hoạt động tâm nhĩ thường xuyên xuất hiện "sạch" răng cưa dẫn II, III, aVF, và thường rời rạc 'P' sóng trong V1 dẫn. Tỷ lệ tâm nhĩ thường về 300/min, nhưng có thể được làm chậm như 150-200/min hoặc nhanh như 400-450/min | Atrial Flutter Regular atrial activity with a clean saw-tooth appearance in leads II III aVF and usually discrete P waves in lead V1. The atrial rate is usually about 300 min but may be as slow as 150-200 min or as fast as 400-450 min. Untreated A-flutter often presents with a 2 1 A-V conduction ratio. This is the most commonly missed supraventricular tachycardia because the flutter waves are often difficult to find when there is 2 1 ratio. The ventricular response may be 2 1 3 1 4 1 or irregular depending upon the AV conduction properties and AV node slowing drugs on board Atrial Rutter Heart Rate Rhythm PWave PR interval Or seconds . QRS lin second ỉ A 220-430 bpm V 300 bpm Regular or variable Sawtoothed appearance N A 12 1ÍH37 Ffahk G. YatiCrWiU .
