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What does abnormal t-wave mean?
Abnormality can be due to abnormal heart rhythms or cardiac muscle defects.
Why does the AED fail at times?
AEDs, or automatic external defibrillators, are designed to pick up certain life-threatening rhythms such as VF (ventricular fibrillation) and once detected to shock (by direct current) the rhythm back into a more stable rhythm, ideally sinus rhythm. In hospitals the defibrillators they use can shock people, but they can also perform cardioversion. This is where they use synchronised direct current (synchronised with particular parts of the rhythm; R wave, T wave etc) to convert rapid paced rhythms back to normal rhythms.
What does abnormal t wave mean?
what causes abnormal t waves
The peaks and valleys of the electrical activity of the heart are?
The first little bump is the P wave it is followed by the QRS Complex that's the big spike and that is followed by the T wave which is a bigger bump than the P wave... normally that's only in a normal Sinus Rhythm
What is r t segment?
The R-T segment is the portion of the EKG tracing from the R wave to the T wave.
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.
What are the characteristic of a wave?
in general, a harmonically oscillating, one dimensional wave is described by the following function: f(x,t)=Acos(2phi*t/T -2phi*x/ג) where A is the amplitudes (or wave height), T is the wave's period time and ג is the wave length. these are the three basic characteristics of a wave. other characteristics can be calculated from these: the frequency f=1/T , and the speed of the wave v=גf.
The period during which the ventricles are repolarizing?
the asnwer is t wave
Give an example of the other type of wave.?
The PR wave,QRS wave, and T wave.
What is the portion of the ECG that indicates ventricular repolarization?
The wave indicating atrial repolarization wave is hidden by the QRS complex. Ventricular repolarization is indicated by the T wave.
How do wave frequency and period of a wave relate?
Wave frequency f, and period of wave T are inverses, related by fT=1.
What does the t wave represent on an ecg?
It represents the repolorization of the ventricles. The ventricles must reset electrically after contracting. In a normal Sinus Rhythm the p wave comes first. Then the QRS complex which is the largest part of the heartbeat will come less than .2 seconds later. The QRS complex usually lasts less than .12 seconds. The final bump is (usually) the T wave.
