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Allan Klein

Allan Klein, MD

Cardiac Imaging

Highlights

Age Groups Seen

  • Adult

Languages

  • French
  • English

Gender

Male

About Allan Klein

Biography

Allan Klein, MD, is the Director of Cardiovascular Imaging Research, Director of the Center for the Diagnosis and Treatment of Pericardial Diseases, and a staff cardiologist in the Section of Cardiovascular Imaging, the Robert and Suzanne Tomsich Department of Cardiovascular Medicine, at the Sydell and Arnold Miller Family Heart, Vascular & Thoracic Institute.  He is also the Course Director for Diastology and Contrast Echo & New Technologies Courses—currently his 15th annual course.  He is board-certified in internal medicine and cardiovascular medicine.   A Canadian by birth, Dr. Klein speaks fluent French and English. 

In addition to office visits, Dr. Klein also offers scheduled follow up virtual visits to select patients, through the Cleveland Clinic Express Care ® Online app. This platform allows patients to see their physician live, using their smartphone, tablet or computer.

Specialty Interests:  cardiovascular imaging (echocardiography, cardiac MR and computed tomography); pericardial diseases; restrictive cardiomyopathies; valvular heart disease; atrial fibrillation; and diastolic heart failure.

Number of Procedures Performed: Dr Klein reads well over 2000 echocardiograms per year and performs TEE and intraoperative echocardiogram for the interventional structural program. The pericardial center evaluates over 2100 patients per year of which Dr Klein sees the majority of patients. He is also heads the pericardiocentesis simulation program which trains the cardiology fellows and performs pericardiocentesis.

Success Rates: Cleveland Clinic is nationally and internationally renowned for the world’s best cardiovascular care. Success rates for specific procedures are available at: http://my.clevelandclinic.org/heart/about-heart-vascular-institute/treatment-outcomes.aspx

Education and Training: Dr. Klein received his medical degree from McGill University in Montreal, Quebec after completing an undergraduate degree in microbiology and immunology, graduating with honors.  While in medical school, he received several scholarships and graduated in the top 10 percent of his class.  Dr. Klein completed his clinical training at Mount Sinai Hospital in Toronto and the Royal Victoria Hospital in Montreal.  He completed a Cardiology Residency from the University of Ottawa Heart Institute and a Research Fellowship from the Mayo Clinic in Rochester, Minn.  He was appointed to Cleveland Clinic in 1989.

Research, Publications and Speaking:  In addition to his scholarships and academic achievements, Dr. Klein won the E.G.D. Murray Prize in Microbiology and Immunology as an undergraduate and has received multiple American Society of Echocardiography Outcomes Research Awards.

Dr. Klein has been course director and workshop leader at numerous medical specialty conferences focused on clinical trials, imaging modalities and clinical protocols, to name a few.  He currently serves as Professor of Medicine at the Cleveland Clinic Lerner College of Medicine of Case Western University.  Dr. Klein was a member of the Lerner College of Medicine Admissions Committee.
He has been the principal investigator for multicenter clinical trials in atrial fibrillation (ACUTE I, ACUTE II, and CLOTS); studies in diastolic function (ADEPT); valvular heart disease (Anorexigens and Valve Disease); and catheter ablation and pulmonary vein flow (ROTEA).  He has published key articles in such prestigious journals such as New England Journal of Medicine, Lancet, European Heart Journal, Circulation, and the Journal of the American College of Cardiology.  He chaired the Writing Committee for the document entitled “American Society of Echocardiography clinical recommendations for multimodality cardiovascular imaging of patients with pericardial disease:  Endorsed by the Society for Cardiovascular Magnetic Resonance and Society of Cardiovascular Computed Tomography.”

In June 2016, Dr. Klein was appointed President of the American Society of Echocardiography (ASE).. He is now immediate Past President.  He has served on the Board of Directors of the ASE and has been the Chair of the Industry Relations Committee and Chair of the Guidelines and Standards Committee.  Dr. Klein is also on the Writing Committee for the National Board of Echocardiography and served on the Board of Advisors of Cardiovascular Credentialing International.  He serves as a peer reviewer for more than 15 professional journals and grades abstracts for the American College of Cardiology, the ASE, the American Heart Association, and the European Society of Cardiology.

He has been an invited lecturer at many national and international symposia and conferences, speaking on topics related to his specialty interests.  Dr. Klein has authored or co-authored more than 280 peer-reviewed articles in professional journals, co-authored 40 chapters in medical textbooks and published 430 abstracts.  He is a co-editor of 2 books entitled "Diastology: Clinical Approach to Diastolic Heart Failure." as well as "Clinical Echocardiography Review: A Self-Assessment Tool."  Dr. Klein completed  a 2nd edition of the "Clinical Echocardiography Review:  A Self-Assessment Tool."  He has been the director and co-director of the Annual Diastology and Valve Summit courses for the last 20 years. He is also section editor on pericardial diseases for ACC.org and Current Cardiology reports.

