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Molecular and cellular mechanisms of myocardial stunning.
The past two decades have witnessed an explosive growth of knowledge regarding postischemic myocardial dysfunction or myocardial "stunning." The purpose of this review is to summarize currentExpand
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Regenerative Potential of Cardiosphere-Derived Cells Expanded From Percutaneous Endomyocardial Biopsy Specimens
Background— Ex vivo expansion of resident cardiac stem cells, followed by delivery to the heart, may favor regeneration and functional improvement. Methods and Results— Percutaneous endomyocardialExpand
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Beat-to-beat QT interval variability: novel evidence for repolarization lability in ischemic and nonischemic dilated cardiomyopathy.
BACKGROUND Dilated cardiomyopathy (DCM) is associated with a high incidence of malignant ventricular arrhythmias and sudden death. Abnormalities in repolarization of ventricular myocardium have beenExpand
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Electrophysiological remodeling in hypertrophy and heart failure.
Time for primary review 28 days. Over 2 million Americans suffer from heart failure and more than 200 000 die annually. The incidence is estimated to be 400 000 per year with a prevalence of overExpand
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Synchronized Whole Cell Oscillations in Mitochondrial Metabolism Triggered by a Local Release of Reactive Oxygen Species in Cardiac Myocytes*
Reactive oxygen species (ROS) and/or Ca2+ overload can trigger depolarization of mitochondrial inner membrane potential (ΔΨm) and cell injury. Little is known about how loss of ΔΨm in a small numberExpand
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Mechanisms of altered excitation-contraction coupling in canine tachycardia-induced heart failure, I: experimental studies.
Pacing-induced heart failure in the dog recapitulates many of the electrophysiological and hemodynamic abnormalities of the human disease; however, the mechanisms underlying altered Ca2+ handlingExpand
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Mechanisms of altered excitation-contraction coupling in canine tachycardia-induced heart failure, II: model studies.
Ca2+ transients measured in failing human ventricular myocytes exhibit reduced amplitude, slowed relaxation, and blunted frequency dependence. In the companion article (O'Rourke B, Kass DA, TomaselliExpand
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Infarct Tissue Heterogeneity by Magnetic Resonance Imaging Identifies Enhanced Cardiac Arrhythmia Susceptibility in Patients With Left Ventricular Dysfunction
Background— The extent of the peri-infarct zone by magnetic resonance imaging (MRI) has been related to all-cause mortality in patients with coronary artery disease. This relationship may result fromExpand
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Endogenous nitric oxide mechanisms mediate the stretch dependence of Ca2+ release in cardiomyocytes
Stretching of cardiac muscle modulates contraction through the enhancement of the Ca2+ transient, but how this occurs is still not known. We found that stretching of myocytes modulates the elementaryExpand
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c-kit+ Cells Minimally Contribute Cardiomyocytes to the Heart
If and how the heart regenerates after an injury event is highly debated. c-kit-expressing cardiac progenitor cells have been reported as the primary source for generation of new myocardium afterExpand
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