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.
Great Cardiologist, can't say enough about him .
(3 days ago)
Jun-2026
I’m was very pleased with my first visit.
(3 days ago)
Jun-2026
Excellent follow up from my pacemaker surgery. Received information on what to expect during my recovery. Was very helpful.
(3 days ago)
Jun-2026
As usual, Dr.Drennan continues to offer the highest care!! This man is the best!! The support staff at CIS are the best also!! Excellence!!
(3 days ago)
Jun-2026
He is great. Always listens, asks questions and never seems rushed to end the appointment He seems to care about my health and progress.
(4 days ago)
Jun-2026
Awesome!
(4 days ago)
Jun-2026
He communicated very clearly with me.
(4 days ago)
Jun-2026
Me and my father had a appointment today his 1010 mine 1020 my father wasnt able to make his because he was admitted to the hospital I waited over an hour to be seen I had to leave because I had to come back to the hospital with me father
(4 days ago)
Jun-2026
Very kind and actually listens to comments/concerns
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
Great Cardiologist, can't say enough about him .
I’m was very pleased with my first visit.
Excellent follow up from my pacemaker surgery. Received information on what to expect during my recovery. Was very helpful.
As usual, Dr.Drennan continues to offer the highest care!! This man is the best!! The support staff at CIS are the best also!! Excellence!!
He is great. Always listens, asks questions and never seems rushed to end the appointment He seems to care about my health and progress.
Awesome!
He communicated very clearly with me.
Me and my father had a appointment today his 1010 mine 1020 my father wasnt able to make his because he was admitted to the hospital I waited over an hour to be seen I had to leave because I had to come back to the hospital with me father
Very kind and actually listens to comments/concerns
He is a great Doctor,he listens to my concerns.