Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Mark Robertshaw, MD, is a board-certified pulmonologist and critical care medicine specialist proudly serving patients in Plano, Texas. He joined Southwest Pulmonary Associates in 2023, bringing with him a wealth of clinical experience and a compassionate, patient-centered approach to care.
Dr. Robertshaw completed his fellowship in Pulmonary and Critical Care Medicine at UT Southwestern Medical Center in Dallas, Texas, where he was honored to serve as Chief Fellow during the 2022–2023 academic year. He completed his residency training at Duke University Hospital in Durham, North Carolina, and earned his medical degree from the University of Missouri in Columbia. His academic journey began at the University of Notre Dame in South Bend, Indiana, where he received his Bachelor of Science and developed a lifelong passion for Fighting Irish football.
Board certified by the American Board of Internal Medicine in both Pulmonary Medicine and Critical Care Medicine, Dr. Robertshaw is committed to helping patients manage a wide range of respiratory conditions with leading-edge diagnostic tools and individualized treatment plans. His dedication to community service has been recognized with prestigious honors, including the President’s Volunteer Service Award and the Congressional Award, both received in 2013.
Outside the clinic, Dr. Robertshaw enjoys spending quality time with his wife and daughter, golfing, and cheering on his alma mater during college football season. He looks forward to building long-lasting relationships with his patients and their families throughout the Plano community.
Rebecca Doebele, MD, is a board-certified pulmonologist and critical care specialist who has been providing expert respiratory care to patients in Dallas, Texas, since joining Southwest Pulmonary Associates in 2008. Known for her compassionate approach and clinical excellence, Dr. Doebele treats a wide range of pulmonary conditions, including asthma, COPD, interstitial lung disease, and critical illnesses requiring intensive care.
Dr. Doebele earned her Bachelor of Science in Genetics from Texas A&M University in College Station before completing her Doctor of Medicine at the University of Texas Southwestern Medical School in Dallas. She remained at UT Southwestern for her residency in Internal Medicine, then pursued advanced fellowship training in Pulmonary and Critical Care Medicine at the University of Colorado Health Science Center.
Board-certified in both Pulmonary Medicine and Critical Care Medicine by the American Board of Internal Medicine, Dr. Doebele has been repeatedly recognized for her clinical skill and dedication to patient care. She was named a Super Doctors Rising Star in 2012 and has earned the prestigious Texas Super Doctors distinction annually from 2013 to the present. Additionally, she received the “Physician All-Star” award from the nursing and administrative staff at Texas Health Presbyterian Hospital of Dallas, a testament to her leadership and collaboration in the hospital setting. Dr. Doebele has been recognized as one of D Magazine’s best doctors in 2021, 2023, and 2024. She also serves as the ICU Medical Director at Texas Health Dallas.
Outside of medicine, Dr. Doebele enjoys traveling and spending time with her husband and their three children. She is proud to serve the Dallas community and is committed to helping her patients breathe easier and live healthier lives.
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.
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
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)
Ramanath VS, Thompson CA. STEMI: Adjunctive Therapies for Primary PCI In: The SCAI Interventional Cardiology Board Review. Lippincott Williams and Wilkins. 2013.
Ramanath VS, Thompson CA. STEMI: Reperfusion (Primary PCI vs Thrombolysis) In: The SCAI Interventional Cardiology Board Review. Lippincott Williams and Wilkins. 2013.
Ramanath VS, Thompson CA. Guidewires and Balloons - the Primer In: Textbook of Cardiovascular Intervention. Springer. 2013.
Ramanath VS, Eagle KA. Guideline adherence and outcomes in coronary heart disease and heart failure In: UpToDate, Rose, BD (Ed), UpToDate, Waltham, MA, 2007, 2008, 2009, 2010, 2011, 2012.
Ramanath VS, Oh JK, Sundt III TM, Eagle KA. Acute aortic syndromes and thoracic aortic aneurysm In: Cardiovascular Diseases: Diagnosis and Management, Gerber TC, Asirvatham SJ, Lavie CJ, Oh JK (Ed), Mayo Foundation for Medical Education and Research, Rochester, MN, 2010.
Scientific Publications:
Ramanath VS, Thompson CA. Coronary chronic total occlusion recanalization - current techniques and approaches. Interventional Cardiology Review. 2013;8(1):41-5.
Zlotnick DM, Ramanath VS, Brown JR, Kaplan AV. Classification and treatment of coronary artery bifurcation lesions: putting the Medina classification to the test. Cardiovasc Revasc Med2012 Jun 13 (Epub).
Ramanath VS, Szot CR, Andrus BW, Kaplan AV, Robb JF. Takotsubo cardiomyopathy following administration of midodrine. Tex Heart Inst J. 2012;39(1):158-159.