About Dr. Klein: "I am a people person and enjoy the patient interaction. I am delighted in helping patients of all ages get better. With my clinical and imaging skills, I like to make a difference on a day to day basis."

Leisure time activities:  Dr. Klein is an avid sportsman and enjoys playing ice hockey, cycling, spinning, hiking and plays many sports. He enjoys reading and traveling around the world.

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Locations

  1. Cleveland Clinic Main Campus
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Education & Board Certifications

Education

  • Fellowship: Mayo Clinic, 1988
  • Residency: University of Ottawa Heart Institute, 1986
  • Residency: Royal Victoria Hospital, 1984
  • Internship: Mount Sinai Hospital, 1982
  • Medical Education: McGill University Faculty of Medicine, 1981
  • Undergraduate: McGill University, 1977

Board Certifications

  • Cardiovascular Disease: American Board of Internal Medicine, 1987
  • Internal Medicine: American Board of Internal Medicine, 1984

Professional Highlights

Past three years:

  • Notification “In the Spotlight” column of the Cleveland Clinic Professional Staff Update announced the recent appointment of Vice President of the ASE.  After a one-year term, president-elect and then president , 2014
  • Invited Visiting Professor at Mount Sinai Hospital for Anandi L. Sharma Visiting Professorship and Simon Dack, MD Memorial Lecture, Heart Failure with Preserved Ejection Fraction with live presentation at www.heart-talks.org, 2015
  • 13th Annual Tajik/Seward Lectureship, Cleveland Clinic HVI National Leadership  and Diseases Center and IPU Development, 2015
  • Section Editor for Pericardial Disease for ACC.org, 2016
  • Key Note Speaker:  “Constrictive Pericarditis in the 21st Century” at the Portuguese Congress of Cardiology, 2016
  • Elected President of the American Society of Echocardiography, 2017
  • Notification in the Cleveland Clinic “Weekly Scoop:  News from the Chief of Staff 5 Questions section on providing a one-stop-shop for patients with pericardial disease, 2017
    Physician’s Weekly article, “Key Concepts in Managing Complicated Pericarditis”  2017
  • Guest Co-Editor for Progress in Cardiovascular Disease 2017;59(4):325-26,  2017
  • Co-Editor of “Clinical Echocardiography Review:  A Self-Assessment Tool.” 2nd Edition.  Wolters Kluwer, 2017

Additional Training

Leading in health care business program, Cleveland Clinic

Awards

  • Fellowships: American College of Cardiology, Royal College of Physicians (Canada), American Society of Echocardiography, American Heart Association, European Society of Cardiology
  • Mentor for the winner of the Laennec Young Clinician Award at the American Heart Association Scientific Sessions,  2008
  • Guideline Chair, American Society of Echocardiography Clinical for Multimodality Cardiovascular Imaging of Patients with Pericardial Disease, 2013
  • Invited Visiting Professor at Mount Sinai Hospital for Anandi L. Sharma Visiting Professorship and Simon Dack, MD Memorial Lecture, Heart Failure with Preserved Ejection Fraction with live presentation at www.heart-talks.org, 2015
  • 13th Annual Tajik/Seward Lectureship, Cleveland Clinic HVI National Leadership and Diseases Center and IPU Development, 2015
  • Section Editor for Pericardial Disease for ACC.org., 2016
  • Elected President of the American Society of Echocardiography, 2017
  • Guest Co-Editor for Progress in Cardiovascular Disease 2017;59(4):325-26, 2017
  • Co-Editor of “Clinical Echocardiography Review:  A Self-Assessment Tool.” 2nd Edition.  Wolters Kluwer, 2017
  • Co-Editor of “Diastology:  Clinical Approach to Diastolic Heart Failure.”  Saunders Elsevier, Philadelphia, 2018

Professional Memberships

American Society of Echocardiography; American Heart Association; American College of Cardiology; Royal College of Physicians of Canada; Society of Cardiovascular Computed Tomography

Innovations & Patents

Dr. Klein has pioneered the use of transesophageal-guided cardioversion in patients with atrial fibrillation in his landmark paper in the New England Journal of Medicine published in 2001 and the European Heart Journal in 2006.

He directs the largest pericardial center in the world which evaluates complex patients with different pericardial diseases.

