Key result
The sum of abnormally low QRST area values significantly correlated with LV mass in patients with aortic stenosis (r=0.83, p<0.01) or aortic regurgitation (r=0.69, p<0.05), but not in HCM.
Why the study?
Does the body surface distribution of abnormally low QRST areas correlate with the severity of left ventricular hypertrophy in patients with aortic valve disease or hypertrophic cardiomyopathy?
Population
94 subjects, including 44 patients with left ventricular hypertrophy and precordial negative T waves…
Comparison
QRST isointegral maps constructed from 87 body… vs Normal control subjects (n=50)
Design
Cross-sectional
Authors
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QRST maps associate with LV mass in aortic valve disease; hypothesis-generating for repolarization assessment in HCM.
Observational (n=94)
Does the body surface distribution of abnormally low QRST areas correlate with the severity of left ventricular hypertrophy in patients with aortic valve disease or hypertrophic cardiomyopathy?
Effect estimate: r = 0.83 (AS), r = 0.69 (AR)
p-value: p=<0.01 (AS), <0.05 (AR)
QRST isointegral departure maps can provide ECG evidence of LV mass in patients with aortic valve disease and indicate a greater disparity of repolarization in hypertrophic cardiomyopathy.
Hirai et al. (1991) conducted an observational in Left ventricular hypertrophy (n=94). QRST isointegral maps vs. Normal subjects was evaluated on Correlation between the sum of abnormally low QRST area values (sigma QRST) and echocardiographic left ventricular mass (r = 0.83 (AS), r = 0.69 (AR), p=<0.01 (AS), <0.05 (AR)). The sum of abnormally low QRST area values significantly correlated with LV mass in patients with aortic stenosis (r=0.83, p<0.01) or aortic regurgitation (r=0.69, p<0.05), but not in HCM.
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