Sustained right ventricular dyskinesis complicated by right ventricular infarction.
We encountered a 66-yr-old man with acute left inferior and right ventricular infarction. Tomographic radionuclide ventriculography and Fourier analysis clearly demonstrated reduced wall motion in the inferior walls of both ventricles and markedly delayed phase angles in the inferior right ventricular segment, indicating dyskinesis, which was confirmed by two-dimensional echocardiography and contrast right ventriculography. Four years later, right ventricular dyskinesis was still present and corresponded to a right ventricular perfusion defect on 99mTc-labeled tetrofosmin tomogram. Right ventricular imaging with tomographic radionuclide ventriculography with Fourier analysis and 99mTc-labeled myocardial tomography demonstrates that, even after improved global function and hemodynamics, right ventricular dyskinesis related to right ventricular perfusion defect can be sustained for several years. Thus, these imaging techniques may contribute to diagnosing right ventricular infarction and investigating the pathophysiology.
Nakata
T
T
Second Department of Internal Medicine, Sapporo Medical University School of Medicine, Japan.
Hashimoto
A
A
Kuno
A
A
Tsuchihashi
K
K
Yonekura
S
S
Shimamoto
K
K
D000368:Aged; D004452:Echocardiography; D015637:Gated Blood-Pool Imaging; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D009203:Myocardial Infarction / Q000150:complications* / Q000000981:diagnostic imaging; D018497:Ventricular Dysfunction, Right / Q000150:complications* / Q000000981:diagnostic imaging