Dr. Hugh Calkins answers the question: 'What Is Atrial Fibrillation?' — -- Question: What is atrial fibrillation, how is this different from normal rhythm, and how dangerous is it? Answer :Atrial ...

The diagnosis is atrial tachycardia with 3:2 Wenckebach and nonspecific ST-T-wave abnormalities (Figure 2). The rhythm is irregular but there is a repeating pattern of group beating: two QRS complexes ...

The correct diagnosis is atrial flutter with 2:1 atrioventricular (AV) block (Figure 2). Figure 2. Courtesy of Philip J. Podrid, MD. The rhythm is regular at a rate of 150 beats/min. The QRS complex ...