Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing
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J Interv Card Electrophysiol · Nov 2011
Review Meta Analysis Comparative StudyCardiac resynchronization therapy in patients with mild heart failure: a systematic review and meta-analysis.
Cardiac resynchronization therapy (CRT) reduces symptoms and improves survival in patients with advanced heart failure (New York Heart Association (NYHA) functional class III-IV), reduced ejection fraction, and wide QRS complex. Whether CRT has the same benefit also in asymptomatic or mildly symptomatic heart failure patients is controversial. Our objective is to summarize the available evidence on the effects of CRT in asymptomatic or mildly symptomatic (NYHA I-II) heart failure patients. ⋯ Among patients with mild (NYHA II) heart failure, CRT reduces mortality and the risk of heart failure events, induces a favorable LV reverse remodeling and slows the progression of heart failure symptoms.
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J Interv Card Electrophysiol · Nov 2011
Feasibility of multiple short, 40-s, intra-procedural ECG recordings to detect immediate changes in heart rate variability during catheter ablation for arrhythmias.
This study aims to evaluate a method to detect heart rate variability (HRV) changes using short ECG segments during ablation for arrhythmias. ⋯ Averaging multiple 40-s windows give valid HF and LF HRV measurements that enable detection of intra-procedural changes. Left atrial ablation around the right-sided pulmonary veins is unique in producing reductions in HRV. This method has the potential for use as an endpoint marker for adjunctive autonomic ablation procedures.