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Phase analysis of radionuclide angiography in acute myocardial infarction
D Bonaduce1, G Morgano, M Petretta
1Institute of Internal Medicine, Cardiology, Cardiovascular Surgery, 2nd School of Medicine, Naples, Italy.
Insights
Standard deviation of left ventricular phase distribution (SDP-LV) shows high accuracy in assessing acute myocardial infarction (AMI) compared to ejection fraction (EF) and peak filling rate (PFR). SDP-LV offers a valuable diagnostic tool for AMI patients.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Imaging
Background:
- Acute myocardial infarction (AMI) diagnosis relies on various cardiac function parameters.
- Assessing left ventricular (LV) function post-AMI is crucial for prognosis and management.
- Radionuclide angiography (RNA) provides functional information about the LV.
Purpose of the Study:
- To evaluate the diagnostic performance of standard deviation of the histogram of left ventricular phase distribution (SDP-LV) in acute myocardial infarction (AMI).
- To compare the sensitivity, specificity, and accuracy of SDP-LV against ejection fraction (EF) and peak filling rate (PFR).
Main Methods:
- Studied 75 AMI patients (Group A: anterior/anteroseptal; Group I: inferior/inferolateral/posterior necrosis).
- Included 16 controls and 29 coronary artery disease patients with normal kinesis for comparison.
- Utilized radionuclide angiography (RNA) to obtain SDP-LV measurements.
Main Results:
- SDP-LV demonstrated superior accuracy (87.5%) compared to EF (53.8%) and PFR (67.3%).
- SDP-LV specificity (89.6%) was comparable to EF (93.1%) and better than PFR (58.6%).
- Higher mean SDP-LV was observed in anterior necrosis and with lower EF, indicating impaired function.
Conclusions:
- SDP-LV is a highly accurate and specific parameter for diagnosing AMI.
- SDP-LV shows potential as a valuable tool in the assessment of left ventricular function in AMI patients.
- SDP-LV performance is superior to EF and PFR in certain diagnostic aspects.
Abstract:
Standard deviation of the histogram of left ventricular phase distribution (SDP-LV) obtained by radionuclide angiography (RNA) was studied in 75 acute myocardial infarction (AMI) patients, 37 with anterior or anteroseptal (Group A) and 38 with inferior, inferolateral or posterior necrosis (Group I). In order to evaluate sensitivity, specificity and accuracy of SDP-LV compared to ejection fraction (EF) and peak filling rate (PFR), 16 controls and 29 patients with coronary artery disease with normal kinesis proved by angiography were studied. Patients were also compared according to normal or abnormal EF and PFR. Sensitivity of PFR was better than those of EF and PFR (86.6% vs 38.7% and 70.6%, respectively). Specificity of SDP-LV was 89.6%, better than that of PFR (58.6%), but just less than that of EF (93.1%). The accuracy of SDP-LV turned out to be better than those of EF and PFR (87.5% vs 53.8% and 67.3%, respectively). Ejection fraction correlated with SDP-LV in the total study population (r = -0.54, P less than 0.001), and in Groups A (r = -0.44, P less than 0.01) and I (r = -0.43, P less than 0.05); SDP-LV correlated with PFR in the total population (r = -0.35, P less than 0.05), but not in Group A or I. Mean SDP-LV was higher in Group A than I and in patients with lower EF; no difference was found among patients with different PFR values.(ABSTRACT TRUNCATED AT 250 WORDS)