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.
Dr Drennan NEVER rushes his time with you. He answers all your questions with the knowledge of a great surgeon. I have such confidence in him.
(5 days ago)
Aug-2026
Very funny and awesome with giving you the right information
(5 days ago)
Aug-2026
He is exceptional. I really appreciate him.
(6 days ago)
Aug-2026
One of the smartest doctors I've ever had. He answers all your questions with a confidence that makes you feel good about trusting him.
(6 days ago)
Aug-2026
I was suppose to get a print out of my MRI results but didn’t get it is it possible to mail it?
(6 days ago)
Aug-2026
The overall care and quality of treatment by Dr. Drennan is exceptional. His kindness and compassion are the very essence of this doctor. He is simply the best. I am very grateful he is my physician.
(1 week ago)
Aug-2026
Great Listener……He is Taking Good Care of Me.
(1 week ago)
Aug-2026
Excellent
(1 week ago)
Aug-2026
He is very interested in the correct care for his patients.
(2 weeks ago)
Aug-2026
Dr. Drennan always goes above and beyond and never makes me feel like I am crazy like other doctors do. He explains in terms thats understandable.
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
Dr Drennan NEVER rushes his time with you. He answers all your questions with the knowledge of a great surgeon. I have such confidence in him.
Very funny and awesome with giving you the right information
He is exceptional. I really appreciate him.
One of the smartest doctors I've ever had. He answers all your questions with a confidence that makes you feel good about trusting him.
I was suppose to get a print out of my MRI results but didn’t get it is it possible to mail it?
The overall care and quality of treatment by Dr. Drennan is exceptional. His kindness and compassion are the very essence of this doctor. He is simply the best. I am very grateful he is my physician.
Great Listener……He is Taking Good Care of Me.
Excellent
He is very interested in the correct care for his patients.
Dr. Drennan always goes above and beyond and never makes me feel like I am crazy like other doctors do. He explains in terms thats understandable.