Rest and nitroglycerine 99mTc myocardial viability scan

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Rest images were obtained after intravenous administration of 8 mCi of 99mTc. 25 mCi of 99mTc was injected after 5 mg of sublingual nitroglycerine hours later and rest gated images obtained. Exercise was deferred in view of clinical background of triple vessel disease and severe left ventricular dysfunction. Rest images showed a moderately dilated left ventricle and no pulmonary uptake of tracer. Perfusion abnormality was noted in the inferior wall and inferolateral segments. There was some improvement of perfusion with nitroglycerine. Gated SPECT analysis showed global hyokinesia with a global ejection fraction of about 23%.

Anterior and inferior wall infarct on 99m Tc myocardial perfusion imaging

Anterior and inferior wall infarct on 99m Tc myocardial perfusion imaging. 25 mci of 99mTc tetrofosmin was administered for stress imaging and 8 mci for rest imaging. This person was asymptomatic at 9.1 METS of Bruce protocol on treadmill exercise. Lateral wall is seen to be well perfused and there is no infarct in the lateral wall. Non transmural infarct is seen in the anterior wall, septum and inferior wall. There is very little reversible ischemia. Hence there may not be any benefit from revascularisation of the coronary artery involved.

Anterior and inferior wall infarct on 99m Tc myocardial perfusion imaging -full

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