We can be reached at either of our locations in North Dallas Mckinney Office: 4541 Medical Center Dr, Ste 800, Mckinney, TX 75069 Office Hours: Monday – Thursday – 9AM to 5PM Friday – 9AM to 12PM Closed daily for lunch -12PM to 1PM Phone: 972-566-Heart(4327), 1-877-7Syncope, 214-504-9942 Fax: 214-504-9940 email: info@thbc.us