A 12 lead ECG showing<unk> <unk>  is usually apparent on an ECG, but if the heart rate is above 140 bpm the P wave may be difficult to distinguish from the previous T wave and one may confuse it with a paroxysmal supraventricular tachycardia or atrial flutter with a 2:1 block. Ways to distinguish the three are: * Vagal maneuvers (such as carotid<unk>  massage or Valsalva's maneuver) to slow the rate and identification of P waves * administer AV blockers (e.g., adenosine, verapamil) to identify atrial flutter with 2:1 block Heart sounds should also be listened to. ECG characteristics * Rate: Greater than or equal to 100. * Rhythm: Regular. * P waves: Upright, in leads I, II and aVL, and negative in lead aVR; * each P wave is followed by a QRS and T waves Inappropriate<unk>  In inappropriate<unk>  (also known as chronic nonparoxysmal<unk> , patients have an elevated resting heart rate and/or exaggerated heart rate in response to exercise. These patients have no apparent heart disease or other causes of<unk> . IST is thought to be due to abnormal autonomic control. Postural orthostatic tachycardia syndrome Usually, in women with no heart problems, this syndrome is characterized by normal resting heart rate but exaggerated postural<unk>  with or without orthostatic hypotension.
Sinus tachycardia
Tachycardia
Sinus arrhythmia
Junctional tachycardia
Sinus bradycardia
Ventricular tachycardia
Inappropriate sinus tachycardia
Automatic tachycardia