Robert AM, Brown JR, Sidhu MS, Ramanath VS, DeVries JT, Jayne JE, Hettleman BD, Friedman BJ, Niles NW II, Kaplan AV, Malenka DJ, Robb JF, Thompson CA. The evaluation of creatinine clearance, estimated glomerular filtration rate, and serum creatinine in predicting contrast-induced acute kidney injury among patients undergoing percutaneous coronary intervention. Cardiovasc Revasc Med. 2012;109(1):122-7.
Suzuki R, Isselbacher EM, Nienaber CA, Pyeritz RE, Eagle KA, Tsai TT, Cooper JV, Januzzi JL, Braverman AC, Montgomery DG, Fattori R, Pape L, Harris KM, Booher A, Oh JK, Peterson M, Ramanath VS, Froehlich JB. Type-selective benefits of medications in treatment of acute aortic dissection (from the International Registry of Acute Aortic Dissection [IRAD]). Am J Cardiol. 2012;109(1):122-7.
Ramanath VS, Eagle KA, Nienaber CA, Isselbacher EM, Froehlich JB, Cooper JV, Gu X, Evangelista A, Meinhardt G, Beckman J, Myrmel T, Pape L, Pyeritz RE, Hirsch AT, Bossone E. The role of preoperative coronary angiography in the setting of type A acute aortic dissection: Insights from the International Registry of Acute Aortic Dissection. Am Heart J. 2011;161(4):790-796.e1.
Booher AM, Isselbacher EM, Nienaber CA, Froehlich JB, Trimarchi S, Cooper JV, Demertzis S, Ramanath VS, Januzzi JL, Harris KM, O'Gara PT, Sundt III TM, Pyeritz RE, Eagle KA. Ascending thoracic aorta dimension and outcomes in acute type B dissection (from the International Registry of Acute Aortic Dissection [IRAD]). Am J Cardiol. 2011;107(2):315-320.
Ramanath VS, Brown JR, Malenka DJ, DeVries JT, Sidhu MS, Robb JF, Jayne JE, Hettleman BD, Friedman BJ, Niles NW II, Kaplan AV, Thompson CA. Outcomes of diabetics receiving bare-metal stents versus drug-eluting stents. Catheter Cardiovasc Interv. 2010;76(4):473-81.
Olomu AB, Grzybowski M, Ramanath VS, Rogers AM, Motyka-Vautaw B, Chen B, Roychoudhury C, Jackson EA, Eagle KA. Evidence of disparity in the application of quality improvement efforts for the treatment of acute myocardial infarction: the American College of Cardiology's Guidelines Applied in Practice initiative in Michigan. Am Heart J. 2010 Mar;159(3):377-384.
Ramanath VS, Armstrong DF, Grzybowski M, Rahnama-Mohagdam S, Tamhane UU, Gordon K, Froehlich JB, Eagle KA, Jackson EA. Discharge medication use and outcomes in acute coronary syndrome patients with non-obstructive coronary artery disease. Clin Cardiol. 2010 Jan;33(1):36-41.
Ramanath VS, Oh JK, Sundt III TM, Eagle KA. Acute aortic syndromes and thoracic aortic aneurysm. Mayo Clinic Proc. 2009 May;84(5):465-481.
Motivala AA, Tamhane U, Ramanath VS, Saab F, Montgomery DG, Fang J, Kline-Rogers E, May N, Ng G, Froehlich J, Gurm H, Eagle KA. A prior myocardial infarction: how does it affect management and outcomes in recurrent acute coronary syndromes? Clin Cardiol. 2008 Dec;31(12):590-596.
Rogers AM, Ramanath VS, Grzybowski M, Riba AL, Jani SM, Metha R, De Franco AC, Parrish R, Skorcz S, Baker PL, Faul J, Chen B, Roychoudhury C, Elma MAC, Mitchell KR, Froehlich JB, Montoye C, Eagle KA. The association between guideline-based treatment instructions at the point of discharge and lower 1-year mortality in Medicare patients after acute myocardial infarction: The American College of Cardiology's Guidelines Applied in Practice (GAP) initiative in Michigan. Am Heart J. 2007 Sept;154(3): 461-469.
Ramanath VS, Eagle KA. Evidence-based medical therapy of patients with acute coronary syndromes. Am J Cardiovasc Drugs. 2007;7(2): 95-116.
Vasaiwala S, Nolan E, Ramanath VS, Fang J, Kearly G, Van Riper S, Kline-Rogers E, Otten R, Cody RA, Eagle KA. A quality guarantee in acute coronary syndromes: The ACC's GAP program taken real-time. Am Heart J. 2007 Jan;153(1):16-21.
Ramanath VS, Lacomis JM, Katz WE. Diagnosis of pulmonary embolism by acute right heart morphologic and hemodynamic changes observed during exercise stress echocardiography. J Am Soc Echocardiogr. 2004 Sep;17(9):1005-8.
