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Heart. 2000 December; 84(6): 579–581.
PMCID: PMC1729514

Multisite stimulation for correction of cardiac asynchrony

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Figure 1
Simultaneous representation of ECG and Doppler left ventricular diastolic filling flows. The first two complexes show spontaneous rhythm. The left ventricular contraction delay caused by a prolonged PR interval and, perhaps, prolonged QRS duration, is ...
Figure 2
Left: the atrioventricular delay (AVD) is too short. The E wave is early, which tends to lengthen the ventricular filling duration; however, the A wave is prematurely interrupted by mitral valve closure caused by ventricular systole. Centre: the atrioventricular ...
Figure 3
The first cycle illustrates the measurement between QRS onset (at the pacing spike) and onset of aortic ejection. With left bundle branch block (second spontaneous QRS), the pre-ejection interval is prolonged. Initiation of dual chamber pacing, which ...
Figure 4
The mechanical interventricular delay (IVD) = LPEI − RPEI. It can routinely be measured, regardless of the ambient spontaneous or paced rhythm. LPEI, left pre-ejection interval; RPEI, right pre-ejection interval. ...
Figure 5
With biventricular stimulation, the left ventricle is activated earlier and, if the implant was "successful", the left pre-ejection interval is shorter compared to the interval measured during conventional right ventricular pacing. The atrioventricular ...
Figure 6
Four chamber apical view of the long axis shortening of the left ventricle. Time-movement evaluation of the contraction of the left lateral wall close to the mitral valve annulus is performed. The longest delay reflecting to the end of lateral wall systolic ...

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