How is the amplitude of heart activity measured using electrocardiography (ECG) and what do changes in amplitude indicate?

In this article, FAWA is generalized to local wave activity (LWA) to diagnose eddy–mean flow interaction on the regional scale. Nonstationary waves of finite (but small) amplitude propagating in a cold plasma both at an angle with respect to the magnetic field and perpendicular to ... Local finite-amplitude wave activity (LWA) measures the waviness of the local flow. In this work we relate the anticyclonic part of LWA, AWA (anticyclonic ... Aug 24, 2023 ... Pressure amplitude is a measure of the size of the variation in air pressure caused by a sound wave. In pure silence there is a constant ... The wave drift depends on the phase velocity relative to the Eulerian mean flow and peaks at about 1/3 of the transient Eulerian speed at geophysically relevant ... Mar 10, 2025 ... Amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium ... The magnitude of the displacement of a wave from a mean value. An ocean wave has an amplitude equal to the vertical distance from still-water level to wave ... Usually in transverse waves, amplitude is the measurement of the distance between a peak (top of a wave) or trough (valley or bottom) of a wave and the position ... Nov 29, 2017 ... A traveling wave is given by y(x, t) (6 cm) sin(12x + 50t), where x is in m and t is in sa. What are the amplitude, wave number, and angular frequency? amplitude wave activity and noted that the meridional excursion exhibited during LC1 was partly nonlinear advection and not completely a wave propagation phe-.