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.
Dr Brennan takes the time to address your questions and concerns
(3 days ago)
Aug-2026
Very professional and helpful answering all my questions.
(3 days ago)
Aug-2026
love her. She is so caring and nice and listens to what I have to say.
(4 days ago)
Aug-2026
Looking for a cardiologist that LISTENS and EXPLAINS and CARES?
This is your doctor. Love her
(6 days ago)
Aug-2026
Dr. Brennan was very thorough, easy to talk to, explained so you can understand. answered all my questions, love my doctor!
(1 week ago)
Jul-2026
She is a very good doctor
(1 week ago)
Jul-2026
I cannot say enough wonderful things about my heart doctor. She is truly amazing—knowledgeable, compassionate, and dedicated. Every visit, she takes the time to answer my questions thoroughly and with patience, making sure I feel informed and cared for. What stands out most is her genuine concern for her patients; you can feel that she truly loves what she does and cares deeply about the people she treats. Her kindness and expertise give me so much peace of mind. I am grateful to have her as my doctor and highly recommend her to anyone seeking exceptional cardiovascular care.
(2 weeks ago)
Jul-2026
She gave me a lot of information and eased my mind. Very nice person.
(2 weeks ago)
Jul-2026
Very polite, understanding, and attentive
(2 weeks ago)
Jul-2026
Very clear and concise with explaining everything.
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)
Dr Brennan takes the time to address your questions and concerns
Very professional and helpful answering all my questions.
love her. She is so caring and nice and listens to what I have to say.
Looking for a cardiologist that LISTENS and EXPLAINS and CARES? This is your doctor. Love her
Dr. Brennan was very thorough, easy to talk to, explained so you can understand. answered all my questions, love my doctor!
She is a very good doctor
I cannot say enough wonderful things about my heart doctor. She is truly amazing—knowledgeable, compassionate, and dedicated. Every visit, she takes the time to answer my questions thoroughly and with patience, making sure I feel informed and cared for. What stands out most is her genuine concern for her patients; you can feel that she truly loves what she does and cares deeply about the people she treats. Her kindness and expertise give me so much peace of mind. I am grateful to have her as my doctor and highly recommend her to anyone seeking exceptional cardiovascular care.
She gave me a lot of information and eased my mind. Very nice person.
Very polite, understanding, and attentive
Very clear and concise with explaining everything.