Which of the following ECG findings is present in a client who has both a first-degree heart block and a bundle branch block?
1. A PR interval of 0.24 second and a QRS complex width of 0.16 second
2. An ST segment elevation and an inverted T wave
3. A QT interval of > 0.44 second and a PR interval of 0.16 second
4. An ST segment elevation and a QT interval of < 0.44 second
A PR interval of 0.24 second and a QRS complex width of 0.16 second.
Rationale: A PR interval of > 0.20 second indicates first-degree block, and a QRS complex with of > 0.12 seconds is bundle branch block. ST segment elevation and inverted T waves are both indicative of myocardial ischemia/injury. A QT interval of > 0.44 is abnormal but is not related to first-degree block or bundle branch block.
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