| A | B |
|---|
| 3 factors for excitatbility | resting membrane potential, action potentuial, depolarization/repolaruizaton |
| conduction SA goes to | ATria |
| conduction Atria goes to | AV node |
| conduction AV node goes to | bundle of HIS |
| conduction bundle of HIS goes to | bundle branches |
| docnducton bundle branches go to | Purkinje fibers |
| conduction Purkinje fibers go to | ventricular myocardium |
| SA node beats | 60-100 b |
| AV node goes | 40-60 |
| ventricles / Purkinje fibers | 15-40 |
| depolarization = contraction == | systole |
| repolarization = resting - | diastole |
| electrical activity precedes | mechanical activity |
| electrical activity & mechanical activity = | contraction |
| 5 big blocks = | 1 second |
| 1 big block = | 0.2 |
| PAC's associated with | valve disease, atrial enlargement , heart failure |
| re-entry of impulses | afib, aflutter, paroxysmal atrial tachycardia |
| Supraventricular tachcardia (SVT) example | paroxysmal atrial tachycardia (PAT) |
| rate of PAT | 15-200 |
| treatment for PAT | adenosine, vagal maneuvers, cardioversion, ablation |
| Aflutter: atrial rate | 200-300 |
| treatment for Aflutter | observe; give CCB drips to slow rate |
| Atrial fibrillation desired rate | 60-100 a |
| Afib slow rate with | ccb, dig, bblockers |
| Afib complicatons | blood clots, pe's etc. |
| Afib tx | anticoagulation x 4-6 weeks, slow heart rate or ablation |
| lose atrial kick | CO drops 30% |
| goal for warfarin therapy | INR 2-3 |
| how to check for atrial thrombi | TEE |
| care before cardioversion | don't eat, vs, drug levels, electoltes stable |
| care during cardiversion | physician, hands off patches, syncroniz, set joues , clear |
| care after cardioversion | vs, rhythm, recover |
