Dr. John Grehan, Heart Valve Surgeon

Hello! My name is Dr. John Grehan and I am a cardiac surgeon having graduated from University of Minnesota in 1995. To date, I have performed approximately 1,000 cardiac surgeries, of which 600 involved heart valve procedures. I regularly perform surgery at United Heart & Vascular Clinic. Read more...

26 Patient Reviews for Dr. Grehan

"Dr. Grehan was very informative before and after the surgery. I highly recommend him."

-- Kent Christopherson, heart valve surgery patient

"I cannot say enough about Dr. Grehan and his entire surgical & ICU team.

My family was kept informed throughout the surgery and the ICU team went above and beyond in caring for me and thank goodness they all quickly caught onto my sarcasm is a sign of love.

No doubt I placed my heart and life in the best hands. Thanks again Dr. Grehan!"

-- Kathy Wedemeyer, Aortic Valve, Valve Replacement, Root Replacement, 12/19/2016

> See 24 more patient testimonials

My Specialities & Interests

Specific to heart valve surgery, you should know that I have several specialties including:

  • Mitral valve repair surgery
  • Aortic root surgery for conditions including aneurysms
  • Minimally invasive valve surgery

In addition, I have research and clinical interests specific to:

  • Surgical treatment of atrial fibrillation
  • Mitral valve disease
  • Thoracic aortic disease

Education, Training & Certificates

Dr. John Grehan, heart surgeon, graduated from University of Minnesota in 1995.

In 2004, Dr. Grehan completed a General Surgery Residency at the University of Minnesota. He then attended the University of Michigan in Ann Arbor, Michigan for his Cardiothoracic Surgical Residency successfully completing this in 2006.

Dr. Grehan is board certified by both the American Board of Surgery and the American Board of Thoracic Surgery.

Additionally, Dr. Grehan is a Fellow of the American College of Surgeons and a member of the Society of Thoracic Surgeons.

Dr. John Grehan

United Heart & Vascular Clinic
225 North Smith Avenue
Saint Paul, MN 55102
(888) 513-2749

Download Surgeon Guide
Have A Question? Call Us at (888) 725-4311

P.O. Box 4049
Redondo Beach, CA 90277
Phone: (888) 725-4311