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Dr. Jacqueline Chan received her Medical Degree from New York Medical College.   She completed her Internal Medicine residency in addition to a chief resident year at the former St. Vincent’s Catholic Medical Center.   Dr. Chan began her Cardiovascular Disease fellowship at St.   Vincent’s Catholic Medical Center and transitioned to New York Methodist Hospital to complete her clinical training.   She is proficient in exercise treadmill stress test, echocardiography, nuclear myocardial perfusion scan, and peripheral vascular duplex.   Dr. Chan completed training as a vein specialist and performs radiofrequency venous ablation in our ambulatory procedure lab.  Currently, she is the Medical Director of Echocardiography and Vascular Imaging for our accredited ICAEL and ACR facility.  Dr. Chan is multi-board certified in Internal Medicine, Echocardiography, Nuclear Cardiology, and Cardiovascular Diseases.

Arsalan Rehmani, MD, FACC, FSCAI is an Interventional and General Cardiologist at Chinatown Cardiology P.C. Dr. Rehmani completed his residency at BronxCare Health System followed by subspecialty fellowships in cardiology and interventional cardiology at Mount Sinai Morningside Hospital. He is board-certified in multiple subspecialties including Internal Medicine, Cardiovascular Disease, Interventional Cardiology, Adult Echocardiography, Nuclear Cardiology, Endovascular Medicine, and Cardiac CT.



Dr. Rehmani accepts new patients, and he currently provides consultations at various locations in New York City, including the Upper West Side and Chinatown in Manhattan, Queens, Brooklyn, and the Bronx. Dr. Rehmani is multilingual, being fluent in English, Urdu, Hindi, Russian, and Ukrainian.

Tak Kwan, MD, FAHA, FACC, FACP, FSCAI, is a board-certified and internationally renowned cardiologist at Chinatown Cardiology, PC, in the Chinatown and Upper West Side areas of New York City, Brooklyn and Flushing, New York. Chief of Cardiology, Lenox Hill Greenwich Village, Northwell Health, Director, Asian Practice Initiatives at Lenox Hill Hospital, Clinical Professor of Medicine/Cardiology, Zucker School of Medicine at Hofstra/Northwell, and President, Chinatown Cardiology, P.C. Dr. Kwan earned his medical degree and completed his residency at the State University of New York Downstate Medical Center. For the past 20 years, Dr. Kwan has been an active member within the Chinese community. He served as the president of the Chinese-American Medical Society. He then went on to establish Chinatown Cardiology in order to assist those in the neighborhood. Due to his generous donations and charitable services for the community, Dr. Kwan was awarded the Ellis Island Medal of Honor in 2010.

Dr. Kwan is now the interventional cardiology director at Mount Sinai West, the catheterization laboratory co-director at Mount Sinai Beth Israel, and the affiliate medical director of international services at Mount Sinai Health. He is affiliated with Mount Sinai Beth Israel, serving as a professor at the Icahn School of Medicine, the executive director of Asian services, and the site program director of interventional cardiology. Besides being directly involved in patient care, Dr. Kwan is also an active participant in clinical research.

Dr. Kwan is recognized internationally as an expert in general and interventional cardiology. Not only is he incredibly skilled, but he is also a pioneer in transradial cardiac catheterization, complex percutaneous coronary intervention, structural heart intervention, and transpedal lower extremity peripheral catheterization. Dr. Kwan is committed to providing only the best treatment available to his patients. Whether the patient is seeking treatment for routine heart disorders or is suffering from more complex symptoms, Dr. Kwan has the experience and skills necessary to ensure that the proper care and attention are provided to every patient at Chinatown Cardiology.

For a highly skilled and knowledgeable cardiologist, make an appointment with Dr. Kwan either online or by phone today.

Dr. Henry Siu earned his Medical Degree from the Sophie Davis School of Biomedical Education/SUNY Downstate Medical Center. He completed his post-graduated training in Internal Medicine at Yale New Haven Hospital, and Cardiology/Interventional Cardiology Fellowship at Thomas Jefferson University Hospital in Philadelphia. 

