I am Dr Tryzelaar and a retired cardio thoracic surgeon. After a life-long career in the treatment of heart diseases, I created this web site to help you with your cardiac disease questions. This is what you'll get:





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Ask the Doctor your cardiac related questions today!

Concerned about Adenosine stress test scheduled for 12/15. FDA warnings are frightening me considering I have cardiac instability, i.e., atril fib, fairly severe shortness of breath, suspected congestive heart failure having retained excess fluid in feet and lower legs for some time, fatigue....
Exercise stress testing is the most widely used method to test a patient for coronary artery disease (CAD). For patients unable to exercise, pharmacologic stress testing is an alternative with drugs like Persantine, Adenosine and Dobutamine. This type of stress testing is used in...


We recorded a new Ask Dr T Live Video Session on 5/3/14


In it, I answered two of your questions.  about ICDs and "Diet & Exercise". 

If you want to participate in the next session, please answer  a few questions from the form you can find here:










Reports, medical articles,
and industry news information
for health care professionals.

Surgical competence requires a complex set of interdependent roles and abilities that include psychomotor, cognitive,...
Surgical Anatomy Lecture, Tufts University School of Medicine GI Tract Embryology Joan F. Tryzelaar, MD, FACS, FACCP 1/...
Surgical Anatomy Lecture, Tufts University School of Medicine Embryology of Body Cavities Joan F. Tryzelaar, MD, FACS,...