Find a Top Internist Near Me in Irving, TX – Book an Appointment Instantly

 Dr. Ava Karimi is a Board-Certified Internal Medicine Physician with an MD/MBA, blending clinical excellence with strategic leadership to deliver patient-centered, value-based care. At Southwest Mind and Body, she specializes in medical weight loss programs and functional medicine, helping patients achieve sustainable, whole-body wellness through personalized, integrative care.

Her background spans complex case management, quality improvement, and community-based preventative medicine, with a strong focus on chronic disease management and reducing disparities in care. She also holds advanced training in aesthetic medicine, complementing her holistic approach to patient wellness.

Her MBA shapes how she leads: identifying systemic inefficiencies, building collaborative teams, and implementing solutions that elevate both patient outcomes and operational performance. She is recognized for teaching excellence and a deep commitment to mentoring the next generation of physicians.

 Dr. Ava Karimi is a Board-Certified Internal Medicine Physician with an MD/MBA, blending clinical excellence with strategic leadership to deliver patient-centered, value-based care. At Southwest Mind and Body, she specializes in medical weight loss programs and functional medicine, helping patients achieve sustainable, whole-body wellness through personalized, integrative care.

Her background spans complex case management, quality improvement, and community-based preventative medicine, with a strong focus on chronic disease management and reducing disparities in care. She also holds advanced training in aesthetic medicine, complementing her holistic approach to patient wellness.

Her MBA shapes how she leads: identifying systemic inefficiencies, building collaborative teams, and implementing solutions that elevate both patient outcomes and operational performance. She is recognized for teaching excellence and a deep commitment to mentoring the next generation of physicians.

Empower your health with Dr. Shari Spitzer. Dr. Spitzer is a board-certified family physician whose career has spanned more than 25 years guiding patients through recovery from cardiac surgery, coronary artery stenting, and post-myocardial infarctions using the power of exercise. As she observed how lifestyle changes positively impacted her patients' overall health, Dr. Spitzer decided to pursue the field of lifestyle medicine.

Now fully certified in both family medicine and lifestyle medicine, Dr. Spitzer is passionate about providing holistic healthcare and lending her expertise to Southwest Mind & Body Care in Dallas, TX. She leads a team of holistic wellness specialists using clinically proven therapeutic lifestyle interventions alongside natural medicine to treat and prevent chronic conditions. Dr. Spitzer is ready to help you make some positive changes to your health and wellness. She can help set goals and make life-changing choices.

When she’s not helping patients, Dr. Spitzer is exercising, cooking, traveling, and spending time with her family.

Board-certified osteopathic physician who specializes in Infectious Disease, Wound Care, Undersea (Dive) and Hyperbaric Medicine, and Natural Pain Management - with the use of Osteopathic Manipulative medicine and other modalities. He runs a multidisciplinary medical practice with primary interest in Natural Pain Relief

Schedule Appointment with Dr. Bhargava:

• Downtown Fort Worth/Medical District Office
• Fort Worth-Mira Vista
• Granbury
• Pecan Plantation

BOARD CERTIFICATIONS:

• Interventional Cardiology
• Internal Medicine
• Cardiovascular Disease
• Nuclear Cardiology
• Echocardiography

HOSPITALS:

• Heart and Vascular Surgical Center
• Medical City Fort Worth
• Medical City Arlington
• Methodist Mansfield
• Texas Health Azle
• Texas Health Fort Worth
• Texas Health Heart and Vascular Arlington
• Texas Health SW Fort Worth

EDUCATION:

• Residency, Internal Medicine: New York Medical College, Valhalla, NY.
• Fellowship, Cardiovascular Medicine: St. Vincent’s Catholic Medical Centers of New York, New York, NY.
• Fellowship, Interventional Cardiology: Albert Einstein Medical Center, Philadelphia, PA.
  

HONORS/AWARDS: 

• Fort Worth Top Doctors of 2026

Schedule Appointment with Dr. Kalaria:

• Downtown Fort Worth/Medical District Office
• Granbury

BOARD CERTIFICATIONS:

• Interventional Cardiology
• Cardiovascular Disease
• Nuclear Medicine/ Cardiology
• Vascular Medicine
• Endovascular Interventions

LANGUAGES:

• Hindi
• Gujarati

HOSPITALS:

• Heart and Vascular Surgical Center
• Medical City Fort Worth
• Medical City Arlington
• Methodist Mansfield
• Texas Health Azle
• Texas Health Fort Worth
• Texas Health Heart and Vascular Arlington
• Texas Health SW Fort Worth

EDUCATION:

• Internship & Residency, Internal Medicine: New Jersey Medical School
• Chief Medical Residency, Internal Medicine: New Jersey Medical School
• Fellowship, Cardiovascular Disease: University of Rochester, Rochester, NY.
• Fellowship, Interventional Cardiology: University of Rochester, New York, Rochester, NY.
• Fellowship, Vascular Medicine & Endovascular Interventions: Tufts University, Boston, MA.

