Diminished Left Ventricular Dyssynchrony and Impact of Resynchronization in Failing Hearts With Right Versus Left Bundle Branch Block
Melissa J. Byrne, PhD*,
Robert H. Helm, MD*,
Samantapudi Daya, MD*,
Nael F. Osman, PhD ,||,
Henry R. Halperin, MD, MA, FAHA*, ,,
Ronald D. Berger, MD, PhD*,
David A. Kass, MD, FAHA*, and
Albert C. Lardo, PhD, FACC, FAHA*,, ,,*
* Department of Medicine, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
|| Department of Electrical and Computer Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Figure 1 Strain Plots Comparing Mechanical Dyssynchrony in Failing Hearts With RBBB and LBBB
Temporal strain maps for (A) left bundle branch block (LBBB) + heart failure; (B) right bundle branch block (RBBB) + heart failure during right atrial pacing; (C) corresponding LBBB + heart failure strain plot; and (D) corresponding RBBB + heart failure strain plot during early and late systole.
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