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Conventional BiVP-CRT using a quadripolar CS lead in a patient with ischemic cardiomyopathy. Panel (A) shows the baseline QRS with LBBB; panel (B) shows the final paced QRS obtained with BiVP; panels (C,D) show the final lead position in the 30° LAO and RAO views, respectively. CS: Coronary sinus; DF: Defibrillation; LAO: Left anterior oblique view; RAO: Right anterior oblique view. ECG sweep speed 25 mm/s.