Dr. Siu has expertise in general cardiology, multi-modality cardiac imaging, and vascular imaging. As an interventional cardiologist, Dr. Siu is highly skilled in cardiac catheterizations and peripheral vascular interventions, and management of complex coronary/valvular heart disease. He has proven experience in private practice and in the academic setting, with focus on providing the highest quality care and most up-to-date diagnostic and treatment strategies. In his free time, Dr. Siu enjoys exercising and playing the piano. Dr. Siu speaks Cantonese, Mandarin, and English.

Dr. David Lau received his Medical Degree and PhD degree in Physiology and Biophysics from NYU School of Medicine.   He completed his entire clinical training in Internal Medicine, Cardiovascular Disease, and Clinical Cardiac Electrophysiology at Columbia University - Presbyterian Medical Center.   Dr. Lau specializes in general cardiology and is an expert at the diagnosis of electrophysiological disorders and management after pacemaker, defibrillator, and remote cardiac monitor implantation.   Dr. Lau has presented his research at national meetings and published extensively in the area of electrophysiology.   He has a particular interest in the management of syncope and palpitations.   Dr. Lau is multi-board certified in Internal Medicine, Echocardiography, Cardiovascular Diseases, and Clinical Cardiac Electrophysiology and is Registered in Vascular Interpretations.

Michael Liou, MD, FACC, FSCAI, is a skilled, board certified interventional cardiologist practicing at Chinatown Cardiology P.C., which has locations in Flushing, Brooklyn, Chinatown, and the Upper West Side of Manhattan. 

Dr. Liou earned his medical degree from SUNY Stony Brook School of Medicine after completing the prestigious Sophie Davis Biomedical Education Program at CUNY City College. He completed his internship and residency in internal medicine at NYU Langone Medical Center and performed his fellowship training in cardiovascular disease at Beth Israel Medical Center (now known as Mount Sinai Beth Israel) and returned to NYU Langone Medical Center for his advanced interventional cardiology subspecialty fellowship. 

Although he provides care for all cardiovascular conditions, Dr. Liou’s clinical expertise is in performing transradial cardiac catheterization, peripheral endovascular intervention, percutaneous mitral & aortic valvuloplasty, and ASD/PFO closure. He continues to participate in clinical research with a special focus on cardiovascular diseases affecting Asian Americans. 

Dr. Liou is multi-board certified in cardiovascular diseases, echocardiography, nuclear cardiology, and interventional cardiology.

A. Natalie Ascher, MD (FKA Natalie Marks, MD) is a board-certified vascular medicine physician who serves the community of Borough Park in Brooklyn, New York, at the Vascular Institute of New York. With more than 25 years of experience, Dr. Ascher is passionate about using the latest advancements in medical technology to diagnose and treat a wide range of vascular conditions, including hypertension, peripheral arterial disease (PAD), venous leg ulcers, and diabetic vascular disease.

Growing up in Ukraine, Dr. Ascher earned her Medical Doctorate from Crimea State Medical University in Simferopol, Ukraine. She later moved to the United States to complete her internal medicine residency at Maimonides Medical Center in Brooklyn. 

Dr. Ascher is certified by both the American Board of Vascular Medicine and Internal Medicine. She also holds certifications from the National Alliance of Wound Care and Ostomy and in Diagnostic Medical Sonography (RVT) for vascular technology as well as in vascular sonograms interpretation (RPVI).

In addition to her time at the Vascular Institute of New York, Dr. Ascher is an attending physician at Brooklyn’s Maimonides Medical Center, New York Community Hospital, and NYU Langone Brooklyn Medical Center. She also belongs to a number of professional organizations, including the American College of Physicians and the American Society for Vascular Medicine.

Click here to read Dr. A. Natalie Ascher's online profile.

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, Bloomfield, Nutley & Livingston, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.

Hitesh Patel, MD is a board-certified physician specializing in internal medicine and obesity medicine. He provides expert, compassionate primary care at Premier Healthcare Associates, PC, conveniently located in a state-of-the-art facility near Ocean University Medical Center (OUMC), part of Hackensack Meridian Health, in Brick, New Jersey. 

