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 is a great doctor,he listens and finds solutions.
(6 days ago)
Sep-2026
Best Dr. in town
(1 week ago)
Sep-2026
Very professional and understanding of my health needs
(1 week ago)
Aug-2026
Took time to speak to me and hear my concerns.
(2 weeks ago)
Aug-2026
Always have a great spirit. And just down to earth with a great big smile.
(2 weeks ago)
Aug-2026
Dr. Drennan is very thorough in reviewing labs, discussing the patient’s lab results, and medical suggestions. He is very easy to talk to, and makes sure that he is understood.
(2 weeks ago)
Aug-2026
Great Doctor! Very knowledgeable. Makes you feel at home, never rushes you. Give you time to ask questions and address concerns. I would not want anyone else!
(2 weeks ago)
Aug-2026
Very detailed information sharing, open for discussion not just one sided interaction. Appreciate his apology for very long wait on a day with office computer issues.
(3 weeks ago)
Aug-2026
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.
(3 weeks ago)
Aug-2026
Very funny and awesome with giving you the right information
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 is a great doctor,he listens and finds solutions.
Best Dr. in town
Very professional and understanding of my health needs
Took time to speak to me and hear my concerns.
Always have a great spirit. And just down to earth with a great big smile.
Dr. Drennan is very thorough in reviewing labs, discussing the patient’s lab results, and medical suggestions. He is very easy to talk to, and makes sure that he is understood.
Great Doctor! Very knowledgeable. Makes you feel at home, never rushes you. Give you time to ask questions and address concerns. I would not want anyone else!
Very detailed information sharing, open for discussion not just one sided interaction. Appreciate his apology for very long wait on a day with office computer issues.
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