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.
Very knowledgeable and courteous
(6 days ago)
Mar-2026
Always has a smile.and very attended to my needs. Take time and never in a hurry
(1 week ago)
Mar-2026
Excellent and thorough Doctor.
(1 week ago)
Mar-2026
Easy to talk with. Understands what you are saying and communicates back to you in a way you can understand.
(1 week ago)
Mar-2026
Very informative, listened and responded. Seemed to actually care about my journey and his role in helping.
(1 week ago)
Feb-2026
Great appointment Great Doctor Thank You!!!
(1 week ago)
Feb-2026
He is the best Doctor you can find. If you are looking for a Dr look no further he is the one. He is not just your Dr he cares.
(1 week ago)
Feb-2026
Exceptional bed side manner, very thorough in discussing test results, and test needed as well.
(2 weeks ago)
Feb-2026
As a doctor, he listens to his patients to meet our concerns and needs.
(2 weeks ago)
Feb-2026
Dr. Drennan and the rest of the staff at CIS are always great and friendly, and thorough.
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
Very knowledgeable and courteous
Always has a smile.and very attended to my needs. Take time and never in a hurry
Excellent and thorough Doctor.
Easy to talk with. Understands what you are saying and communicates back to you in a way you can understand.
Very informative, listened and responded. Seemed to actually care about my journey and his role in helping.
Great appointment Great Doctor Thank You!!!
He is the best Doctor you can find. If you are looking for a Dr look no further he is the one. He is not just your Dr he cares.
Exceptional bed side manner, very thorough in discussing test results, and test needed as well.
As a doctor, he listens to his patients to meet our concerns and needs.
Dr. Drennan and the rest of the staff at CIS are always great and friendly, and thorough.