Journal of the American College of Cardiology
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J. Am. Coll. Cardiol. · Feb 2008
Regional variation in cardiac catheterization appropriateness and baseline risk after acute myocardial infarction.
We evaluated whether appropriateness and baseline risk of cardiac catheterization varied according to regional intensity of invasive therapy after acute myocardial infarction (AMI), and whether AMI mortality varied according to invasive intensity regions. ⋯ Although higher-risk patients and those with more appropriate indications may have the most to benefit from an invasive strategy after AMI, we found that higher-invasive regions do not differentiate procedure selection based on the patients' appropriateness or their baseline risks.
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J. Am. Coll. Cardiol. · Feb 2008
Interventricular mechanical asynchrony in pulmonary arterial hypertension: left-to-right delay in peak shortening is related to right ventricular overload and left ventricular underfilling.
The purpose of this study was to explore in pulmonary arterial hypertension (PAH) whether the cause of interventricular asynchrony lies in onset of shortening or duration of shortening. ⋯ In PAH, the L-R delay in myocardial peak shortening is caused by lengthening of the duration of RV shortening. This L-R delay is related to LVSB, decreased LV filling, and decreased stroke volume.
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J. Am. Coll. Cardiol. · Feb 2008
Randomized Controlled Trial Multicenter StudyAssociation of impaired thrombolysis in myocardial infarction myocardial perfusion grade with ventricular tachycardia and ventricular fibrillation following fibrinolytic therapy for ST-segment elevation myocardial infarction.
The goal of this analysis was to evaluate the association of impaired Thrombolysis In Myocardial Infarction myocardial perfusion grade (TMPG) with sustained ventricular tachycardia (VT) or ventricular fibrillation (VF). ⋯ Despite restoration of normal epicardial flow or a left ventricular ejection fraction >or=30%, impaired myocardial perfusion on angiography 3.5 days after fibrinolytic administration for STEMI is associated with an increased incidence of VT/VF.