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 takes the time to answer all my questions and concerns about my health issues. His explanations are in terms that are easily understood. I never feel rushed when visiting his office.
(4 days ago)
Apr-2026
Well satisfied with Dr Drennan
(5 days ago)
Apr-2026
Dr. Drennan was very informative and also shows a genuine care for my husband’s condition.
(1 week ago)
Apr-2026
Exceptional Doctor! He is so Welcoming and has such an excellent bedside manner. He is definitely what is needed in today’s healthcare. Five votes is not enough. He is clearly a TEN!!!
(1 week ago)
Apr-2026
Dr. Drennan is Awesome. Great guy and a Great Doctor!!
(1 week ago)
Apr-2026
Caring doctor . Understands the whole situation.
(2 weeks ago)
Apr-2026
Fantastic doctor and staff! They epitomize the Hippocratic Oath.
(3 weeks ago)
Mar-2026
I love Dr. Drennan he’s very thorough and knowledgeable. He makes sure that you’re comfortable with understanding the results and if you aren’t comfortable he’s going to break it down so that you are comfortable with understanding especially with my rare cardiac diagnosis!!!!
(3 weeks ago)
Mar-2026
Very concerned about his patients.
(3 weeks ago)
Mar-2026
Seems like he is a great Dr. Very friendly and professional.
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 takes the time to answer all my questions and concerns about my health issues. His explanations are in terms that are easily understood. I never feel rushed when visiting his office.
Well satisfied with Dr Drennan
Dr. Drennan was very informative and also shows a genuine care for my husband’s condition.
Exceptional Doctor! He is so Welcoming and has such an excellent bedside manner. He is definitely what is needed in today’s healthcare. Five votes is not enough. He is clearly a TEN!!!
Dr. Drennan is Awesome. Great guy and a Great Doctor!!
Caring doctor . Understands the whole situation.
Fantastic doctor and staff! They epitomize the Hippocratic Oath.
I love Dr. Drennan he’s very thorough and knowledgeable. He makes sure that you’re comfortable with understanding the results and if you aren’t comfortable he’s going to break it down so that you are comfortable with understanding especially with my rare cardiac diagnosis!!!!
Very concerned about his patients.
Seems like he is a great Dr. Very friendly and professional.