Interventricular electromechanical delay (IMD)
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Interventricular electromechanical delay between pulmonary and aortic outflow. Measured as the time between the onset of the QRS to onset of aortic flow vs. QRS to onset of pulmonary flow
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≥ 40 ms
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6
|
1
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Septal-to-posterior wall motion delay (SPWMD)
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M-mode: the interval between the maximum contraction of the septum and the maximum contraction of the left ventricular posterior wall
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≥ 130 ms
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14, 15
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2
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Ts-12
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Maximum difference in Ts between any 2 of 12 LV segments
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≥ 104 ms
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16
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3
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Ts-12-SD
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Standard deviation of the time to peak myocardial velocity (Ts) of the 12 LV segments
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≥ 34.4 ms
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16
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4
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Septal-to-lateral delay in peak systolic velocity (TDId)
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Delay between the basal septal and basal lateral Ts, assessed with color-coded TDI
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≥ 60 ms
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17
|
5
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LVEMD
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aortic pre-ejection delay measured as the time between the onset of the QRS to beginning aortic flow
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> 140 ms
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6
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6
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Delayed longitudinal contraction (DLC)
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Number of LV segments with DLC assessed by tissue tracking in the apical 4-chamber, 2-chamber and long-axis view
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≥ 2
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18
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7
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