I recently had a nuclear stress test due to experiencing some chest pain. I had a stent put in last August. Below is the narrative of the results:
Procedure Narrative : Treadmill exercise testing was performed using the
Bruce protocol. The patient exercised for 12 min, to protocol stage 4, to a
maximal work rate of 12.5mets. Exercise was terminated due to fatigue.
Maximal heart rate during stress was 152bpm (93% of maximal predicted heart
rate). The maximal predicted heart rate was 163bpm.The target heart rate was
achieved. The heart rate response to stress is normal. There is a normal
resting blood pressure with an appropriate response to stress. The
rate-pressure product for the peak heart rate and blood pressure was 25536mm
Hg/min. Functional capacity is above normal (greater than 20%).
Electrocardiographic Data: The resting EKG demonstrates 67bpm heart rate,
with Normal sinus rhythm with incomplete right bundle branch block.
The EKG revealed no arrhythmia. The patient was asymptomatic during the
test. This is a negative stress EKG test for ST segment depression.
SPECT Study: While at rest the patient received 10.6mCi Tc[99m]-sestamibi
intravenously Gamma camera imaging was performed aproximately 30 minutes
after isotope injection using 180 degree SPECT technique. While at stress
the patient received 31.9mCi Tc[99m]-sestamibi intravenously Gamma camera
imaging was performed aproximately 30 minutes after isotope injection using
180 degree gated SPECT technique with wall motion and ejection fraction
Gated SPECT: LV global systolic function is normal. The ejection
fraction is greater than 70%.
Myocardial Perfusion Imaging: The TID ratio is 0.82. There is a small,
mild, partially reversible defect involving the basal inferior wall(s), due
to diaphragm attenuation. LV myocardial perfusion is otherwise normal. There
is no evidence of ischemia.
- Gated SPECT: LV global systolic function is normal. The ejection fraction
is greater than 70%.
- Stress: Functional capacity is above normal (greater than 20%).
- Normal nuclear perfusion study.
- There is no evidence of myocardial ischemia.
- There is no evidence of myocardial infarction.
I don't understand the TID ratio - is it good, bad indifferent, etc. Also, don't understand the partially reversible defect that is listed in the MPI.
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