Biphasic P Wave and Prolonged Pq Interval
Biphasic P wave and prolonged PQ interval.ECG from the limb leads during sinus rhythm in a 64-year-old patient who has come for catheter ablation treatment of atrial fibrillation. P wave is biphasic (marked with an oval) and prolonged to 170 ms (normal upper threshold 120 ms). This is a sign of prolonged conduction time within the atrial tissue and between the atria. This is considered to predispose to atrial fibrillation. The PQ interval is also prolonged to 270 ms.
Picture: Duodecim Medical Publications Ltd; Text: Hannu Parikka and Pekka Raatikainen
Primary/Secondary Keywords
- P wave
- Biphasic P wave
- Bifid P wave
- PQ
- PQ interval
- Prolonged PQ interval
- ECG