EKG Interpretation Final Exam Prediction Questions.

EKG Interpretation Final Exam Prediction Questions. Accelerated Idioventricular Rhythm - CORRECT ANSWER Rhythm: Regular Rate: 50-120 bpm P Wave: Absent PR Interval: Not measurable QRS: Wide (>0.10 sec), bizarre looking Accelerated Junctional Rhythm - CORRECT ANSWER Atrial Fibrilation - CORRECT ANSWER Irregularly irregular with no discernible p wave Rhythm: Irregular Rate: Very fast (> 350 bpm) for Atrial, but ventricular rate may be slow, normal or fast P Wave: Absent - erratic waves are present PR Interval: Absent QRS: Normal but may be widened if there are conduction delays Cause: continuous rapid-firing of multiple atrial automaticity foci. No complete depolarization of atria. Atrial Flutter - CORRECT ANSWER Rhythm: Regular or irregular Rate: Fast (250-350 bpm) for Atrial, but ventricular rate is often slower P Wave: Not observable, but saw-toothed flutter waves are present PR Interval: Not measureable QRS: Normal (0.06-0.10 sec) Ventricular Flutter - CORRECT ANSWER Rate: 250-350bpm Smooth sine waves of similar amplitude. So rapid that ventricles hardly have time to fill. Bundle Branch Block - CORRECT ANSWER Rhythm: Regular Rate: The underlying rate P Wave: Normal PR Interval: Normal (0.12-0.20 sec) QRS: Wide (>0.12 sec) First Degree Heart Block - CORRECT ANSWER Rhythm: Regular Rate: The underlying rate P Wave: Normal PR Interval: Prolonged (>0.20 sec) QRS: Normal (0.06-0.10 sec) Notes A first degree AV block occurs when electrical impulses moving through the Atrioventricular (AV) node are delayed (but not blocked). First degree indicates slowed conduction without missed beats.