PROFESSIONAL ASSOCIATIONS:

• American College of Cardiology, Fellow
  
  

HONORS/AWARDS:

• Fort Worths Top Doctors of 2026

BOARD CERTIFICATIONS:

• Interventional Cardiology
• General Cardiology

HOSPITALS:

• Medical City Plano
• Texas Health Allen
• Texas Health Frisco
• Texas Health Plano

EDUCATION:

• Fellowship, Interventional Cardiology: Baylor College of Medicine, Houston, TX
• Fellowship, Cardiovascular Disease: Baylor College of Medicine, Houston, TX
• Residency, Internal Medicine:  Baylor College of Medicine, Houston, TX
• Medical School, MD Degree:  Medical College of Virginia, Virginia Commonwealth, Richmond, Virginia 
• Graduate School, Masters of Science in Physiology Degree:  Medical College of Virginia, Virginia Commonwealth, Richmond, Virginia
• Undergraduate, Bachelors of Science in Biology Degree (Departmental Honors): Mary Washington College, Fredericksburg, Virginia 

PROCEDURAL SKILLS:

• Complex Coronary & Peripheral Interventions
• Heart Catheterizations
• Percutaneous Support Devices (Impella, IABP)
• Venous Reflux Disease & Ablation Therapy
• TAVR

HONORS/AWARDS:

• D Magazine Best Doctors in Collin County: 2026
  
  

PUBLICATIONS/MEDIA:

Publications:

• Brown WR, Levine, G. “Chest Pains and Angina”. In Levine, G, Cardiology Secrets (4th , pp. 110-116). Philadelphia, PA: Elsevier Saunders. (2014).

 

• Salloum FN, Abbate A, Houser J, Mudrick C, Roy S, Brown WR, Qureshi I, Prabhakar S and Kukreja R. “Sildenafil (Viagra) Attenuates Ischemic Cardiomyopathy and Improves Left Ventricular Function in Mice”. Am J Physiol Heart Circ Physiol. 2008 Mar;294(3):H1398-406. Epub. Jan 25, 2008.

 

• Majid M, Brown WR, Divakaran V, Virani S. “Pulmonic Valve Endocarditis, A Case Report.” Submitted to Texas Heart Inst Journal.

 

• Divakaran VG, Brown WR, Virani S. “Images in Echocardiography: A Freely Floating Saphenous Vein Graft.” Echocardiography. Vol 26. Aug, 2009.

 

• Brown WR. Assisted Drs. R. Kukreja and F. Salloum in the investigation of PDE-5 inhibitors and their role in cardio protection. “Chronic Inhibition of PDE-5 with Sildenafil (Viagra) Attenuates Ischemic Cardiomyopathy and Improves Left Ventricular Function in Mice”. 2007.

 

• Brown WR. Worked with Dr. T. Duane (Trauma Surgery) in the Medical College of Virginia Emergency Department. This research considered the value of pelvic/cervical spine films, and outcomes in various patient populations, including the obese and the diabetic patient. “The Role and Influence of Plain Films and Patient Demographics on Outcomes in the Trauma Bay." 2006.

 

• Brown WR. Worked with Dr. J. Feher to complete a thesis in physiology research. “Continuous Chemiluminescent Measurement of Superoxide in Intact Rat Hearts During Ischemia-Reperfusion.” 2002-2003.

 

• Brown WR. As a candidate for Biology departmental honors, worked with Dr. K. Loesser to complete a thesis in biological research. In May of 2001, presented research to the Virginia Academy of Science. The work subsequently appeared in the Academy’s publication. “Vitamin E: Efficacy of Gamma-Tocopherol vs. Alpha-Tocopherol in Atherosclerosis Prevention.” 2000-2001.

 

Poster Presentations:

• Oliver PA, Brown WR, Regan C, Stoltzfus J, Ornato JP. “Correlation Between Heart Rate in Pre-Hospital Patients In Atrial Fibrillation With Rapid Ventricular Response And Blood Serum Magnesium Levels”. AAEM meeting, Las Vegas, NV. Feb 2010.

