The importance of P wave morphology on the ECG
- Correspondence to Dr Khang Li Looi; khangli{at}hotmail.com
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Contributors A-KR: wrote the paper, reviewed the literature and elaborated the images. KLL and SF performed the ablation procedure and reviewed the paper.
- Focal atrial tachycardia
- electrocardiogram
- intracardiac electrogram
- cardiac electrophysiological study
- computer-assisted three-dimensional imaging
- arrhythmias
- endocardial map
- radiofrequency ablation (RFA)
- 12 lead ECG
- atrial fibrillation
- channelopathy
Introduction
Focal atrial tachycardia (AT) is the least common form of supraventricular tachycardia. However, the surface 12-lead ECG is a very helpful tool and the use of P-wave morphology (PWM) on surface ECG to localise the site of focal AT is of paramount importance. Subtle ECG changes with respect to PWM in AT could be mistaken as sinus rhythm (SR). We report a case of a young woman with focal AT located at the tricuspid annulus in which the heart rate in both …
