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Resp 16
electrocardiograms study guide
| Question | Answer |
|---|---|
| What does the ECG measure/record | Cardiac electrical activity Repolarization (relaxing) and depolarization (contracting) |
| When will ECG be indicated | Pt complains of chest pain, SOB, dyspnea with palpations, weakness, lathargy, and dizziness |
| How many seconds does the small squares represent | .04 seconds |
| How many seconds does the large squares represent | .2 seconds (5 smaller boxes) |
| What is the speed | 25 mm/sec |
| What is cardiac electrophysiology | basic arrythymia interpretations (why the impulses are doing what they are doing) |
| Trace the normal cardiac stimulus as it spreads through the atria and ventricles | SA nodes, AV nodes, Bundle of HIS, R/L bundle branch, Purkinje fibers |
| Depolarization | contracting When it goes up |
| Repolarization | relexing when it goes down |
| Normal width of duration for QRS interval | .05-.1 seconds |
| Normal width of duration for PR interval | .12-.2 seconds |
| What is the noraml pace maker of the heart | SA node |
| The rate of the SA node | 60-100 |
| Rate of AV node | 40-60 |
| rate of Bundle of branches | 30-40 |
| rate of Purkinje | 30-40 |
| 2 nerve fibers within the right atrium that alter the HR when stimulated | Parasympathetic and sympathetic |
| What does the Sympathetic do if stimulated | speeds HR |
| What does the parasympathetic do if stimulated | slows HR |
| Holter monitoring | Monitor patient wears and takes home and tape records everything, patient tapes when symptom occurs |
| echocardiography | ultrasound used to see heart and it's structure in motion (including valves) |
| Lubb heart sound | heard when AV (mytral and tricuspid valves) close (LOUDER because pressure is higher in the left side of the heart) |
| Dubb heart sound | heard when semilunar (pulmonatic and aortic valves) close |
| Murmur | sound heard inbetween lubb and dubb When it's incompetent AV produces high pitched swooshing..... It is the backflow of blood through the AV into the atrium |
| Defibrillation setting for ventricular fibrillation | energy level of 120-200 J for adults and 2-4 J for children |
| 3 lead system for lead placement | White on upper right Smoke over fire(gray over red) clouds over grass (white over green) Brown on ground |
Created by:
TnJFarrington12
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