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.
Courteous Professional. Easy to talk to. Takes time to explain
(3 days ago)
Aug-2026
Very thoughtful
(3 days ago)
Aug-2026
Excellent doctor who is knowledgeable, attentive, and professional. She definitely takes the time to listen to concerns and make sure you understand your care and treatment options.
(4 days ago)
Aug-2026
She is very thorough and informative I’m glad to have her to be the one to take care of my heart ❤️.Thank You Dr. Brennan!!!
(4 days ago)
Aug-2026
My appointment went quickly! The staff is super nice and so is my doctor. She listens to concerns and addresses them accordingly! Definitely would recommend them.
(5 days ago)
Aug-2026
She made sure all my concerns and questions were answered
(1 week ago)
Aug-2026
Very professional. Listened to everything I had to say and gave excellent answers to my questions. She seemed very caring and knowledgeable.
(1 week ago)
Aug-2026
She was very helpful a great doctor thank you
(1 week ago)
Aug-2026
She takes her time to explain to you. She also listens to what her patients has to say, I would definitely recommend Dr. Brennan.
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)
Courteous Professional. Easy to talk to. Takes time to explain
Very thoughtful
Excellent doctor who is knowledgeable, attentive, and professional. She definitely takes the time to listen to concerns and make sure you understand your care and treatment options.
She is very thorough and informative I’m glad to have her to be the one to take care of my heart ❤️.Thank You Dr. Brennan!!!
My appointment went quickly! The staff is super nice and so is my doctor. She listens to concerns and addresses them accordingly! Definitely would recommend them.
She made sure all my concerns and questions were answered
Very professional. Listened to everything I had to say and gave excellent answers to my questions. She seemed very caring and knowledgeable.
She was very helpful a great doctor thank you
She takes her time to explain to you. She also listens to what her patients has to say, I would definitely recommend Dr. Brennan.
Very informative and she sits and listens