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Fig. 3 | Trials

Fig. 3

From: Electrically guided versus imaging-guided implant of the left ventricular lead in cardiac resynchronization therapy: a study protocol for a double-blinded randomized controlled clinical trial (ElectroCRT)

Fig. 3

Intervention group: electrical mapping. The local electrical activation delay is measured as time in milliseconds (ms) from QRS onset in the surface 12-lead electrocardiogram (ECG) to the maximum voltage change over time recorded in the local LV electrogram (EGM), reflecting the near-field activation of the myocardium according to the LV lead (QLV interval). The figure shows three examples of QLV measurements with the LV lead in a basal, mid, and apical position, exhibiting the longest QLV interval in the apical position. For simplicity, only the surface leads V2 and V6 and the local LV EGM (Pace 1–2) are shown

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Trials

ISSN: 1745-6215