Nancy C. Flowers

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Sufficient data are available to recommend the use of the high-resolution or signal-averaged electrocardiogram in patients recovering from myocardial infarction without bundle branch block to help determine their risk for developing sustained ventricular tachyarrhythmias. However, no data are available about the extent to which pharmacological or(More)
I mproved methods for detecting individual patients recovering from myocardial infarction who are at high risk for sudden cardiac death are essential for reducing mortality from ventricular arrhythmias. During the past decade, many investigators have recorded low-amplitude, high-frequency waveforms and altered frequency components in the terminal QRS(More)
OBJECTIVE To improve the radiographic assessment of cartilage loss, as measured by joint space width (JSW) in patients with osteoarthritis (OA) of the knees required to detect the effect of structure modifying drugs in OA trials. This was achieved by determining which of 3 nonfluoroscopic radiographic views--standing extended, semiflexed, and(More)
Ventricular depolarization was analyzed in intact dogs by simultaneously recording body surface potential maps, McFee axial vectorcardiograms, and a 5 X 4 lead precordial grid of QRS complexes. The purpose of this study was to compare the effectiveness of subtraction approaches, using the simultaneously acquired data. The totally closed chest approach(More)
Sufficient data are available to recommend that the high-resolution or signal-averaged electrocardiogram can be used in patients recovering from myocardial infarction without bundle branch block to help to determine their risk for developing sustained ventricular tachyarrhythmias. However, no data are available regarding the extent to which pharmacologic or(More)
Signal averaging principles have been utilized since around 1875. Their application in medicine to enhance biologic signals was first made in 1947 for improved detection of electroencephalographic signals. The year 1963 marked the first application of this technique to cardiac signals. The more prevalent use in adult cardiology is in the detection of(More)
The electrocardiographic abnormalities found in localized cerebrovascular hemorrhage which have been documented by computerized tomography (CT) scans are described. Frontal lobe hemorrhages are associated especially with the electrocardiographic abnormalities of QT prolongation and neurogenic T waves. Brain stem hemorrhage seems to be associated with(More)