Chapter 49 Flashcards
What is a Holter Monitor?
ECG device that has a small recorder and is worn by the pt over a small period of time to record the electrical activities of the heart
what is a lead?
view of the electrical activity of the heart
what is polarity?
condition of having 2 poles, 1 positive and one negative
what does a pulmonary function test do?
measures and evaluates lung capacity and volume
what is repolarization?
period of electrical recovery
what is spirometry?
test used to measure breathing capacity
what is a stylus?
penlike instrument on an ECG machine
what is the cardiac cycle?
sequence of contraction/relaxation of the heart
what is deflection?
peaks and valleys observed in an ECG tracing
what is an electrocardiograph?
instrument that measures and displays the electrical impulses of the heart
what is an electrode?
electrical pulse sensor
what is forced vital capacity?
greatest volume of air that can be expelled during rapid, forced expiration
which wave is a downward deflection that represents an impulse going through both ventricles?
the S wave
what are the most used electrodes?
disposable
which wave is a large upward spike that represents a pulse going through the LV?
the R wave
how many leads are there that directly monitor electrodes the arms and legs?
6
which wave is a downward deflection that represents an impulse traveling down the septum toward the purkinje fibers?
the Q wave
what control adjusts the height of the standardization mark and the tracing?
sensitivity control
what is premature ventricular contractions?
beat that occurs early in the cycle followed by a pause before the next cycle
what is ventricular fibrillation?
saw tooth image
what is atrial fibrillation?
small, irregular, uncoordinated complex that are difficult to interpret