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Comparative Study
Journal Article
Systolic dysfunction: correlation of acoustic cardiography with Doppler echocardiography.
Congestive Heart Failure 2006 July
For detection of left ventricular (LV) systolic dysfunction in the outpatient setting, simultaneous electrocardiographic and heart sound data have been shown to be helpful. In 161 patients with suspected or known cardiac disease, echocardiography and acoustic cardiography were performed. Acoustic cardiographic parameters correlated to echocardiography included: presence or absence of S3, electromechanical activation time (EMAT), LV systolic time (LVST), and EMAT/LVST. LV ejection fraction was >or=50% in 82 patients (S3 present in 9.8%) and <50% in 79 patients (S3 present in 30.4%; the <50% group also had a greater EMAT, EMAT/LVST, and lower mean LVST [p<0.05]). Patients with an S3 had a lower ejection fraction, larger mean left atrial and LV dimensions, and an increased proportion of diastolic dysfunction. Acoustic cardiography allows reliable detection of the S3, which correlates with echocardiographic evidence of impaired LV function, and the EMAT/LVST ratio reflects reduced ejection fraction, providing an affordable, accessible means to assess LV dysfunction in the outpatient setting.
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