This ECG shows ventricular pacing ... with the QRS complexes indicating 3rd degree heart block (complete heart block). Note that when a pacemaker lead is inserted into the right ventricle ...

This is absolutely important when dealing with athletes showing ventricular arrhythmias with left bundle branch block morphology or 12 ... our data suggest that the athlete’s heart can be ...

Take the Learn the Heart ECG Quizzes and Cases, then review once again, or as many times as you’d like, when you identify a gap in your knowledge. You can never look at too many 12-lead ECG ...