Dr. Robert Drennan is board-certified in internal medicine, cardiology, nuclear cardiology and clinical electrophysiology. Dr. Drennan is a member of the American College of Cardiology, the Heart Rhythm Society, and the American Society of Nuclear Cardiology. He has earned many awards, such as the Douglas Scholarship and the College of Charleston Founder’s Scholarship.
Dr. Robert Drennan is board-certified in internal medicine, cardiology, nuclear cardiology and clinical electrophysiology. Dr. Drennan is a member of the American College of Cardiology, the Heart Rhythm Society, and the American Society of Nuclear Cardiology. He has earned many awards, such as the Douglas Scholarship and the College of Charleston Founder’s Scholarship.
The reviews listed below were collected independently of Cardiovascular Institute of the South through rater8. Each review represents an authentic and verified patient experience.
Efficient, confidence inspiring.
(1 week ago)
Sep-2026
Always so through, open to try out out of the box ideas, and just all around great.
Extrs thanks to him for taking the time out his day to answer questions for my daughter's science fair project. Our gratitude is beyond words! I know hes a busy guy!
(1 week ago)
Sep-2026
Love my Dr very personable!
(1 week ago)
Sep-2026
Dr Drennan does an excellent job treating me. He spends enough time making sure that I understand what he is doing and why. He points to the results with his sheepish grin. I am very satisfied with his treatment.
(1 week ago)
Sep-2026
Dr. Robert Drennan is awesome,
He’s a great vascular surgeon and he loves what he do! And he has also stick to his first vow; first do no harm.
Thanks, Dr. Drennan for all you do.
(1 week ago)
Sep-2026
Dr Drennan is the absolute best cardiologist. I’m very confident in his ability and care. I feel fortunate to have him as my cardiologist. Thank you Dr Drennan
(1 week ago)
Sep-2026
Amazing Doctor! Very caring put his patient first.
(1 week ago)
Sep-2026
He he was very knowledgeable and explained all the pros and cons of the procedure procedures that he wanted or felt like would be best for me. I appreciated the fact that he explained it.
(2 weeks ago)
Sep-2026
Dr. Drennan was so sweet. He answered all my questions.He is very good.
Dr. Robert Drennan is an electrophysiologist with CIS in Baton Rouge and Zachary. He completed his Bachelor of Science degree in biochemistry and molecular biology, as well as a Bachelor of Arts degree in chemistry, at the College of Charleston in South Carolina. He earned his doctorate of medicine from the University of South Carolina School of Medicine in Columbia, South Carolina. He completed a residency in internal medicine from the Tulane University School of Medicine in New Orleans. He also completed both his cardiology and electrophysiology fellowship at the Louisiana State University Health Science Center in New Orleans.
Dr. Drennan is board-certified in internal medicine, cardiology, nuclear cardiology and clinical electrophysiology. He previously worked at Touro Infirmary, and he also worked as a lab assistant at the Medical University of South Carolina and at the College of Charleston.
Dr. Drennan is a member of the American College of Cardiology, the Heart Rhythm Society, and the American Society of Nuclear Cardiology. He has presented, researched and written for numerous publications on a variety of topics including sudden cardiac arrest, atrial fibrillation, and peripheral arterial disease. He has earned many awards, such as the Douglas Scholarship and the College of Charleston Founder’s Scholarship.
See other doctors in Cardiovascular Institute of the South
Efficient, confidence inspiring.
Always so through, open to try out out of the box ideas, and just all around great. Extrs thanks to him for taking the time out his day to answer questions for my daughter's science fair project. Our gratitude is beyond words! I know hes a busy guy!
Love my Dr very personable!
Dr Drennan does an excellent job treating me. He spends enough time making sure that I understand what he is doing and why. He points to the results with his sheepish grin. I am very satisfied with his treatment.
Dr. Robert Drennan is awesome, He’s a great vascular surgeon and he loves what he do! And he has also stick to his first vow; first do no harm. Thanks, Dr. Drennan for all you do.
Dr Drennan is the absolute best cardiologist. I’m very confident in his ability and care. I feel fortunate to have him as my cardiologist. Thank you Dr Drennan
Amazing Doctor! Very caring put his patient first.
He he was very knowledgeable and explained all the pros and cons of the procedure procedures that he wanted or felt like would be best for me. I appreciated the fact that he explained it.
Dr. Drennan was so sweet. He answered all my questions.He is very good.
Excelente médico muy profesional y buen doctor