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.
Seems like he is a great Dr. Very friendly and professional.
(5 days ago)
Mar-2026
After the visit I feel like I’ve been seen and heard. Good physician.
(1 week ago)
Mar-2026
Nothing but praise for Dr Drennan and his team.
(1 week ago)
Mar-2026
Excellent
(2 weeks ago)
Mar-2026
First time patient and I could not be more pleased. Dr Drennan was very attentive and put together a plan of action that addressed my concerns. Highly recommend!
(2 weeks ago)
Mar-2026
10AM appointment got called back at 10:40AM saw Doctor around 11:00 AM
(2 weeks ago)
Mar-2026
Dr.Drennan was very kind and a great listener. Answered all of my questions.
(2 weeks ago)
Mar-2026
Very knowledgeable and courteous
(3 weeks ago)
Mar-2026
Always has a smile.and very attended to my needs. Take time and never in a hurry
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.
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Seems like he is a great Dr. Very friendly and professional.
After the visit I feel like I’ve been seen and heard. Good physician.
Nothing but praise for Dr Drennan and his team.
Excellent
First time patient and I could not be more pleased. Dr Drennan was very attentive and put together a plan of action that addressed my concerns. Highly recommend!
10AM appointment got called back at 10:40AM saw Doctor around 11:00 AM
Dr.Drennan was very kind and a great listener. Answered all of my questions.
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.