Dr. Patel offers a wide range of services, including the diagnosis and management of chronic conditions such as thyroid disorders, heart disease, diabetes, COPD, and mental health conditions. His practice also provides preventive care, comprehensive physical exams, medical weight loss programs, and aesthetic treatments like TempSure® Envi for skin tightening. To enhance patient care, the office uses a modern electronic medical records system, and most prescriptions are sent electronically for convenience and efficiency.

Dr. Patel completed his undergraduate studies at Loyola University Chicago, earning a double major in chemistry and biology. He was awarded the Loyola University Presidential Scholarship (a tuition merit scholarship), was a national member of the Pre-Medical Honor Society, and consistently made the Dean’s List. He earned his medical degree from Ross University School of Medicine in 2000, with extensive training across specialties including nephrology, urology, gastroenterology, cardiology, psychiatry, neurology, pulmonology, critical care, surgery, and infectious disease.

His postgraduate training in internal medicine included residencies at West Suburban Hospital in Oak Park, Illinois, and St. Vincent’s Catholic Medical Center in Queens, New York, affiliated with New York Medical College. Following his training, Dr. Patel served as both a staff and attending teaching physician. He was Associate Director of the Transitional Year Residency Program at Ocean University Medical Center, Clinical Site Director for Hackensack Meridian School of Medicine, and currently serves as Chairman of Medicine at Ocean University Medical Center, where he leads academic and clinical efforts within the department.

Dr. Patel also served as a physician for Monmouth and Middlesex County Correctional Facilities, providing care in challenging and high-security environments. In addition, he worked as an occupational physician for Continental Airlines at Newark International Airport. Before founding his private practice in Brick in 2006, he practiced medicine in both the Bronx, New York, and Manhasset, Long Island, gaining extensive experience in diverse clinical settings.

Dr. Patel is an active member of the American Medical Association, the American College of Physicians, and the American Association of Physicians of Indian Origin. He is fluent in English, Gujarati, and Hindi. Outside of work, he enjoys spending quality time with his family and pursuing personal interests such as yoga, biking, hiking, and traveling.

The Heart Center of the Oranges, PA, is a medical practice with multiple locations: West Orange, East Orange, South Orange, Maplewood, Newark, Belleville, Bloomfield, Nutley & Livingston, New Jersey. Led by a skilled team of physicians, nurses, and other medical professionals, the practice serves people aged 20 and older in person and virtually via telemedicine.

The Heart Center of the Oranges, PA, offers specialty services, including cardiology, endocrinology, gynecology, internal medicine, neurology, podiatry, pulmonology, women’s wellness, pediatric endocrinology, nutrition, and sleep medicine. Patients with chronic diseases or general medicine concerns can turn to the highly trained experts at The Heart Center of the Oranges, PA, for superior care.

The skilled medical team personalizes each treatment plan based on a patient’s medical needs, lifestyle, and desired outcomes.

Those with diabetes, foot or ankle issues, gynecology concerns, or heart, kidney, or lung diseases rely on The Heart Center of the Oranges, PA, for exceptional care in a welcoming setting. Undergoing routine care reduces the risk of bothersome symptoms and severe medical complications. 

The Heart Center of the Oranges, PA, team is friendly, providing top-notch patient-centered care using the latest advances in technology and research-backed treatments. They compassionately welcome new and existing patients to the practice.

Schedule an in-person or telehealth appointment at The Heart Center of the Oranges, PA, by phone or online today.

Dr. Timothy Jayasundera and his colleague Dr. Marsha Wesley provide a variety of medical services to their patients from offices located in Ozone Park, Brooklyn, and Manhattan, New York. Services range from primary care, annual wellness checkups, and regular health screenings to specialist treatment for cardiovascular issues such as hypertension, high cholesterol, chest pain and shortness of breath.