Fazel PA, Peterman MA, Schussler JM. Three-Year Outcomes and Cost Analysis in Patients Receiving 64-Slice Computed Tomographic Coronary Angiography for Chest Pain. American Journal of Cardiology 2009:104:498-500.
Peterman MA, Hamman BL, Schussler JM. 64-Slice CT angiography of saphenous vein graft anastomoses fashioned with interrupted nitinol clips. Annals of Thoracic Surgery 2007:83:1204.
Peterman MA, Donsky MS, Matter GJ, Roberts WC. A Starr-Edwards model 6120 mechanical prosthesis in the mitral valve position for 38 years. American Journal of Cardiology 2006:97:756-758.
Peterman MA, Farooq H, Roberts WC. Facts and principles learned at the 31st Annual Williamsburg Conference on Heart Disease. Baylor University Medical Center Proceedings 2004:17:106-115.
Peterman MA, Roberts WC. Syndrome of protein C deficiency and anterior wall acute myocardial infarction at a young age from a single coronary occlusion with otherwise normal coronary arteries. American Journal of Cardiology 2003:92
123
Welcome
Our mission here at the Natural Balance Clinic is to introduce the most natural nutrition and supplements to balance the body without using medication. We believe that medication, for the most part, is not the answer for common illnesses. We believe that most diseases and illnesses happen because of the lack of healing nutrients in common food choices. We believe that medications are temporary relief of more in depth medical problems that need serious nutritional attention. We believe that healing should start from inside the body and unless we begin from inside the body, we never can treat outside symptoms because outside body pain and symptoms arise from serious internal imbalance which arise from toxins that we constantly abuse our body with, calling them "food".
Mihaela Perijoc, MD, MHA, is an eminent board-certified internal medicine physician and functional medicine specialist providing exceptional health care for patients at North Texas Internal Medicine Specialists in Plano, Texas. Dr. Perijoc has outstanding medical skills that she combines with a passion for providing the highest standard of care for her patients.
Dr. Perijoc began her career by obtaining her medical degree from the Institute of Medicine and Pharmacy (Carol Davila), Bucharest, Romania. After qualifying as a doctor, she undertook her residency in internal medicine at St. Vincent Indianapolis in Indiana. Dr. Perijoc remained at St. Vincent to complete a procedural fellowship in internal medicine.
Dr. Perijoc went on to gain valuable experience in high-profile positions at hospitals and health care institutions across Texas, honing her already considerable skills and becoming a leading advocate for raising quality standards. She developed a new model of patient care that emphasizes continuity of care and places the patient at the heart of everything she and her staff do. Dr. Perijoc continually adds to her skill set and is currently pursuing a Master in Functional Medicine degree with George Washington University in Washington, D.C.
Dr. Perijoc is a distinguished figure in her field, undertaking teaching roles at several Texas universities and holding membership of the American College of Physician Executives and the American Medical Directors Association, for whom she is a certified medical director for nursing homes. Dr. Perijoc also provides comprehensive and compassionate care and support for patients and their loved ones at hospice facilities across Texas.
Dr. Perijoc is an extraordinary physician who sets standards other medical professionals rarely match. The residents of Plano are fortunate to have a doctor of her caliber caring for their health.
Bishwas Upadhyay, MD, is a board-certified internal medicine physician at Texas Primary & Pediatric Care in Irving & Celina, Texas. Dr. Upadhyay’s philosophy in medicine is to help the body care for itself. He strongly believes in the power of preventive medicine and places high importance on the doctor-patient relationship. He is known for being attentive and articulate, and finds joy in educating and counseling his patients.
Dr. Upadhyay is originally from the Himalayan country of Nepal. He graduated from Nepalgunj Medical College in Nepal and completed his residency training in internal medicine at Presence Saint Joseph Hospital in Chicago, Illinois, where he served as a chief resident. Afterward, he joined the University of Nevada Reno School of Medicine as an assistant professor of medicine and later served as an academic hospitalist and associate program director for their internal medicine residency program.
In addition to taking care of his patients in the hospital, Dr. Upadhyay also taught medical students and residents in both hospital and primary care settings. During his tenure as the associate program director at the University of Nevada, he developed a quality improvement and patient safety curriculum. He also coached and mentored residents in their quality improvement and patient safety projects.
In addition to his board-certification, Dr. Upadhyay is a fellow of the American College of Physicians and received several awards and recognitions throughout his medical career. Dr. Upadhyay is fluent in English, Nepali, Hindi, and Urdu, allowing him to better serve the diverse patient populations in his community.
Outside of work, Dr. Upadhyay loves hiking, spending time with his family, and traveling. He is also an amateur cook.
/assets/images/provider/photos/1970676.png)
/assets/images/provider/photos/1970676.png)
