About » Our Practice

In the early 1990s, Dr. James Semertzides and Dr. Shahriar Khalili met while practicing cardiology at Brookhaven Hospital. In 1998, the two practitioners opened their own private consultative practice, Long Island Cardiology, in Patchogue.

Shortly thereafter, Dr, Dyckman and Dr. Mercurio joined them in private practice.

The doctors at Long Island Cardiology offer patients a variety of diagnostic and consultative services.

James SemertzidesJames N. Semertzides, M.D., F.A.C.P., F.A.C.C.

Dr. Semertzides received his undergraduate degree at Rutgers College, New Jersey in 1975 and his medical degree at the Aristotelian University Facility of Medicine in Greece in 1983. He completed his Internal Residency Program at the Atlantic City Medical Center in New Jersey in 1987, and started his Infectious Disease Fellowship at St. Michael's Center in New Jersey in 1988. His Cardiology Fellowship followed at the Deborah Heart and Lung Center In New Jersey and Robert Wood Johnson Medical School. That same year he joined the Brookhaven Memorial Hospital Medical center in Patchogue as a Staff Cardiologist and opened his own private consultative practice, Long Island Cardiology Associates in 1998. Dr. Semertzides is a Fellow of American College of Cardiology and is Certified in Internal Medicine. He is the Director of Stress Testing and ECG at Brookhaven Hospital. He lives in Long Island with his wife and four children

Shahriar J. KhaliliShahriar J. Khalili, M.D., F.A.C.C., C.B.N.C.

Dr. Khalili received his undergraduate degree from the State University of New York at Stony Brook in 1984 and his medical degree from State University of New York Health Science Center in Brooklyn in 1988. He competed his Internal Medicine Residency Program at the Albert Einstein College/Jacobi Hospital of Medicine in New York in 1991 and completed his Fellowship in Cardiology at the State University of New York Health Science Center, Brooklyn (Downstate Medical Center) in 1994. From 1994 to 1998, Dr. Khalili was a staff Cardiologist at Brookhaven Memorial Hospital and opened his private consultative practice, Long Island Cardiology Associates in 1998. He is the Director of the Chest Pain E.D. at Brookhaven Hospital. He is chairman of the Cardiovascular Council at Brookhaven Hospital and immediate past president of the medical staff at Brookhaven Hospital. Dr. Khalili is a Fellow of the American College of Cardiology and is Board Certified in Cardiovascular Disease, Internal Medicine, Nuclear Medicine and Transthoracic Echocardiography. He lives on Long Island with his wife and three children.

Richard H. DyckmanRichard H. Dyckman, M.D., F.A.C.C., F.A.S.E.

Dr. Dyckman, a native New Yorker, received his undergraduate degree from Yale University in 1981 and his medical degree from Cornell Medical Center in 1985. He completed his Internship and residency in Internal Medicine at the NY Hospital-Cornell Medical Center and remained there to complete his Cardiology Fellowship. He also completed an additional year as an Echocardiography Clinical Research Fellow. After his fellowship, Dr. Dyckman entered private practice in Lehigh Valley, Pennsylvania at St. Luke’s Regional Heart Center where he was Director of Noninvasive Cardiac Services. In 1997, Dr. Dyckman joined St. Francis Hospital in Roslyn, New York as Associate Director of Echocardiography and was appointed to the clinical faculty of Columbia University. Dr. Dyckman joined Long Island Cardiology Associates in November of 2000. He is the Director of Echocardiography at Brookhaven Memorial Hospital. Dr. Dyckman is a Fellow of the American College of Cardiology and a Fellow of the American Society of Echocardiography. He is Board Certified in both Cardiology and Internal Medicine as well as Adult Echocardiography (including Stress Echocardiography and Transesophageal Echocardiography). Dr. Dyckman and his wife live in Suffolk County with their two daughters.

Vito A. MercurioVito A. Mercurio, M.D., F.A.C.P., F.A.C.C., C.B.N.C.

Dr. Mercurio received his undergraduate degree from the State University of New York at Albany and his medical degree at Hahnemann University in Philadelphia, PA in 1990. He completed his residency and internship in Internal Medicine in 1993 and Cardiovascular Disease Fellowship at North Shore University Hospital in Manhasset, New York in 1996. He was a consulting physician with Cardiology Consultants in Woodbury, New York for six years before joining Long Island Cardiology Associates in July 2002. Dr. Mercurio is a Fellow of the American College of Cardiology and is Board Certified in Cardiovascular Disease, Internal Medicine and Nuclear Medicine. He is the Director of Telemetry at Brookhaven Memorial Hospital.He lives on Long Island with his wife and two children.