Don performs a graded exercise test and 2mm of down sloping ST segment depression is noted in 4 leads during stage 2 of Bruce protocol. His ST segment depression finally resolves after 6 minutes of recovery. Bill also undergoes an exercise stress test and 1mm of horizontal ST segment depression is noted in only 2 leads during stage 4 of the Bruce protocol. Bill’s ST segment depression resolves immediately after he is put into recovery.
a) Who is experiencing a greater magnitude of ischemia, Don or Bill?
b) Why?.
Mr. Don having the higher magnitude of ischemia because it's exact relationship to regional myocardial blood flow has not clarified and without collateral perfussion
Don performs a graded exercise test and 2mm of down sloping ST segment depression is noted...