Key result
99mTc-MIBI washout linked to ~130% greater functional improvement on dobutamine stress echocardiography.
Why the study?
Proper assessment of patients with ischemic cardiomyopathy is crucial for management, improving quality of life, and reducing future cardiac events, especially in limited resource countries.
Observational (n=86)
No
Absolute Event Rate: 75% vs 33%
p-value: p=<0.02
Supports 99mTc-MIBI washout for viability assessment; hypothesis-generating and should not yet change practice.
Background: proper assessment of patients with ischemic cardiomyopathy is a key determinant for management with other investigations, improving the patient’s quality of life and reducing future cardiac events. This study was conducted to evaluate the value of myocardial MIBI washout rate using delayed resting myocardial perfusion imaging in patients with ischemic cardiomyopathy in limited resources countries. Patients and Methods: this prospective study included 86 patients (64 males (74.4%) & 22 females (25.6%) with ejection fraction less than 35%. The mean age was 56.7 ± 9.4 years, all patients underwent ECG-gated single-photon emission computed tomography (SPECT) technetium-99m MIBI myocardial perfusion imaging (99mTc MIBI).
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Zaki et al. (2022) conducted an observational in Ischemic Cardiomyopathy (n=86). Myocardial 99mTc-MIBI Washout rate vs. Segments without washout was evaluated on Functional improvement on high dose dobutamine stress echocardiography (p=<0.02). Myocardial segments with 99mTc-MIBI washout showed a higher rate of functional improvement on dobutamine stress echocardiography compared to segments without washout (75% vs 33%, p<0.02).
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