Jonathan Vafai, MD
A board-certified cardiologist, bringing nearly two decades in cardiovascular medicine to the prevention, diagnosis, and long-term treatment of heart conditions.
About
Dr. Vafai has been seeing patients at South Florida Heart Institute in Delray Beach since 2011.
Since beginning advanced cardiology fellowship training in 2007, Dr. Vafai has devoted nearly two decades to cardiovascular medicine.
He chairs the Department of Cardiology at Delray Medical Center, a role that reaches beyond his own patients into credentialing, policies and protocols, peer review, and a seat on the hospital's Medical Executive Committee. He also serves as Medical Director of the Echocardiography Laboratory there, and previously served as Vice-Chairman of the Department of Medicine from 2018 to 2020. He is core clinical faculty for the FAU Cardiology Fellowship at Florida Atlantic University's Schmidt College of Medicine, mentoring two fellows each year in echocardiography and cardiac imaging.
He trained at NYU School of Medicine, completed internal medicine training at Beth Israel Deaconess Medical Center (Harvard Medical School), and served as Chief Fellow during his cardiology fellowship with the NYU program at Northwell Health. He is a Fellow of the American College of Cardiology and the American Society of Echocardiography.
He has practiced with the same group, South Florida Heart Institute, since 2011. When a patient is admitted to Delray Medical Center, any member of that trusted team may care for them in the hospital, but Dr. Vafai remains their primary cardiologist: the one who knows their history and picks up the thread when they go home.
Philosophy of care
Cardiology has been my sole focus and life's work. I care deeply about my patients and approach every visit the way I would want my own family to be treated—with time, honesty, compassion, and respect.
My philosophy is lifestyle first whenever possible. Exercise, nutrition, and daily habits form the foundation of heart health, and medications or procedures are added thoughtfully when they truly serve your best interest. When I make a recommendation, it is never routine—it is based on experience, evidence, and a genuine belief that it is right for you.
My role is to educate, guide, and offer clear advice; your role is to make the decisions that feel right for your life and values. The best care happens when we work together through shared decision-making.
I have trained at leading hospitals in New York and Boston, and that experience continues to guide my care today. Even while practicing here in Florida, I rely on a broad national perspective and a trusted network of outstanding specialists. When referrals are needed, I send patients to people I trust and would confidently recommend to my own family.
I am deeply grateful for the trust my patients place in me. It is a privilege to care for you and to be part of your team.
— Jonathan Vafai, MD
Clinical focus
Clinical cardiology
Most of my week is general cardiology: the visit where we work out whether a symptom is the heart at all, and the long-term follow-up of patients I've known for years. I also care for patients in the hospital at Delray Medical Center, so office and inpatient care aren't two separate worlds.
Cardio-oncology
Some cancer treatments can affect the heart, occasionally years later. I work alongside oncologists at Delray Medical Center and area cancer centers to watch for that early. A deep background in imaging and keeping current with newer chemotherapy and immunotherapy regimens is what sets this apart from general cardiology. The goal is to protect the heart without ever getting in the way of treating the cancer.
Echocardiography
Imaging is the part of cardiology I've stayed closest to since fellowship. I direct the Echocardiography Laboratory at Delray Medical Center, recertified with the National Board of Echocardiography in 2022, and read my own patients' studies. An echo is only as useful as the interpretation behind it.
Structural heart disease
I don't implant valves; I'm the imager on the heart team. My part is deciding who is a candidate for catheter-based aortic, mitral, or tricuspid valve treatment, when the timing is right, and whether the result is what we hoped for. I've served as an investigator on several of the trials that brought these therapies into practice.
Quality & education
As Chairman I lead the department's quality-improvement work, and as core faculty for the FAU cardiology fellowship I teach the cardiology fellows about echocardiography. Teaching keeps you honest: having to explain why I read a study a certain way or make a recommendation is the best check on my own skills and forces me to stay up to date.
I'm a non-invasive cardiologist. I don't perform catheterizations or stents, ablations, or device implants. When a patient needs one of those, I refer to a specific colleague I know and trust, often someone I work beside at Delray Medical Center every week, and I stay involved before and after. Being clear about the limits of my own lane is part of the job.
Conditions treated
A test should answer a question. I order one when the result would change what we do, not as a reflex and not to be thorough for its own sake. Most of what's listed here is done in our office, and I read the echocardiograms and nuclear studies myself; cardiac CT goes through outside facilities, and a TEE is done at Delray Medical Center. If I'm not recommending a test you expected, ask me. I'd rather explain than order something that won't help.
Media
Meet the Doctor
A short introduction to Dr. Vafai's practice and approach to cardiac care, produced by Palm Beach Health Network.
Watch the video ↗On WPTV: Cardio-Oncology
Dr. Vafai is interviewed on WPTV about Delray Medical Center's cardio-oncology program, which monitors heart health during cancer treatment.
Watch the segment ↗On CBS12: Damar Hamlin
Dr. Vafai speaks with CBS12 about Damar Hamlin's on-field collapse, explaining commotio cordis and how rare cardiac arrest is among athletes.
Read the segment ↗Heart Month
It's Heart Month! Dr. Vafai, Chair of Cardiology at Delray Medical Center, talks about heart disease and how you can stay heart-healthy.
Watch the video ↗South Florida Heart Institute
Boca Raton Observer profiles the Castle Connolly-recognized cardiologists of South Florida Heart Institute, including Dr. Vafai, Chief of Cardiology at Delray Medical Center.
Read the profile ↗Patient reviews
"Always very professional, caring, thorough, a good listener and a great problem solver."
"Dr. Vafai is outstanding, knowledgeable, and exceptionally responsive to messages."
"A caring and competent cardiologist who invests time to analyze and evaluate the patient's condition."
What to expect on your first visit
A little preparation helps your first appointment run smoothly and gives Dr. Vafai the fullest picture of your heart health from day one.
Frequently asked questions
Do you accept my insurance plan?
Please call the office for these details. We take most major insurances.
Can I walk in, or do I need a scheduled appointment?
Please call for an appointment. You may be advised to speak with a nurse to help triage your issue. If the issue is urgent, you may be advised to go to the ER.
If you are experiencing a medical emergency, call 911 or go to your nearest emergency room immediately — do not wait for a callback from the office.
How do I reach Dr. Vafai between visits?
Call the office and our nursing staff will triage your question and get it to Dr. Vafai, or send a message through the patient portal, which he reviews himself. For anything that can't wait, call rather than message.
How do I request medication refills?
You can call the office and leave a message, or request a refill through the patient portal.
What is the cancellation or late-arrival policy?
We appreciate advance notice, as other patients may have urgent issues and want to be seen. If you are more than 5–10 minutes late for your appointment, you will be asked to reschedule.