Our History

Founded in 1947 by Nobel Prize Winner Dr. Bernard Lown, the Lown Cardiovascular Group has a rich history of compassionate, non-invasive care and treatment of all types of cardiovascular disease and conditions.

Through the years the Lown Group has been home to some of the world’s leading physicians in the cardiovascular field, physicians who have spent countless hours researching and treating heart disease and conditions.

Dr. Lown has devoted over fifty years to the practice of medicine, the field of cardiology, and the betterment of humankind. He is the author of The Lost Art of Healing and Prescription for Survival: A Doctor’s Journey to End Nuclear Madness.

Our Physicians 

Brian Bilchik, M.D. | Medical Director, Director of Sports Cardiology


Brian Z. Bilchik, MD graduated from the University of Witwatersrand Medical School in Johannesburg, South Africa in 1989. He completed his residency training at St. Mary’s Health Center, St. Louis, Missouri, and his fellowship in Cardiovascular Disease at Brigham and Women’s Hospital. Dr. Bilchik is Board Certified in Cardiovascular Disease, Internal Medicine, Echocardiography, and Nuclear Cardiology.  Dr. Bilchik focuses on second opinions, coronary disease, valvular heart disease, and arrhythmias. He is passionate about wellness, physical activity and prevention. He has been involved in national and global research and educational programs. He is an Assistant Professor in Medicine at Harvard Medical School. Dr. Bilchik joined the Lown staff in 1997. 

Dr. Bilchik is an avid exerciser; he holds a black belt in karate and plays squash or cycles most days. Exercise is his favorite prescription. Dr. Bilchik's newest passion is kiteboarding. 

Charles M. Blatt, M.D. | 

Charles M. Blatt, MD graduated from the Columbia University College of Physicians and Surgeons in 1978 and completed his residency at Beth Israel Hospital, Boston and his fellowship in Cardiovascular Disease at Brigham and Women’s Hospital. Dr. Blatt is Board Certified in Cardiovascular Disease and Internal Medicine. His clinical work has focused on the management of patients with coronary and valvular heart disease, atrial fibrillation, and the impact of psychological stress upon the heart. He has directed several research projects focusing on the roles of depression and anxiety in coronary artery disease. He is an Assistant Professor of Medicine at Harvard Medical School. Dr. Blatt joined the Lown staff in 1984.

Dr. Blatt is an outdoorsman and enjoys sailing in the summer months and skiing in the winter. He walks daily as part of routine exercise.  

Dara Lee Lewis, M.D. | Director of Non-Invasive Testing

Dara Lee Lewis, MD graduated from Harvard Medical School in 1992. She trained in Internal Medicine and Cardiovascular Disease at Brigham and Women’s Hospital. Prior to joining the Lown Group, she was on the staff of Presbyterian Heart Group in Albuquerque, NM. Dr. Lee Lewis is Board Certified in Cardiovascular Disease, Echocardiography, and Nuclear Cardiology. She is an Instructor in Medicine at Harvard Medical School, and is actively involved in medical education. Her professional interests include cardiac imaging, preventive cardiology, women’s cardiac health, and general cardiology issues including coronary artery disease and valvular heart disease. Dr. Lee Lewis also has a special interest in the management of patients experiencing cardiac symptoms of Lyme disease and POTS (Postural Orthostatic Tachycardia Syndrome). Dr. Lee Lewis joined the Lown staff in June 2013.

Dr. Lee Lewis is a former college coxswain and varsity field hockey player. Now an avid walker and advocate of a healthy and balanced lifestyle, she has a strong interest in the role of nutrition on overall health. In addition, she emphasizes the importance of a healthy lifestyle and non-pharmacologic therapies in the prevention and management of cardiac disease. 

Shmuel Ravid, M.D., MPH | 

Shmuel Ravid, MD, MPH, received his MD from the Technion – Israel Institute of Technology in 1982 and Masters in Public Health from Harvard University. After training in Internal Medicine and Cardiology in Israel, Dr. Ravid completed fellowships in Cardiovascular Disease (Brigham and Women’s Hospital) and Cardiac Electrophysiology (Lahey Clinic/New England Deaconess Hospital). He is Board Certified in Cardiovascular Disease and Internal Medicine. His clinical and research interests include management of cardiac arrhythmias, atrial fibrillation and management and long-term outcomes of coronary artery disease. He is an Associate Professor of Medicine at Harvard Medical School. Dr. Ravid joined the Lown staff in 1987.

