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Welcome to Our Practice

Signet Heart Group’s mission is to provide compassionate, comprehensive, and high-quality care for a wide range of cardiac and vascular conditions.

What's New InCardiology?

Awake CABG

Coronary artery bypass graft (CABG) is a surgical procedure performed to bypass a blocked artery of the heart. It involves incising a small part of a blood vessel (most commonly a vein from the leg) and using it as a graft.


  • Award 2018
  • Award 2019
  • Award 2020
  • Award 2021

Patient Reviews

  • David F. Davis, M.D
  • Nikhil Joshi, M.D
  • Tariq M. Yousuf, M.D
    Verified Patient
  • I have used Dr Davis for years and highly recommend him. He NEVER rushes me out of his office.
    Verified Patient
  • Dr. Davis gives it to you straight and answers all your questions. He's caring and takes care of you. I reccommend him ...
    Verified Patient
  • Dr. Joshi always does a very good exam. He makes you feel very comfortable about asking questions and he explains...
  • I first met Dr. Joshi 11 years ago when my 39 year old daughter had a massive heart attack. He was the doctor on call a...
    Sue J
  • After surgery I had a small problem and Dr Joshi took immediate action to solve the problem!! Very attentive to his pat...
    Verified Patient
  • I couldn’t ask for a cardiologist that is as professional and helpful as Dr. Yousuf. I had blockages in both legs, very little blood flow, and he wa...
  • Dr. Yousuf is wonderful – Fantastic Cardiologist. Referred other family members and friends to him. He has done a stent in my heart with great resul...
    Gloria White
  • My husband was in A-fib two weeks ago came into see Dr. Yousuf and new meds were started that got him out of A-fib, therefore he did not have to shock...
    Jimmy Daniel


Signet Heart Group
2800 North Highway 75
Sherman, Texas 75090


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Practice Hours: M-F 8am – 5pm

  • American Board of Internal Medicine
  • National Board of Echocardiography
  • Certification Board of Nuclear Cardiology
  • American Board of Vascular Medicine