TY - JOUR
T1 - Transient Ischemic Dilation Ratio of the Left Ventricle Is a Significant Predictor of Future Cardiac Events in Patients with Otherwise Normal Myocardial Perfusion SPECT
AU - Abidov, Aiden
AU - Bax, Jeroen J.
AU - Hayes, Sean W.
AU - Hachamovitch, Rory
AU - Cohen, Ishac
AU - Gerlach, James
AU - Kang, Xingping
AU - Friedman, John D.
AU - Germano, Guido
AU - Berman, Daniel S.
PY - 2003/11/19
Y1 - 2003/11/19
N2 - OBJECTIVES: This study evaluated the prognostic value of transient ischemic dilation (TID) of the left ventricle (LV) in patients with normal stress myocardial perfusion single photon emission computed tomography (MPS). BACKGROUND: The prognostic value of TID in patients with an otherwise normal MPS has not been defined. METHODS We identified 1,560 patients who had normal stress MPS (436 vasodilator and 1,124 exercise stress), and no rest LV enlargement (Population 1) and followed up for 2.30 ± 0.67 years for hard events (HE) (cardiac death or myocardial infarction) and soft events (SE) (revascularization). Prediction of first HE or SE (total events [TE]) was evaluated by multivariable Cox analysis, which was also applied to a broader group of 2,037 patients (including patients with minimal defects (Population 2). RESULTS: In Population 1, there were 13 HE, 36 SE, and 42 TE. Patients in the highest TID quartile (TID ≥1.21) had a higher TE rate than others, regardless of stress type. By multivariable analysis, highest TID quartile was predictive of TE (p = 0.008). Other independent predictors of TE were age, typical angina, and diabetes. In Population 2, TID was also predictive of TE. CONCLUSIONS: An entirely normal stress MPS study does not always imply an excellent prognosis. In patients with otherwise normal MPS, TID is an independent and incremental prognostic marker of TE even after significant clinical variables - age, typical angina, and diabetes - are accounted for. When TID is present, caution in making low-risk prognostic statements may be warranted, especially in patients with typical angina, the elderly, and diabetics. Our findings also appear to apply to the broader population of "normal" MPS, which included patients with minimal perfusion defects.
AB - OBJECTIVES: This study evaluated the prognostic value of transient ischemic dilation (TID) of the left ventricle (LV) in patients with normal stress myocardial perfusion single photon emission computed tomography (MPS). BACKGROUND: The prognostic value of TID in patients with an otherwise normal MPS has not been defined. METHODS We identified 1,560 patients who had normal stress MPS (436 vasodilator and 1,124 exercise stress), and no rest LV enlargement (Population 1) and followed up for 2.30 ± 0.67 years for hard events (HE) (cardiac death or myocardial infarction) and soft events (SE) (revascularization). Prediction of first HE or SE (total events [TE]) was evaluated by multivariable Cox analysis, which was also applied to a broader group of 2,037 patients (including patients with minimal defects (Population 2). RESULTS: In Population 1, there were 13 HE, 36 SE, and 42 TE. Patients in the highest TID quartile (TID ≥1.21) had a higher TE rate than others, regardless of stress type. By multivariable analysis, highest TID quartile was predictive of TE (p = 0.008). Other independent predictors of TE were age, typical angina, and diabetes. In Population 2, TID was also predictive of TE. CONCLUSIONS: An entirely normal stress MPS study does not always imply an excellent prognosis. In patients with otherwise normal MPS, TID is an independent and incremental prognostic marker of TE even after significant clinical variables - age, typical angina, and diabetes - are accounted for. When TID is present, caution in making low-risk prognostic statements may be warranted, especially in patients with typical angina, the elderly, and diabetics. Our findings also appear to apply to the broader population of "normal" MPS, which included patients with minimal perfusion defects.
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U2 - 10.1016/j.jacc.2003.07.010
DO - 10.1016/j.jacc.2003.07.010
M3 - Article
C2 - 14642694
AN - SCOPUS:10744231666
SN - 0735-1097
VL - 42
SP - 1818
EP - 1825
JO - Journal of the American College of Cardiology
JF - Journal of the American College of Cardiology
IS - 10
ER -