Flutter waves may be occasionally seen in patients with atrial flutter. In this rhythm, the atria contract generally 300 times per min with a varying ventricular rate, which in most untreated patients is usually about 150. Flutter waves are more likely to be seen only when the ventricular rate has been slowed spontaneously or secondary to therapy. In contrast to atrial fibrillation, the atrial contraction in patients with atrial flutter is often better organized and may generate pressure, and the atrial relaxation that follows may cause visible descents.
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