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Figure 4 Tracings of LV volume segments of Patients 2 and 3 before and after PLV and at re-cath five days after PLV. Vlv = total LV volume in time during four consecutive heart beats. Dotted lines = start of the ejection phase. The pre-PLV segmental synchrony values of Patient 2 were 64%, 62%, 63% and 80% for, respectively, segments 1 through 4 yielding a synchrony index (Sync) of 68%, whereas at re-cath the segmental values were 75%, 77%, 71% and 80% yielding a Sync of 76%.