There is a regular rhythm at a rate of 48 beats/min. The QRS complex duration is normal (0.08 sec), with a normal morphology and axis between 0° and 90° (positive QRS complex in leads I and aVF). The ...

The correct diagnosis is atrial tachycardia with variable block (Figure 2). Figure 2. Courtesy of Dr Podrid. The rhythm is basically regular at a rate of 50 beats/min, although the first and second ...