An ECG is very helpful in the diagnosis of<unk><unk>  tachycardia. Findings on an ECG suggestive or diagnostic of<unk><unk>  tachycardia include regular R-R intervals, rapid<unk>  rate with an indistinguishable atrial rate (absence of p-waves), Av dissociation, and a wide QRS complex (more 0.12 sec).
Pulseless ventricular tachycardia electrocardiogram
Junctional tachycardia electrocardiogram
AVNRT electrocardiogram
Atrial flutter electrocardiogram
Brugada syndrome electrocardiogram
Premature atrial contraction electrocardiogram
Catecholaminergic polymorphic ventricular tachycardia electrocardiogram
Junctional bradycardia electrocardiogram