Dr. Jayasundera completed his medical degree at Ross University School of Medicine and his internship in internal medicine at Robert Wood Johnson University Hospital. He went on to complete his residency at Georgetown University and fellowships in Cardiology and Interventional Cardiology at Drexel University and Mount Sinai Hospital, respectively. Dr. Wesley  completed her medical degree at State University of New York (SUNY) Buffalo School of Medicine and Biomedical Sciences.

Drs. Jayasundera and Welsey are all dedicated to providing the highest quality care to their patients. They offer a warm caring environment to make their patients feel comfortable. The doctors take pride in practicing preventative medicine ensuring that all of their patients maintain and improve their health. In addition to treating various medical conditions Dr. Jayasundera and Dr. Wesley also educate patients on their particular medical diagnosis to ensure that the patient maintains good health and stays within healthy guidelines for vital statistics.

Dr. Jayasundera and Dr. Wesley are currently welcoming new patients and looking forward to building lasting relationships to improve and maintain health. Most major forms of insurance are accepted.

Dr. Ijaz Ahmad, M.D., F.A.C.C., is an experienced cardiologist, skilled in the diagnosis and treatment of an array of heart-related diseases and conditions in patients from Park Slope and throughout Brooklyn, NY. At Park Slope Cardiac and Diagnostic, Dr. Ahmad offers patient-centered care for issues like congestive heart failure (CHF), coronary artery disease (CAD), peripheral vascular disease (PVD and PAD) and chest pain. With advanced training in cardiac diagnostic imaging, Dr. Ahmad is skilled in performing echocardiograms, nuclear stress testing and ultrasounds, as well as cardiac catheterization and other minimally-invasive procedures.

A fellow of the American College of Cardiology (F.A.C.C.), Dr. Ahmad specializes in non-invasive and minimally-invasive cardiology to help patients get the care they need while avoiding surgery whenever possible. He and his team at Park Slope Cardiac and Diagnostic are committed to providing the highest quality care throughout every phase of treatment. Patients receive compassionate, customized care focused on their needs and based on in-depth evaluations using state-of-the-art testing and diagnostic techniques and technology for long-term health and wellness. With an emphasis on prevention and education, Dr. Ahmad helps patients understand their medical issues and risks, providing them with the education they need to enjoy better health and a better quality of life.

Dr. Ahmad completed his medical degree at Allama Iqbal Medical College, followed by a residency and internship at Interfaith Medical Center and a fellowship in cardiovascular diseases at New York Methodist Hospital. Widely published in top medical journals, including the International Journal of Cardiovascular Diseases and the Journal of Nuclear Cardiology, Dr. Ahmad was awarded the New York’s Top Doctors Award in 2016. Certified in nuclear cardiology by the American Society of Nuclear Cardiology (ASNC) and echocardiography by the National Board of Echocardiography (NBE), Dr. Ahmad maintains active memberships in several professional societies, including the American College of Cardiology, the American Society of Echocardiography, the American Society of Nuclear Cardiology and the American College of Physicians.

Park Slope Cardiac and Diagnostic welcomes new patients and accepts most major insurance plans. Dr. Ahmad speaks both English and Hindi.

Mamatha Mohan, MD, is a board-certified internal medicine physician at The Heart Center of the Oranges, PA, providing outstanding health care. The practice has locations in East Orange, West Orange, South Orange, Maplewood, Newark, and Bloomfield, New Jersey. 

Dr. Mohan was born and raised in India. She studied at Kakatiya Medical College in Warangal, Telangana, India, earning her medical degree. After graduation, Dr. Mohan completed a medical internship at Gandhi Medical College, Secunderabad, in Hyderabad, India, before moving to the United States.

Upon arriving in America, Dr. Mohan completed an internal medicine residency at Mountainside Hospital in Montclair, New Jersey. She excelled in the program, becoming chief resident in her final year. 

At The Heart Center of the Oranges, PA, Dr. Mohan provides preventive, primary, and chronic care. She loves building strong and lasting relationships with her patients and feels honored to play an active role in keeping them healthy and well. 

Dr. Mohan is board-certified by the American Board of Internal Medicine. She’s also a member of several professional organizations, including the Female Physician Group of New Jersey, the American Medical Association, and the American College of Physicians.

