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. Author manuscript; available in PMC: 2019 Oct 4.
Published in final edited form as: J Electrocardiol. 2018 Jul 10;51(5):859–862. doi: 10.1016/j.jelectrocard.2018.07.004

Figure 3.

Figure 3.

Schematic diagram depicting changes in the timing of the cardiac cycle with baseline AAI pacing and with CRT pacing in Patient 1. CRT pacing decreased the isovolumetric contraction time by 51% allowing for a 15% increase in the diastolic filling time. Intervals were measured using tissue Doppler imaging with a frame rate of 125 frames per second. Findings were similar in Patient 2: isovolumetric contraction decreased from 99ms to 78ms, isovolumetric relaxation decreased from 142ms to 103ms, and overall diastolic filling increased from 434ms to 518ms.