Right Ventricular Pacing Can Induce Ventricular Dyssynchrony in Patients With Atrial Fibrillation After Atrioventricular Node Ablation
Laurens F. Tops, MD,
Martin J. Schalij, MD, PhD,
Eduard R. Holman, MD, PhD,
Lieselot van Erven, MD, PhD,
Ernst E. van der Wall, MD, PhD and
Jeroen J. Bax, MD, PhD*
Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands

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Figure 1 A linear relation was found between septal-to-posterior wall motion delay (SPWMD) and septal-to-lateral delay after long-term right ventricular pacing.
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Figure 3 Effects of long-term right ventricular (RV) pacing on clinical status and left ventricular ejection fraction (LVEF). (A) In patients with LV dyssynchrony, New York Heart Association (NYHA) functional class deteriorated significantly, whereas NYHA functional class improved significantly in patients without LV dyssynchrony. (B) LV ejection fraction decreased significantly in patients with LV dyssynchrony after long-term RV pacing. *p < 0.05 baseline versus follow-up; p < 0.05 with dyssynchrony versus without dyssynchrony. White columns = baseline; black columns = follow-up.
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