Erroneous Left ventricular cavity size measurements on myocardial perfusion SPECT resulting from transient arrhythmias.
Transient ischemic dilatation (TID) of the left ventricle during stress on myocardial perfusion imaging is a sign of severe coronary artery disease. Factors other than ischemia can transiently influence left ventricular size, however, and TID ratios can be misleading if these factors are not properly identified. We describe 4 cases of stress-rest Tc-99m sestamibi SPECT myocardial perfusion imaging in which both abnormally high and low TID ratios were seen as a result of the presence of transient supraventricular tachyarrhythmias that reduced cardiac filling time and corresponding left ventricular volumes.
Kirkpatrick
Iain D C
ID
Department of Radiology, University of Manitoba, Winnipeg, Manitoba, Canada. kirkpatrick_iain@hotmail.com
Leslie
William D
WD
D000368:Aged; D001145:Arrhythmias, Cardiac / Q000150:complications / Q000000981:diagnostic imaging*; D002306:Cardiac Volume; D003951:Diagnostic Errors / Q000379:methods*; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging / Q000209:etiology; D005260:Female; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D019275:Radiopharmaceuticals; D017256:Technetium Tc 99m Sestamibi; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000209:etiology
D019275:Radiopharmaceuticals; D017256:Technetium Tc 99m Sestamibi