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Fig. 4 | Cardiovascular Ultrasound

Fig. 4

From: Speckle tracking echocardiography analyses of myocardial contraction efficiency predict response for cardiac resynchronization therapy

Fig. 4

Longitudinal strain curves of a CRT responder. a and b shows the longitudinal strain curves for a responder at baseline and 6-month follow up respectively. The patient’s LVEF improved from 25 to 47%. QRS was recognized by software as the beginning of systole. Since the negative peak before AVC was automatically recorded as the peak strain, the global strain (GS) by software was − 7.9% at baseline and − 5.3% at follow-up. These findings were contrary to the LVEF improvement. However, after studying the EC within LVEj and the MLS throughout the cardiac cycle, we found that MLS was slightly improved, while EC and ECR were significantly improved

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