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Quantitative analysis of t-wave amplitude during parabolic flight.
| Content Provider | CiteSeerX |
|---|---|
| Author | Caiani, Eg Vimercati, C. Tu, Td Capderou, A. Cerutti, S. Vaida, P. |
| Abstract | Our goal was to develop a method for the analysis of T-wave maximum amplitude (Tmax), to quantify its changes with gravity (G z) during parabolic flight, and test the hypothesis that microgravity (0G z) induces alteration in ventricular repolarization. ECG was obtained in 12 normal male subjects in upright position during consecutive parabolas with lower-body negative pressure (LBNP) randomly activated at 0G z. The X, Y and Z leads were used to compute vector V. Each QQ was classified according to G z (1G z, 1.8G z, 0G z, 1G z recovery) at its time occurrence and used to obtain a template, from which Tmax was computed. At 0G z, Tmax showed a significant increase (15%±4%), compared to 1G z. With LBNP, the Tmax increase at 0G z was only 8%±4%. At 1G z recovery, Tmax was increased by 5%±2%. Microgravity influences ventricular repolarization by increasing T wave amplitude. 1. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Parabolic Flight Quantitative Analysis T-wave Amplitude Ventricular Repolarization Wave Amplitude Upright Position T-wave Maximum Amplitude Tmax Increase Normal Male Subject Time Occurrence Significant Increase Consecutive Parabola Lower-body Negative Pressure |
| Content Type | Text |
