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Specialty > Internal Medicine > Louisiana > Cardiovascular Institute of the South > Robert Drennan, M.D.
Robert Drennan, M.D.
Cardiovascular Institute of the South
Cardiology, Internal Medicine: Electrophysiologist
Baton Rouge and Zachary
Most recent review: Sep 25, 2025
New
4.9
1.1K Ratings
473 Comments
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.
4.9
1.1K Ratings
473 Comments
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.
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Most recent review: 2 days ago
• 473 total reviews
The reviews listed below were collected independently of Cardiovascular Institute of the South through rater8. Each review represents an authentic and verified patient experience.
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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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He is so nice. He spends all the time you need with him.
My favorite Dr Fixed all my heart issues.
Super Doctor
Great doc
He has excellent bedside, manners and spend time communicating with me as a patient. makes me feel comfortable with asking questions and he give the best answers as possible.
He always listens and gives me the worst and best case scenarios. He puts all the cards on the table and never forces any treatments on me unless it’s necessary.
After our visit, felt reassured we are in the best of care. Thankful to be his patient. Thoughtful, kind and willing to take the time to ensure we’re comfortable with the procedure he will be preforming. Feel as though we are in the best of hands.
Very soft spoken and caring about my medical concerns. Thank you so much Dr. Drennan.
Dr. Drennan is compassionate and so supportive. He is excellent at explaining the issues of your heart health and how to manage them. He takes his time with you and is always very kind. I am very grateful to have him as my cardiologist.
Patience, listened to my chief complaints and explained options