Research & Publications

See publications for this provider. (Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Cleveland Clinic physicians and scientists collaborate with industry to advance medical breakthroughs. These partnerships help commercialize discoveries for public benefit while maintaining scientific integrity. To ensure transparency and minimize potential bias, Cleveland Clinic reviews these relationships and publicly discloses when physicians/scientists receive significant compensation for consulting, serve in fiduciary roles, receive royalties, or hold equity interests related to their work. We manage potential conflicts through approval processes, annual reporting, and targeted management plans.

As of 2026-04-12, Dr. Klein has reported no financial relationship with industry that is applicable to this listing.

In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

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Video

Ratings & Reviews

4.8 out of 5

176 ratings, 22 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Explains
Courtesy Respect & Concern
Patient Rating of Doctor
Search reviews
    5 out of 5 stars
    Reviewed on 4/6/2026

    When the patient is a physician, there are some assumptions made, that preclude a deep discussion about Pro''s and cons of treatment plan being chosen

    5 out of 5 stars
    Reviewed on 4/6/2026

    Dr Klien and his interns are extremely knowledgeable the key is they will take the time to insure you understand whats being said in simpler terms

    5 out of 5 stars
    Reviewed on 4/6/2026

    Dr. Klein and his Residents were very polite and helpful. They were honest and strait forward. I left there feeling confident with their assessment of my condition.

    5 out of 5 stars
    Reviewed on 4/6/2026

    Dr was and is great!

    5 out of 5 stars
    Reviewed on 3/31/2026

    Dr. Klein is an excellent doctor. He is knowledgeable, kind, patient, and thorough. I have been seeing him as my cardiologist for 12 years now, and I count on him to manage my care in a way that is in my best interest.

    5 out of 5 stars
    Reviewed on 3/31/2026

    Doctor Alan Klein is an amazing Doctor, treat me with respect. Great human person,

    5 out of 5 stars
    Reviewed on 2/20/2026

    I especially appreciated Dr. Klein''s having me come back to review the MRI and echo results with him at the end of clinic.

    5 out of 5 stars
    Reviewed on 2/16/2026

    Dr.Klein and his Team are the best in the business. I recommend the Cleveland Clinic to everybody.

    5 out of 5 stars
    Reviewed on 1/27/2026

    Dr. Klein is knowledgeable regarding Pericarditis

    5 out of 5 stars
    Reviewed on 12/8/2025

    I consider Dr. Klein and his associates the very BEST in all of the above.

    5 out of 5 stars
    Reviewed on 9/12/2025

    Dr. Klein is a bit different, but that is not necessarily a bad thing. After some reflection on my visit, I came away with my knowledge that I did not have before my tests and meeting with him.

    5 out of 5 stars
    Reviewed on 8/27/2025

    I was initially seen by an internist who is training, they needed to review my case better prior to interaction. As a retired mid level provider, PA, I took charge of the interview and gave my history and current state of my case. They came in focused on getting me in the study and by the end of my case review they did not think I was a candidate.Dr Klein gave me my options, 4, and we came up with best and I will return in 6 months.

    4 out of 5 stars
    Reviewed on 8/19/2025

    Dr. Klein is very intelligent and appears excellent at interpreting test results. However, he should work on his empathy for his patient and be a little less clinical. Some of the test results can be a little daunting. He needs to remember that a patient could be upset with a test result And would benefit from a little more empathy.

    5 out of 5 stars
    Reviewed on 7/29/2025

    Both Dr. Klein and Dr. Gurram gave me confidence with their knowledge as they assessed my condition.

    5 out of 5 stars
    Reviewed on 7/29/2025

    Dr. Klein is very caring and explains everything in great detail. He is awesome!

    5 out of 5 stars
    Reviewed on 7/22/2025

    My medical experience to date has been both frustrating and traumatic. Having the opportunity to meet with Dr. Klein and his team was very reassuring, and I am confident that I am now receiving the best care. I was amazed at the level of personalized attention and overall professionalism. It felt great to have a team that also wanted answers to my medical issues.

    5 out of 5 stars
    Reviewed on 7/15/2025

    Dr Klein is without peer! Fantastic knowledge, care and is very familiar with me medical history

    5 out of 5 stars
    Reviewed on 6/9/2025

    I'm a raving fan! As mentioned earlier, Dr. Klein is an outstanding physician and person!

    5 out of 5 stars
    Reviewed on 6/9/2025

    As usual, Dr. Klein and his staff were extremely professional, pleasant, and informative. Dr. Klein spent quality time with us and made me feel taken care of. He's a wonderful physician and person!

    5 out of 5 stars
    Reviewed on 5/12/2025

    I couldn't be happier with Dr. Klein.

    5 out of 5 stars
    Reviewed on 5/5/2025

    High respect to the Dr and his team.

    5 out of 5 stars
    Reviewed on 4/25/2025

    Dr Klein never seems to be in a rush when explaining my situation and continued care.