperative characterization by transesophageal echocardiography. J Am Soc Echocardiogr. 1991 Sep-Oct; 4 (5):485-90
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  59. Freeman WK, Schaff HV, O'Brien PC, Orszulak TA, Naessens JM, Tajik AJ. Cardiac surgery in the octogenarian: perioperative outcome and clinical follow-up. J Am Coll Cardiol. 1991 Jul; 18 (1):29-35
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  60. Khandheria BK, Seward JB, Oh JK, Freeman WK, Nichols BA, Sinak LJ, Miller FA Jr, Tajik AJ. Value and limitations of transesophageal echocardiography in assessment of mitral valve prostheses. Circulation. 1991 Jun; 83 (6):1956-68
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  61. Oh JK, Seward JB, Khandheria BK, Gersh BJ, McGregor CG, Freeman WK, Sinak LJ, Tajik AJ. Transesophageal echocardiography in critically ill patients. Am J Cardiol. 1990 Dec 15; 66 (20):1492-5
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  62. Khandheria BK, Seward JB, Oh JK, Freeman WK, Tajik AJ. Is biplane transesophageal echocardiography superior to monoplane in the assessment of atrial septum? Circulation. 1990 Oct; 82(Suppl III):4.
  63. Freeman WK, Schaff HV, Orszulak TA, Tajik AJ. Ultrasonic aortic valve decalcification: serial Doppler echocardiographic follow-up. J Am Coll Cardiol. 1990 Sep; 16 (3):623-30
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  64. Seward JB, Khandheria BK, Edwards WD, Oh JK, Freeman WK, Tajik AJ. Biplanar transesophageal echocardiography: anatomic correlations, image orientation, and clinical applications. Mayo Clin Proc. 1990 Sep; 65 (9):1193-213
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  65. Johnston SR, Freeman WK, Schaff HV, Tajik AJ. Severe tricuspid regurgitation after mitral valve repair: diagnosis by intraoperative transesophageal echocardiography. J Am Soc Echocardiogr. 1990 Sep-Oct; 3 (5):416-9
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  66. Shub C, Tajik AJ, Holmes DR Jr, Holmes DR Jr, Reeder GS, Freeman WK, Ilstrup DM, Smith HC. Doppler echocardiography in aortic stenosis: feasibility and clinical impact. Int J Cardiol. 1990 Jul; 28 (1):57-66
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  67. Freeman WK, Gersh BJ, Gloviczki P. Abdominal aortic aneurysm and coronary artery disease: frequent companions, but an uneasy relationship. J Vasc Surg. 1990 Jul; 12(1):73-7.
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  68. Hayes SN, Freeman WK, Gersh BJ. Low pressure cardiac tamponade: diagnosis facilitated by Doppler echocardiography. Br Heart J. 1990 Feb; 63 (2):136-40
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  69. Freeman WK, Gibbons RJ, Shub C. Preoperative assessment of cardiac patients undergoing noncardiac surgical procedures. Mayo Clin Proc. 1989 Sep; 64 (9):1105-17
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  70. Freeman WK, Gibbons RJ, Bove AA. Left main coronary artery disease: radionuclide angiographic function versus anatomic correlates with visual and quantitative angiographic methods. Int J Cardiol. 1989 Mar; 22 (3):339-46
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  71. Oh JK, Khandheria BK, Seward JB, Freeman WK, Sinak LJ, Tajik AJ. Trans-esophageal color flow imaging. Echocardiography. 1989; 5:407-16.
  72. Oh JK, Khandheria BK, Seward JB, Freeman WK, Sinak LJ, Tajik AJ. Transesophageal color flow imaging. Echocardiography. 1988 Nov; 5:407-416.
  73. Seward JB, Khandheria BK, Oh JK, Abel MD, Hughes RW Jr, Edwards WD, Nichols BA, Freeman WK, Tajik AJ. Transesophageal echocardiography: technique, anatomic correlations, implementation, and clinical applications. Mayo Clin Proc. 1988 Jul; 63 (7):649-80
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  74. Freeman WK, Miller FA Jr, Oh JK, Seward JB, Tajik AJ. Postinfarct ventricular septal rupture: diagnosis and management facilitated by two-dimensional and Doppler echocardiography. Echocardiology. 1987 Jan; 4:75-81.
  75. Freeman WK, Rorie DK, Tyce GM. Effects of 5-hydroxytryptamine on neuroeffector junction in human pulmonary artery. Journal of Applied Physiology: Respiratory, Environmental & Exercise Physiology. 1981 Sep; 51(3):693-8.
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