ECG Directory

Welcome to this interactive ECG course.




The ECGs are available sorted by keywords and categories.

ECG 221

ECG 221


Baseline rhythm

Regualr at 280 bpm.P-waves: not visible.PR interval: unmeasurable.QRS: enlarged (160 ms).ST segment: unmeasurable.T-waves: unmeasurable.QT interval: normal.


Wide QRS complex tachycardia.
Right bundle branch block morphology.
R/S ratio <1.


Ventricular flutter.


In this enlarged QRS complex tachycardia, the QRS morphology is typical for a ventricular origin. The rate is compatible with a flutter. The only differential diagnosis is atrial flutter in a patient treated with flecainide.




Reading level

2 / 3