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- J P Singh, P Musialek, P Sleight, P Davey, M Marinho, and G Hart.
- Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, United Kingdom.
- Am. J. Cardiol. 1998 Apr 1; 81 (7): 924-6.
AbstractIn subjects with a recent acute myocardial infarction, the hour immediately following awakening is associated with an abrupt exaggeration of heart rate-dependent changes and variability of the QT interval. Beta blockers were observed to blunt these waking hour changes.
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