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. 2023 Oct 31;25(11):euad326. doi: 10.1093/europace/euad326

Figure 4.

Figure 4

Example of ECG and CMR of LBBAP-CRT responder in patients with or without Strauss LBBB. (A–C) are from an LBBAP-CRT responder with baseline ECG that shows wide QRS complex (162 ms) and meets the Strauss LBBB criteria (A). After LBBAP, optimized paced QRSd was reduced to 128 ms. (B) The LVEF recovered from 29% at baseline to 66% and LVESV reduced from 193 to 47 mL after 6 months follow-up. The CMR imaging showed no presence of LGE in the left ventricle (C). (D–F) are from an LBBAP-CRT responder with wide QRS complex (184 ms) but did not meet the Strauss LBBB criteria (D). After LBBAP-CRT, QRS complex narrowed to 126 ms (E). The LVEF improved from 26% at baseline to 48% and LVESV reduced from 112 to 48 mL after 6 months follow-up. The CMR imaging showed no presence of LGE in the left ventricle (F). CRT, cardiac resynchronization therapy; LBBB, left bundle branch abnormality; LVEDD, left ventricular end-diastolic diameter; LVEF, left ventricular ejection fraction; LVESV, left ventricular end-systolic volume; LGE, late gadolinium enhancement; opti-paced QRSd, optimized paced QRS duration.