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Complete left bundle branch block (CLBBB)-like QRS morphology of right ventricular pacing at pacemaker implantation satisfying the American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society criteria of CLBBB was associated with development of pacing induced cardiomyopathy.
A rapid echocardiogram was performed, revealing an ejection fraction of 20% with thinning of the anterior-apical walls. Again, see Ken's discussion below) Discussion continued The absence of pace spikes suggests this is not a pacemaker/ICD-related rhythm in this patient with an ICD. Where does the QRS begin? Thus VT is very probable.
Negative predictors of adverse outcome: Pacemaker Pre-syncope or "near-syncope," but there is still some small risk (5, 18) These last two are identified in studies, but I consider them dangerous signs and symptoms in their own right, as above: 10. QRS Arch Intern Med 2009 Jul 27; 169:1262. Arch Intern Med 2009 Jul 27; 169:1305.
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