Journal of the American College of Cardiology
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J. Am. Coll. Cardiol. · Aug 2013
Paradoxical response to exercise in asymptomatic hypertrophic cardiomyopathy: a new description of outflow tract obstruction dynamics.
The purpose of this study was to analyze left ventricular obstruction in patients with hypertrophic cardiomyopathy (HCM) during exercise echocardiography. ⋯ Our study reports a subgroup of HCM patients, designated PRE based on a decreased intraventricular gradient during exercise. The reduced exertional obstruction may account for the better functional class and trend toward fewer clinical events in PRE patients.
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J. Am. Coll. Cardiol. · Aug 2013
Multicenter StudyImpact of low flow on the outcome of high-risk patients undergoing transcatheter aortic valve replacement.
This study sought to assess the impact of baseline left ventricular (LV) outflow, LV ejection fraction (LVEF), and transvalvular gradient on outcomes following transcatheter aortic valve replacement (TAVR) in patients with severe aortic stenosis (AS). ⋯ Low flow but not low LVEF or low gradient is an independent predictor of early and late mortality following TAVR in high-risk patients with severe AS. SVi should be integrated in the risk stratification process of these patients.
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J. Am. Coll. Cardiol. · Aug 2013
Modeling serum level of s100β and bispectral index to predict outcome after cardiac arrest.
This study was designed to evaluate multimodal prognostication in patients after cardiac arrest (CA). ⋯ Combined determination of serum level of S100β and BIS monitoring accurately predicts outcome after CA.
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J. Am. Coll. Cardiol. · Aug 2013
Multicenter StudyCandidate gene association study of coronary artery calcification in chronic kidney disease: findings from the CRIC study (Chronic Renal Insufficiency Cohort).
This study sought to identify loci for coronary artery calcification (CAC) in patients with chronic kidney disease (CKD). ⋯ We identified several loci associated with CAC in CKD that also relate to MI in a general population sample. CKD imparts a high risk of CHD and may provide a useful setting for discovery of novel CHD genes and pathways.
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J. Am. Coll. Cardiol. · Aug 2013
Inverse relationship between fractionated electrograms and atrial fibrosis in persistent atrial fibrillation: combined magnetic resonance imaging and high-density mapping.
This study sought to evaluate the relationship between fibrosis imaged by delayed-enhancement (DE) magnetic resonance imaging (MRI) and atrial electrograms (Egms) in persistent atrial fibrillation (AF). ⋯ Atrial fibrosis as defined by DE MRI is associated with slower and more organized electrical activity but with lower voltage than healthy atrial areas. Ninety percent of continuous CFAE sites occur at non-DE and patchy DE LA sites. These findings are important when choosing the ablation strategy in persistent AF.