1 A Cardiac Rhythym Strip Analysis
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| EKG paper each small block =____ | 0.04 seconds (1 small block) |
| EKG paper 5 small blocks =____ | 0.20 seconds (1 large block) |
| P wave represents | atrial depolarization or atrial contraction |
| Abnormal P waves would be seen with which dysrhythmias? | PAC’s, sinus block/arrest, Aflutter, AFib |
| Causes of Abnormal P waves? | Atrial hypertrophy, hyperkalemia, PAC’s |
| PR interval represents? | conduction through the AV node, slowed conduction allowing time for the ventricles to fill |
| Length of normal PR interval? | 0.12-0.20secs (3-5 small boxes) |
| PR interval is Measured from | beginning of P wave to beginning of QRS complex |
| Abnormally long PRI >0.20 would be seen with which dysrhythmia? | First degree heart block |
| QRS represents | ventricular depolarization or ventricular contraction |
| Length of normal QRS? | 0.06-0.10seconds or <0.12secs (< 3 small boxes) |
| Abnormally long QRS >0.12secs would be seen with? | Interventricular conduction delays, Left Bundle Branch Block(LBBB) |
| T wave represents? | ventricular repolarization |
| Cause of Abnormal Tall Peaked T waves is? | Hyperkalemia |
| Tall peaked T waves would be seen with? | MI, BBB |
| ST elevation or depression is this normal or abnormal? | abnormal |
| ST elevation or depression is seen with? | Ischemia or Injury (MI) |
| QT interval represents? | total depolarization and repolarization of the ventricles |
| Length of normal QT interval? | <0.40secs |
| Abnormally long QT interval >0.40 is caused by? | Hypocalcemia, hypothyroid, Amiodorone(Meds), MI |
| Abnormally long QT interval would be seen with? | Life threatening dysrhythmias, MI |
| What is the Easy method for determining the heart rate from the EKG strip? | number of R waves in 6sec strip X 10 |
| What is the most accurate method for determining the heart rate from the EKG strip? | 1500 divided by number of small blocks between R waves |
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