Left ventricular shape index and eccentricity index with ECG-gated Nitrogen-13 ammonia PET/CT in patients with myocardial infarction, ischemia, and normal perfusion.
J Nucl Cardiol
; 36: 101862, 2024 Jun.
Article
in En
| MEDLINE
| ID: mdl-38608861
ABSTRACT
BACKGROUND:
LV geometry with shape index (SI) and eccentricity index (EI) measured by myocardial perfusion positron emission tomography/computed tomography (PET/CT) may allow the evaluation of left ventricular (LV) adverse remodeling. This first study aims to explore the relationship of SI and EI values acquired by Nitrogen-13 ammonia PET/CT in patients with normal perfusion, ischemia, and myocardial infarction. And evaluate the correlations between the variables of LV geometry, and with the variables of LV function. METHODS ANDRESULTS:
One hundred and forty patients who underwent an electrocardiogram (ECG)-gated PET/CT were selected and classified into 4 groups according to ischemia or infarction burden (normal perfusion, mild ischemia, moderate-severe ischemia, and infarction). The variables were automatically retrieved using dedicated software (QPS/QGS; Cedars-Sinai, Los Angeles, CA, USA). On multicomparison analysis (one-way ANOVA and Dunnett's Test), subjects in the infarction group had significant higher values of SI end-diastolic rest (P < 0.001), and stress (P = 0.003), SI end-systolic rest (P = 0.002) and stress (P < 0.001) as well as statistically significant lower values of EI rest (P < 0.001) and stress (P < 0.001) when compared with all other groups. Regarding Pearson correlation, in the infarcted group all the variables of SI and EI were significantly correlated (P < 0.001) with strong correlation coefficients (>0.60). SI end-systolic correlated significantly with the variables of LV function independently of the group of patients (P < 0.05).CONCLUSIONS:
Shape and eccentricity indices differ in patients with myocardial infarction as compared to patients with ischemia or normal perfusion. This encourage further research in their potential for detecting LV adverse remodeling.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Myocardial Ischemia
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Electrocardiography
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Myocardial Perfusion Imaging
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Positron Emission Tomography Computed Tomography
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Heart Ventricles
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Ammonia
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Myocardial Infarction
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Nitrogen Radioisotopes
Limits:
Aged
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Female
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Humans
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Male
/
Middle aged
Language:
En
Journal:
J Nucl Cardiol
Journal subject:
CARDIOLOGIA
Year:
2024
Document type:
Article
Country of publication: