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.
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.

Dr. Brennan and his staff are awesome
I love the way he explains everything to you. Makes you feel very comfortable if he ever leaves I’m going to follow him . He that great of a doctor
Felt heard and that the staff listened to all of my concerns. Dr Drennan has a great team working for him!Chris,(NP) is wonderfull!
He explains everything in detail
Dr Drennan is the best doctor I have ever treated with!
Dr. Robert Drennan is a Professional in his knowledge of the heart!
Yes Excellent because I have an Excellent Doctor, Always Always Concern about my Heart Health and I wouldn’t trade him for nothing, I never had a bad experience since day one I met Dr Robert Drennan, the Best Heart Specialist on this side of Heaven.
Easy to talk to. Listens well to my input and questions. Explains things well.
The only word I can think of is AWESOME
Dr Dreannan is AWESOME a very caring doctor who cares about his patients health