1. Thallium Stress Protocols
Myocardial Perfusion
Thallium Stress Protocols

2. One Day Stress/Rest 201Thallium
Treadmill
One Day Stress/Rest 201Thallium
Treadmill
Target = 85% maximum heart rate
Inject Tl-201 immediately followed by 10cc saline flush
Continue treadmill
1-2 minutes
Image begins minutes post stress dose
Patient from stress portion wait time is hours
May image when patient returns or
reinject 1 mCi
Tl-201 for rest
Image begins
30-60 post
rest reinjection
For a thallium stress test, the stress portion must always be done first and imaging whether treadmill or chemical must be started ASAP due to redistribution of the thallium.
With treadmill for any radiopharmaceutical the heart rate should be allowed to return to baseline in order to avoid what is called the cardiac creep.