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| These are two EKGs from an elderly woman with palpitations. The first was taken at 14h55 on 11 Aug. 99. | Rate (/min) | 119 | QT (ms) | 326 |
| pr (ms) | QRS axis (degrees) | 35 | ||
| QRS (ms) | 101 |
| This is a recording was made at 14h59 (four minutes after the first) and after the patient was given intravenous diltiazem. | Rate (/min) | 218 | QT (ms) | 231 |
| pr (ms) | 106 | QRS axis (degrees) | 29 | |
| QRS (ms) | 80 |
