Ischemic and viable myocardium in patients with Non–Q-Wave or Q-Wave myocardial infarction and left ventricular dysfunction
A clinical study using positron emission tomography, echocardiography, and electrocardiography
Hua Yang, MD*,
Min Pu, MD, FACC*,*,
David Rodriguez, MD*,
Donald Underwood, MD, FACC*,
Brian P. Griffin, MD, FACC*,
Vidyasagar Kalahasti, MD*,
James D. Thomas, MD, FACC* and
Richard C. Brunken, MD, FACC
* Department of Cardiology, Cleveland, Ohio, USA
Department of Nuclear Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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Figure 1 Illustration of the 24-segment model in the positron emission tomographic study. Left ventricle was divided into 24 segments with four principal regions: septal (S), anterior (A), lateral (L), and inferior (I) regions. Each principal region was sliced into basal, mid-, distal, and apical layers in the vertical and horizontal views. The segments between the principal regions were anterior septum (as), anterior lateral (al), inferior lateral (il), and inferior septum (is) as shown in the short-axis view. The basal septum (horizontal axis) was not accounted as a myocardial segment because of nonmyocardial membrane. Instead, the apical segment was accounted as the 24th segment.
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Figure 2 Comparison of ischemic viable myocardium and myocardial scar between the patients with non–Q-wave myocardial infarction (NQMI) and those with Q-wave myocardial infarction (QMI).
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