OBJECTIVE The aim of this study was to investigate the most robust predictor of myocardial viability among stress/rest reversibility (coronary flow reserve [CFR] impairment), (201)Tl perfusion status at rest, (201)Tl 24 hours redistribution and systolic wall thickening of (99m)Tc-methoxyisobutylisonitrile using a dual isotope gated myocardial perfusion single-photon emission computed tomography...

OBJECTIVE Gated myocardial perfusion single-photon emission computed tomography (GSPECT) has been established as an accurate and reproducible diagnostic and prognostic technique for the assessment of myocardial perfusion and function. Respiratory motion is among the major factors that may affect the quality of myocardial perfusion imaging (MPI) and consequently the accuracy of the examination. ...

This study evaluated the relationship between the location of the most severe coronary artery stenosis and the subsequent acute myocardial infarction (AMI). Methods: Of 1590 patients who were admitted with a diagnosis of AMI, we identified 44 patients who had undergone previous myocardial perfusion SPECT. Thirty-one of these patients also had previous coronary angiography. The relationshi...

It is likely that clinical applications of ECG-gated single-photon emission computed tomography (SPECT) are established in nuclear cardiology practice because of the improved diagnostic accuracy of gated SPECT imaging for the detection of coronary artery disease and because this technique enables not only simultaneous assessment of myocardial perfusion and function but also improvement of risk ...

Background: proper assessment of patients with ischemic cardiomyopathy is a key determinant for management other investigations, improving the patient’s quality life and reducing future cardiac events. This study was conducted to evaluate value myocardial MIBI washout rate using delayed resting perfusion imaging in limited resources countries. Patients Methods: this prospective included 86 (64 ...

Soft-tissue attenuation artifacts generally appear as fixed perfusion-scan defects. Gated 99mTc-tetrofosmin SPECT may help differentiate myocardial infarction (MI) from artifacts, as fixed defects with decreased function (wall motion and thickening) probably represent MI, whereas attenuation artifacts represent preserved function. Methods: Ungated stress and gated rest 99mTc-tetrofosmin SPECT w...

Introduction: Myocardial perfusion imaging using gated SPECT and phase analysis is an effective tool in evaluation of mechanical dyssynchrony. The purpose of this study was to determine the normal ranges of global and regional phase parameters. Methods: A total of 100 patients with normal resting and stress electrocardiograms, low pretest likelihood for c...

UNLABELLED Soft-tissue attenuation artifacts generally appear as fixed perfusion-scan defects. Gated (99m)Tc-tetrofosmin SPECT may help differentiate myocardial infarction (MI) from artifacts, as fixed defects with decreased function (wall motion and thickening) probably represent MI, whereas attenuation artifacts represent preserved function. METHODS Ungated stress and gated rest (99m)Tc-tet...

coronary heart disease (cad) is the leading cause of death specially among elderly. coronary angiography is the best diagnostic method in the patients, but is unfortunately an invasive procedure with its inherent risks. myocardial perfusion scan is a noninvasive and sensitive method for evaluation of cad and is suggested by many investigators in recent years. in this study, 64 patients who had ...

BACKGROUND The phenomenon of reversible impairment in LV function has been well described and is known as myocardial stunning. OBJECTIVE Thallium-201 myocardial perfusion gated SPECT was used to evaluate myocardial stunning and its incremental prognostic value in patients with coronary artery disease. PATIENTS AND METHODS Fifty-six patients (aged 63+/-11 years) with coronary artery disease ...