 

• Salloum F, Abbate A, Brown WR, Hoke N, Kukreja RC. “Phosphodiesterase Inhibitors Reduce Myocardial Infarction, Apoptosis and Improve Post Ischemic Ventricular Function in Female Mice”. ACC meeting, Chicago, IL. March, 2008.

Get Medical Records From Dr. Singh's Previous Office

BOARD CERTIFICATIONS:

• Cardiovascular Disease
• Nuclear Cardiology
• Echocardiography
• Cardiac CT (pending)

LANGUAGES:

• English
• Hindi
• Punjabi

HOSPITALS:

• Baylor Scott & White Heart and Vascular Hospital - Dallas
• Baylor University Medical Center
• Hunt Regional Medical Center
• Texas Health Rockwall

EDUCATION:

• MBA, Graduated with Honors: University of Texas at Dallas Naveen Jindal School of Business, Dallas, TX
• Fellowship, Heart Failure/Transplant Hospitalist: Division of Cardiology, University of Washington Medical Center, Seattle, WA
• Fellowship, Cardiovascular Medicine: SUNY, Buffalo, NY
• Residency, Internal Medicine: University of Washington Medical Center, Seattle, WA
• Internship, Internal Medicine: University of Washington Medical Center, Seattle, WA
• Medical School, MD Degree: University of Washington School of Medicine, Seattle, WA
• Undergraduate: Bachelor of Science in Biology, with Honors, University of Puget Sound, Tacoma, WA

PROFESSIONAL APPOINTMENTS:

• Member: Quality and Safe Committee - Baylor Heart and Vascular Hospital (2014-present)
• Director: Hunt Regional Hospital Cardiac Cath Lab (2012-2014)
• Partner: Cardiology Consultants of Texas, Dallas, TX (2014-present)
• Member: Quality Assurance Committee - Buffalo Medical Group (2010-2012)
• Assistant Professor: University of Rochester Medical Center (2008-2011)

HONORS/AWARDS:

• Chief Cardiology Fellow - SUNY Buffalo Cardiology Fellowship (2006-2007)
• Nominated for Best Resident Teacher Award by medical students as residents (2002)
• Elected UW Alumni Representative for class 2001 - University of Washington School of Medicine (2001)
• Klea Bartirakas Award - Western Regional Medical Student Research Forum, Carmel, CA, Best Oral Presentation out of over 400 medical students from all over North America (2000)
• Best Oral Research Presentation, National Student Research Forum, Galveston, TX - In Epidemiology and Infectious Diseases for AIDS project in North India (1999)
• Elected Medical Student Association (MSA) Class Secretary (1999)

PROCEDURES:

• EKG
• Echocardiography
• Nuclear Stress Testing
• Arterial & Venous Extremity Dopplers / ABIs
• Arrhythmia Monitoring
• Coronary Calcium Scoring & Coronary CTA
• Cardiac MRI & MRI

SERVICES:

• Chest Pain
• Atrial Fibrillation
• Hypertension
• Congestive Heart Failure
• Peripheral Arterial Disease
• Stress Testing
• Coronary Artery Disease
• Weight Loss

BOARD CERTIFICATIONS:

• Interventional Cardiology
• Cardiovascular Disease
• Nuclear Cardiology
• Echocardiography
• Internal Medicine

HOSPITALS:

• Baylor Scott & White Medical Center - Lake Pointe
• Baylor Scott & White Medical Center - Plano
• Baylor Scott & White | The Heart Hospital - Denton
• Baylor Scott & White | The Heart Hospital - Plano
• Methodist Richardson Medical Center

EDUCATION:

• Fellowship, Interventional Cardiology:  Saint Vincent’s Hospital and Medical Centers, NY
• Fellowship, Cardiovascular Disease:  Saint Vincent’s Hospital and Medical Centers, NY
• Residency, Internal Medicine: Albert Einstein College of Medicine/Montefiore Medical Center, NY
• Medical School, MD Degree:  SUNY Stonybrook School of Medicine, NY
• Undergraduate, BS Degree:  CUNY City College, NY

HONORS/AWARDS:

• Saint Vincent’s Hospital and Medical Centers, New York (2007-2008)
• Saint Vincent’s Hospital and Medical Centers, New York (2004-2007)
• Albert Einstein College of Medicine/Montefiore Medical Center, New York (2001-2004)
• SUNY Stonybrook School of Medicine, New York (1994-2001)
• CUNY City College, New York (1994-2001)

