Key result
Exercise body surface mapping correlates with positive stress thallium scans in ~88% of HCM patients.
Why the study?
The mechanisms responsible for ischemic changes in patients with LVH, especially those with HCM, are not clear and require evaluation of exercise-induced myocardial ischemia using body surface maps compared with stress thallium scans.
Do exercise body surface maps correlate with stress thallium scans for identifying exercise-induced myocardial ischemia in patients with LVH?
Comparison
Exercise QRST area maps (S-maps) vs stress thallium (Tl) scan
Design
Observational comparative study
Authors
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May aid ischemia detection in HCM with LVH; leaves open reliability in essential hypertension pending validation.
Observational (n=44)
Do exercise body surface maps correlate with stress thallium scans for identifying exercise-induced myocardial ischemia in patients with LVH?
Exercise QRST area maps may be useful in identifying exercise-induced myocardial ischemia in patients with HCM and LVH, but may not be reliable in patients with essential hypertension due to other influencing factors.
Hidenori Hagihara (1990) conducted an observational in Left ventricular hypertrophy with ST-T changes (n=44). Exercise body surface maps (QRST area maps) vs. Stress thallium scan (SPECT) was evaluated on Identification of exercise-induced myocardial ischemia (positive findings on stress thallium scan). Exercise body surface maps correlated with positive stress thallium scans in 88% of hypertrophic cardiomyopathy patients with wide precordial negative changes, but not in essential hypertension patients.
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