Atrial flutter occurs when a “reentrant” circuit is present, causing a repeated loop of electrical activity to depolarize the atrium at a rate of about 250 to 350 beats per minute; the atrial ...

The three irregularly irregular rhythms are atrial fibrillation, atrial flutter with ... in these leads, but negative QRS in lead I). Hypokalemia causes U waves in the ECG seen as a positive ...

CV evaluation included history, PE, 12-lead and exercise ECG, echocardiography ... or supraventricular tachyarrhythmias (atrial flutter, paroxysmal atrial fibrillation or SVT) were identified in 9 ...