This patient had classic atrial flutter with a cycle length of 240 msec prior to ablation. The P waves were deeply negative in ECG leads II, III, and aVF, and were initially upright in V1. Note that ...

The rhythm in Figure 1 has a subtle pattern—a narrow QRS complex with alternating short and long R-R intervals, resulting in paired QRS complexes. Careful observation of V1 in Figure 2 reveals tiny ...

When atrial flutter is seen with such a slow ventricular response (in this case, 9:1 conduction), there is concern for underlying complete heart block should the patient be restored to normal sinus ...

Atrial flutter is a type of irregular heartbeat, or an arrhythmia. It causes your heart to beat too fast. Atrial flutter doesn't always have symptoms, but it can sometimes have serious consequences if ...