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 excellent. I feel fortunate to have him as my physician.
(6 days ago)
May-2026
Very friendly and helpful
(1 week ago)
May-2026
Good bedside manners.
Answers questions
Explain what he’s talking about,where the patient can understand. Thank you Dr Drenna. 🙏🏽
(1 week ago)
May-2026
Good listener and very Professional
(1 week ago)
May-2026
Very professional, courteous, and knowledgeable!
(1 week ago)
May-2026
A very good Cardiologist.
(2 weeks ago)
May-2026
Excellent
(2 weeks ago)
May-2026
I love my Doctor he is the best
(2 weeks ago)
May-2026
He’s the best cardiologist around
(3 weeks ago)
May-2026
He is such a patient and kind provider. He shows genuine concern and compassion for his patients and is knowledge is unlike no other! I love Dr. Drennan!
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 excellent. I feel fortunate to have him as my physician.
Very friendly and helpful
Good bedside manners. Answers questions Explain what he’s talking about,where the patient can understand. Thank you Dr Drenna. 🙏🏽
Good listener and very Professional
Very professional, courteous, and knowledgeable!
A very good Cardiologist.
Excellent
I love my Doctor he is the best
He’s the best cardiologist around
He is such a patient and kind provider. He shows genuine concern and compassion for his patients and is knowledge is unlike no other! I love Dr. Drennan!