Dr. Ravid is a former Director and President of the Lown Cardiovascular Group. He has a special interest in rhythm disorders. 

Nursing Staff

Alyson Kelley-Hedgepeth, M.D. | 

Alyson Kelley-Hedgepeth, M.D.  graduated from Boston University Medical School in 2003.  She trained in Internal Medicine at Massachusetts General Hospital and completed a Fellowship in Cardiology at Tufts Medical Center.  Dr. Kelley-Hedgepeth is Board Certified in Cardiovascular Disease and Nuclear Cardiology.  She is also a Diplomate of the American Board of Internal Medicine and Board Eligible in Echocardiography. Dr. Kelley-Hedgepeth has extensive experience in managing coronary artery disease, heart failure and arrhythmias.  Prior to joining the Lown Cardiovascular Group, Dr. Kelley-Hedgepeth worked for almost a decade as a non-invasive cardiologist at a multispecialty medical center.  There she developed cardiac disease management programs, including heart failure treatment pathways and a post-hospitalization specialized clinic. Dr. Kelley-Hedgepeth is committed to providing personalized cardiovascular care with an emphasis on early disease detection and prevention.   She specializes in cardiac lifestyle assessment, and women’s cardiovascular disease.  Her passion is preventative cardiovascular health and identifying how simple lifestyle changes promote healing and wellness. 


Dr. Kelley-Hedgepeth enjoys yoga, skiing and is learning to play golf.

Nursing Staff

Kristian Bakken, NP | 

Kristian Bakken, N.P. graduated as a Registered Nurse from the Oslo and Akershus University College of Applied Sciences in Oslo, Norway, in 2004, and he went on to complete his Nurse Practitioner degree at Northeastern University in 2014. Kristian Bakken is Board Certified as an Adult-Gerontology Acute Care Nurse Practitioner. He has 13 years of combined cardiology experience from Beth Israel Deaconess Medical Center, Brigham and Women’s Hospital, and Massachusetts General Hospital. His professional interests include cardiopulmonary exercise physiology, heart failure, and teaching. Kristian Bakken joined the Lown Cardiovascular Group in October of 2017.

Helene Glaser, RN | 

Helene Glaser is the head nurse at the Lown Cardiovascular Group, tending to patients, triaging with doctors and overseeing office staff. She graduated from the Boston City Hospital School of Nursing, and later opened the hospital's first Intensive Care Unit with her mentor, the Chief of Cardiology Dr. Polansky. Helene joined the Lown Cardiovascular Group in 1976 at the request of her good friend Dr. Thomas Graboys.

Administrative Staff

Deborah Clain | Practice Manager

Deborah Clain is the Practice Manager at the Lown Cardiovascular Group. Debbie embraces the philosophy of medicine practiced by the Lown Cardiovascular Group and is very happy to have joined a fantastic team of staff.  She holds an MBA in Non-Profit Management from Boston University and joins us from her most recent position as Operations Manager in Otolaryngology at the Massachusetts Eye and Ear Infirmary. Previously, Debbie spent 20 years working for Harvard University in a variety of financial, human resources, and operational role; and she remains committed to enacting social change through volunteering. Debbie has studied and traveled internationally, including backpacking in Nepal, the Sierras, and our own New England White Mountains. Debbie joined the Lown Cardiovascular Group in 2016.

Kathy Jordan | Patient Services Manager

Kathy Jordan joined the Lown Cardiovascular Group in 2013, and currently serves as the Patient Services Manager. She oversees the Boston Heart Home program and is the in house coordinator for billing concerns. She also assists patients with coordinating appointments, scheduling tests and offering support for insurance inquiries.She has more than 40 years' experience working in healthcare. Kathy's roles have included billing and office managers in three different ophthalmology practices, hospital and private. In addition to her professional experience, she is an avid quilter and has turned her sewing expertise into a small side business with her sister. Kathy is a firm believer that besides the practice of medicine, we are in the business of customer service. We should always strive to make each and every patient encounter pleasant and as stress-free as possible.

Find Us

Lown Cardiovascular Group
830 Boylston Street, Suite 205
Chestnut Hill, MA 02467

Our office is easily accessible by public transportation or car, with free on-site parking and no facility fees.

Reach Us

Front Desk: 617-732-1318
Appointments: 617-732-1318
Billing: 617-732-1318

Email: info@lowngroup.org

  • Facebook
  • Instagram

Office Hours

Monday-Friday (except holidays)

8:00 AM to 4:30 PM