PMID: 589921Nov 1, 1977

99Tcm-Sn pyrophosphate scanning in suspected acute myocardial infarction using a mobile rectilinear scanner

Clinical Radiology
E J WakleyG E Staddon

Abstract

99Tcm stannous pyrophosphate injected intravenously gives a positive image of freshly damaged myocardium but not of normal or scarred myocardium. It is safe, cheap and generally available. One hundred and forty patients admitted to hospital with possible myocardial infarction were scanned with a mobile rectilinear scanner of the type available in most district general hospitals. When the diagnosis of infarction was definite on clinical, electrocardiographic and enzyme criteria the anterior scan was positive in 31 out of 36 patients (86%); and when it was probable, the scan was positive in 28 out of 41 (68%) and when it was doubtful the scan was positive in 23 out of 63 (37%). The optimum time for scanning was between the second and seventh days. Pyrophosphate scanning is a very valuable investigation even though it is not an absolute discriminator of myocardial infarction. It is useful in assessing patients with atypical or doubtful symptoms of infarction where the ECG is already abnormal or where there are other causes of raised enzyme concentrations. False negative scans are not common, but a negative scan does not outweigh strong alternative evidence of infarction. Positive scans occur in some patients with unstable angina w...Continue Reading

References

Jan 1, 1976·The British Journal of Radiology·J P MurrayD O'Beirn
Apr 1, 1976·The British Journal of Radiology·P B DunscombeR G Dale
Apr 1, 1976·The British Journal of Radiology·M E O'Connell, H Sutton
May 1, 1975·The British Journal of Radiology·M V Merrick
Apr 1, 1971·Radiology·G Subramanian, J G McAfee

Related Concepts

Myocardial Infarction
Scintiphotography
Technetium 99m
Tin Pyrophosphates

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