Category: Hyperkinesis

Rapid Resolution of Hyperkinesis After Exercise: Conclusion

Quantitative Two-Dimensional Echocardiography While there are few data on intraobserver variability in wall thickness measurements, the 8 percent interobserver variability was similar to the 6 to 8 percent reported by others. These previous studies, however, used area-based methods for wall thickness measurements, tracing the endocardial and epicardial borders, and measuring myocardial area at end-dias-tole and…

Rapid Resolution of Hyperkinesis After Exercise: Discussion

The major finding of this study was that maximal systolic wall thickening occurred within 2 min after exercise, then returned to baseline, corresponding to changes in hemodynamics. Temporal Variability in Thickening Exercise two-dimensional echocardiography is used to identify wall motion abnormalities that develop during ischemia in patients with coronary artery disease. When myocardial perfusion is…

Rapid Resolution of Hyperkinesis After Exercise: Results

There were significant (p<0.0001) changes over the time course of the study for heart rate, systolic BP, and rate pressure product (Table 1). Each postexercise heart rate mean was significantly increased over baseline (p<0.01). There was a significant elevation (p<0.005) of systolic BP until 5 to 7 min postexercise when there was a return to…

Rapid Resolution of Hyperkinesis After Exercise: Image Processing and Measurements

Only the parasternal long- and short-axis views were used for wall thickening measurements; endocardial surfaces were not consistendy visualized from the apical views at peak exercise. End-diastolic and end-systolic frames were digitized from videotape using a frame grabber (Nova Microsonics Color-Vue II) (512 X 240 x 6 bit matrix). End-diastole was defined as the frame…

Rapid Resolution of Hyperkinesis After Exercise: Methods

Exercise-induced wall motion abnormalities, visualized by two-dimensional echocardiography, suggest the presence of coronary artery disease with a sensitivity of 70 to 94 percent, and a specificity of 67 to 92 percent. Hyperkinetic wall motion, on the other hand, is predictive of an excellent prognosis. The normal, hyperkinetic response to exercise is transient; and there are…