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20 Cards in this Set
- Front
- Back
sustained Ventricular rhythm
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sustained greater than 30 seconds
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causes of premature Ventricular beats
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Digitalis intoxication, CHF, MI, Hypoxia, low potassium, low magnesium, cardiomyopathy (drugs, nicotine, caffeine)
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pause following PVC that allows recovery is called
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full compensatory pause
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bigemmy, trigemmy, quad
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bigemmy=every other beat is premature, tri=every 3rd beat quad=every 4th beat
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unifocal vs multifocal
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arising from the same focus or from different foci
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retrograde p wave
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sometimes the ectopic impulse from the ventricle may spread backwards into the atria
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left ventricular ectopics
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left rabbit ear is taller than right rabbit ear. peak early, upstroke is steep, downstroke is slurred
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salvo of ventricular ectopy
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3 in a row
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2 PVCs grouped together
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coupling
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interpolated ventricular premature beats
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sandwiched between 2 normal beats without a full compensatory pause
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fusion beats
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summation beats of impulses that come together and activating the same territory.
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R on T phenomenon
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puts pt at high risk of going into Ventricular rhythm. Get a fusion beat-->V tach/V fib
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ventricular escape beat
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when there is such a long puase in sinus beats, the ventricle will pick up and you will see a loooong pause, then a venticular beat
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features favoring ventricular ectopy
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fusion beats, R on T, deepest QS in V4-5, L rabbit ear taller in V1
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V tach defined
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at least 3 consecutive bizarre QRS complexes. Rate 120-200/min. Usually regular rhythmn
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V fib
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no regular pattern or rate to the rhythm. Coarse, irregular pattern. Ventricles ineffective in pumping blood. Terminal unless, CPR and SHOCK
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Torsades the pointes treatment
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Magnesium sulfate
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Accelearated idioventricular thythm
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ventricular rhythm that is between 60-100/min. It is a normal rate, but ventricular rhythm
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torsades de pointes
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twising of the QRS complexes. associated with prolonged QT interval.
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torsades can be caused by
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drugs, phenothizines, electrolyte disturbances, subarachnoid hemorrhage
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