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What does the relative refractory period of the T wave represent?
The relative refractory period of the T wave represents a vulnerable period in the cardiac cycle during which a premature beat can trigger an arrhythmia, such as Torsades de Pointes. This period occurs during the repolarization phase, when the myocardium is in a state of partial recovery but not fully refractory.
What is a T-wave?
The T wave represents the repolarization (or recovery) of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period. The last half of the T wave is referred to as the relative refractory period (or vulnerable period). The T wave contains more information then the QT interval. The T wave can be described by its symmetry, skewness, slope of ascending and descending limbs, amplitude and subintervals like the TpeakTend interval. In most leads, the T wave is positive. However, a negative T wave is normal in lead aVR. Lead V1 may have a positive, negative, or biphasic T wave. In addition, it is not uncommon to have an isolated negative T wave in lead 3, aVL, or aVF.
Which wave properties are relative to time?
Frequency and period are wave properties that are relative to time. Frequency is the number of oscillations a wave completes in one second, while period is the time it takes for one complete oscillation. Both of these properties describe how the wave changes over time.
What happens immediately after the QRS wave of the cardiac cycle?
There are a number of things that may happen during the QRS wave. There will be ventricular depolarization and right after absolute refractory period for ventricles will occur.
WHAT wave can represent a radio wave?
A radio
The time it takes two successive crests of an ocean wave to pass a given point is called a?
A wave length.
What would happen if a nerve fiber was stimulated from both ends simultaneously?
The neural activity progresses as if it were a wave (the effect moves but the nerve, of course does not). As the wave progresses it depolarizes the nerve surface, opens Na+ channels and activates the nerve surface as it goes forward. One effect of the firing however is that the Na+ channels inactivate and enter a refractory period in which they will not reopen. This essential drives the propagation wave in one direction only. If the nerve were to be simultaneously stimulated at both ends the two waves would meet and then activity would cease. Neither wave would be able to overcome the refractory membrane that the other wave had passed over.
What is the reciprical of the period of a sound wave?
The reciprocal of the period of ANY wave is the wave's frequency.
How do you find wave period with wavelength and wave speed?
Wave period can be found by dividing the wavelength by the wave speed. The formula is: Period = Wavelength / Wave Speed. The period represents the time it takes for one wave cycle to pass a given point.
What is relative amplitude?
Relative amplitude is a measure of the size of a wave in comparison to a reference point or another wave. It is expressed as a ratio or percentage of the maximum amplitude of a wave. In essence, it describes how strong or weak a wave is compared to a baseline or another wave.
How does wave speed relate to wavelength and period?
Wave speed is dependent on both wavelength and period. The relationship is described by the formula: wave speed = wavelength / period. As wavelength increases, wave speed also increases. Conversely, as period increases, wave speed decreases.
Which direction is the particle motion in shear waves relative to the energy of the wave?
The particle motion in shear waves relative to the energy of the wave is downward.