PROFESSIONAL APPOINTMENTS:

• Medical Executive Committee, Member - Baylor Scott and White Medical Center at Garland, Texas (2012-2018)
• American Heart Association/Fellows Society of Greater New York, Fellow Liaison – St. Vincent's Hospital, NY (2005-2006)

PROFESSIONAL ASSOCIATIONS:

• The Society of Cardiovascular Angiography and Interventions, SCAI-Member (2007-present)
• North American Society of Cardiovascular Imaging, NASCI-Member (2006-present)
• American Society of Echocardiography, ASE-Member (2004-present)
• American Society of Nuclear Cardiology, ASNC-Affiliate Member (2004-present)
• American College of Cardiology, ACC-Member (2004-present)
• American Heart Association, AHA-Member (2004-present)
• American Medical Association, AMA-Member (2001-present)

PUBLICATIONS:

Research:

• Co-Investigator, "Vascular Supply of the Anterobasal Segment of the Left Ventricle, Retrospective review of 45 consecutive coronary angiography cases looking at the Anterobasal Segment contractility along with patency of the native Left Anterior Descending Artery and Left Internal Mammary Artery." (2005-2006)
• Co-Investigator, Worked with Dr.Thierry LeJemtel on the Brain Natriuretic Peptide (BNP) study. The purpose of the project was to determine if BNP levels could be used to determine the cardiovascular status of patients with Congestive Heart Failure (2002)

​

Presentations:

• Presentation: Pre-Op Clearance to the Anesthesia department at St.Vincent's Hospital and Medical Center. (2006)
• Electrocardiogram Interpretation for medical students and house staff at St. Vincent's Hospital and Medical Center/New York Medical College. (2004-2006)
• Over 100 presentations through out fellowship in case management conferences, cardiac catheterization conferences, M & M and cardiac surgical conferences, Journal club conferences, Cardiac Critical Care conferences, EP, Echo, EKG, CHF and Nuclear conferences

Schedule Appointment with Dr. Thamwiwat:

• HeartPlace HEB - Bedford Clinic
• Huguley /Burleson Clinic
  

BOARD CERTIFICATIONS:

• Interventional Cardiology
• Cardiovascular Disease
• Echocardiography
• Nuclear Cardiology
• Internal Medicine

HOSPITALS:

• Glen Rose Medical Center
• Medfinity Health HEB
• Texas Health HEB
• Texas Health Huguley Hospital Fort Worth South

EDUCATION:

• Fellowship, Interventional Cardiology: Baylor College of Medicine, Houston, Texas
• Fellowship, Cardiovascular Disease: Baylor College of Medicine, Houston, Texas 
• Residency, Internal Medicine:  Baylor College of Medicine, Houston, Texas 
• Medical School, MD Degree: Texas Tech University Health Sciences Center School of Medicine, Lubbock, Texas
• Undergraduate: The University of Texas at Arlington, Arlington, Texas 

PROFESSIONAL ASSOCIATIONS:

• Alpha Omega Alpha Honor Medical Society
• American College of Cardiology
• American Medical Association

HONORS/AWARDS:

• Ambulatory Care Achievement Award, Baylor College of Medicine (June 2014)
• Outstanding Student Award, Department of Internal Medicine, Texas Tech School of Medicine (2011)
• Alpha Omega Alpha Honor Medical Society (2010-present)
• University Scholar Award (2005-2006, 2006-2007)
• Honoree for College of Science Academic Excellence Reception (2003)
• The National Dean's List (2002-2007)
• Fort Worths Top Doctors of 2026

PUBLICATIONS/MEDIA:

• Thamwiwat, A, Sudhakar D, Paniagua D, and Denktas AE. Suspected coronary fat embolism after liposuction. Catheter Cardiovasc Interv. 2018;1-4.

 

• Thamwiwat A, Levine GN. Chapter 14: Chest pains and Angina. Cardiology Secrets, 5th Edition. Ed. Glenn N. Levine. Philadelphia: Elsevier, 2018.125-134. Print.

 

• Thamwiwat A, Mejia R, Nutman TB, Bates JT. (2014). Strongyloidiasis as a cause of chronic diarrhea, identified using next-generation Strongyloides stercoralis-specific immunoassays. Curr Trop Med Rep. 2014; 1:145-147.

 

• Hira RS, Thamwiwat A, Kar B. Tandem. Heart placement for cardiogenic shock in acute severe mitral regurgitation and right ventricular failure. Catheter Cardiovascular Interv. 2014;82(2):319-322.