Dr. Katherine Brennan is a cardiologist at Cardiovascular Institute of the South in Lafayette.
Dr. Brennan attended Loyola University in Baltimore, Maryland where she earned a bachelor’s degree in biology and graduated summa cum laude. Her studies continued at Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia, Pennsylvania where she earned her doctorate, and returned for her cardiovascular disease fellowship. Her internship and residency in internal medicine were completed at Beth Israel Deaconess Medical Center in Boston, Massachusetts.
Dr. Katherine Brennan is a cardiologist at Cardiovascular Institute of the South in Lafayette.
Dr. Brennan attended Loyola University in Baltimore, Maryland where she earned a bachelor’s degree in biology and graduated summa cum laude. Her studies continued at Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia, Pennsylvania where she earned her doctorate, and returned for her cardiovascular disease fellowship. Her internship and residency in internal medicine were completed at Beth Israel Deaconess Medical Center in Boston, Massachusetts.
The reviews listed below were collected independently of Cardiovascular Institute of the South (CIS) through rater8. Each review represents an authentic and verified patient experience.
She is very knowledgeable and friendly with the patients
(5 days ago)
Apr-2026
Very straight to the point. Excellent Doctor.
(6 days ago)
Apr-2026
She listened to me and my concerns. Explained things to me about my situation. Was very kind and caring. I appreciated that!
(6 days ago)
Apr-2026
Very easy to talk to and she explains everything. Very knowledgeable and informative
(1 week ago)
Apr-2026
She's listens and cares
(1 week ago)
Apr-2026
The first thing my husband said when he arrived home from your visit is “Dr. Brennan actually listened to me”. This is the highest praise we can give you.
My husband is an old school, slow talking Texan that most Doctors don’t have time to let him articulate his needs. Thank you so much Dr. Brennan.
(1 week ago)
Apr-2026
Dr. Brennan always takes time to discuss our concerns with my cousin (patient) & I. She always has my cousin’s best interest in mind and makes recommendations for her based on her advanced age, quality of life & safety needs.
(1 week ago)
Apr-2026
Really great doctor, she explains things clearly and always willing to help her patients I’m lucky to have them
(1 week ago)
Apr-2026
She takes time to listen and really cares about her patients.
Dr. Katherine Brennan is a cardiologist at Cardiovascular Institute of the South (CIS) in Lafayette.
Dr. Brennan attended Loyola University in Baltimore, Maryland where she earned a bachelor’s degree in biology and graduated summa cum laude. Her studies continued at Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia, Pennsylvania where she earned her doctorate, and returned for her cardiovascular disease fellowship. Her internship and residency in internal medicine were completed at Beth Israel Deaconess Medical Center in Boston, Massachusetts.
Dr. Brennan is certified in internal medicine and echocardiography. Her clinical focuses include general cardiology, echocardiography, prevention, and cardiovascular disease in women. She is a member of Phi Beta Kappa and many additional honor societies. In her spare time, she enjoys playing the piano, attending group workout classes, and baking.
See other doctors in Cardiovascular Institute of the South (CIS)
She is very knowledgeable and friendly with the patients
Very straight to the point. Excellent Doctor.
She listened to me and my concerns. Explained things to me about my situation. Was very kind and caring. I appreciated that!
Very easy to talk to and she explains everything. Very knowledgeable and informative
She's listens and cares
The first thing my husband said when he arrived home from your visit is “Dr. Brennan actually listened to me”. This is the highest praise we can give you. My husband is an old school, slow talking Texan that most Doctors don’t have time to let him articulate his needs. Thank you so much Dr. Brennan.
Dr. Brennan always takes time to discuss our concerns with my cousin (patient) & I. She always has my cousin’s best interest in mind and makes recommendations for her based on her advanced age, quality of life & safety needs.
Really great doctor, she explains things clearly and always willing to help her patients I’m lucky to have them
She takes time to listen and really cares about her patients.
She’s great and compassionate