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...

23 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

"Dr. Grehan is the best heart surgeon in the world - can't say enough good things about him and his colleagues. He saved my aortic valve during an aortic root replacement due to an aneurysm. He is highly educated and very skilled but still remains humble and easy to understand. He explained the process from beginning to end. He answered every question with sincerity, and gives credit to his team. He saved my life, and gave my family a new beginning."

-- Tim Peterson, Aortic Valve, Valve Repair, 04/25/2016

> See 21 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

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