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| Question | Answer |
| Rhythms that arise from the ventricles have abnormalities in ______, that look _____,_____, and, ________. | QRS complex; big, wide, and ugly |
| multifocal | pvc's that look different coming from more than one site |
| unifocal | pvc's that look the same |
| PVC | early depolarization begins in the ventricle instead the sinus node |
| Causes of PVC | anxiety, caffeine, alcohol, tobacco, dig toxicity, antiarrhythmic meds, electrolyte imbalance |
| Significant PVC's | more than 6 PVC's multifocal paired "couplet" PVC's triple PVC's R on T PVCs |
| bigeminy | pvc's are occurring in every other beat |
| trigeminy | pvc's every 3 beats |
| couplet | pvc's that occur in pairs |
| triplet | 3 pvc's in a row |
| R on T | falls on the down slope of the preceding T wave |
| Why is R on T dangerous? | correlates with ventricular repolarization, myocardium vulnerable state, cause repetitive ventricular contraction resulting in vtach and vfib |
| vtach | 3 or more pvc's in a row at a rate greater than 100 bpm |
| idioventricular | the impulse of conduction starts in the ventricles. SA and AV nodes have failed |
| vfib | absence of an audible heartbeat, palpable pulse, and respiration |
| What rhythm gets defibrillation as a tx? | vfib and pulseless vtach |
| Which rhythm gets cardioversion as a tx? | vtach w/pulse |
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