Outside of work, Dr. Mohan enjoys traveling and watching movies. She’s also an avid cook who likes preparing new recipes for her family. 

Dr. Mohan welcomes old and new patients alike to The Heart Center of the Oranges, PA.

Dr. Tara Rajiyah is an experienced adult and pediatric endocrinologist at The Heart Center of the Oranges, PA, who sees patients at the West Orange and Belleville offices. 

Dr. Rajiyah earned her medical degree at the Royal College of Surgeons in Ireland in Dublin and completed internal medicine and pediatrics residencies at Newark Beth Israel Medical Center in New Jersey. Dr. Rajiyah also completed pediatric and adult endocrinology training at the University of Chicago in Illinois. 

She offers expertise in caring for children and adults with Type 1 and Type 2 diabetes, thyroid disorders, hormone imbalances, hypoglycemia, polycystic ovary syndrome (PCOS), and pubertal and growth concerns. She’s highly skilled in endocrinology and medical weight management — nutrition counseling plays a vital role in her treatment plans. 

Dr. Rajiyah is compassionate, personalizing treatment plans based on a patient’s unique needs. She maintains her medical credentials with continuing education and uses the latest advances in treatments and technologies.

Dr. Rajiyah welcomes new and existing patients to The Heart Center of the Oranges, PA, and looks forward to exceeding their expectations. 

Medical Compass MD, led by David Dunaief, MD, is an integrative, functional, and lifestyle medicine practice with offices in Brooklyn Heights, Brooklyn, in New York City and in Setauket, New York, on Long Island.

Dr. Dunaief takes a plant-based approach to wellness as derived through nutritional medicine and lifestyle interventions that reverse, prevent and treat chronic disease. He takes an individualized approach to care, using cutting-edge medical research to guide his decision making.  

Medical Compass MD specializes in chronic care management, providing integrative medicine treatments for conditions like autoimmune disorders, diabetes, migraines, and heart disease. 

With a focus on preventive medicine, Dr. Dunaief’s integrative approach uses the low inflammatory foods every day (LIFE) diet — a plant-based, nutrient-dense, whole-foods approach to health and wellness.

Dedicated to improving health care for all, the practice produces cutting-edge research on the LIFE diet that has been published in peer-reviewed medical journals.

At Medical Compass MD, the focus is on reversing, treating, and preventing chronic disease by connecting conventional medicine with lifestyle modifications. This approach gives patients the ability to take a more proactive role in managing their own health.

For evidence-based medical care for optimal health, call Medical Compass MD or request an appointment online today.

Welcome to the Office of Dr. Irina Gressel

Irina Gressel, MD, is a skilled primary care physician and the medical director of Health Styles Medicare PC in New York City. Dr. Gressel brings her years of expertise to residents of Fort Greene, Brooklyn, and her dedication to improving the lives and health outcomes of all her patients.

Dr. Gressel completed her medical degree from Vitebsk State Medical University and an internship at Polotsk Central City Hospital, both located in Belarus. She then completed an additional internship and her residency at The Brooklyn Hospital Center in New York, where she remained as an attending physician for several years.

In addition to practicing medicine, Dr. Gressel served as a clinical instructor in medicine at New York University and is currently a clinical assistant professor of medicine through the Weill Cornell Medical College, based at The Brooklyn Hospital Center. She is a member of the American College of Physicians and the American Medical Association.

Under the direction of Dr. Gressel, Health Styles Medical Center PC is a primary care clinic dedicated to a comprehensive approach to treatment. At their modern office, Dr. Gressel and her team strive to implement the latest technology and techniques in their patients’ treatment plans. They offer a wide range of both primary care and aesthetic services, including routine annual exams, treatment for acne, Botox®, IV infusion therapy, and weight management. Dr. Gressel also offers the convenience of telemedicine services so patients can receive the care they need from the comfort of their homes.

IIrina Gressel, MD, is committed to high-quality care and service for all her patients. To make an appointment, call the office or book online today.