ECG is the first diagnostic test that should be obtained in hemodynamically stable Ventricular tachycardia. For detection of tachyarrhythmia symptoms related exercise such as cathecolaminergic polymorphic VT, Exercise stress test is recommended. Findings on resting ECG associated with diagnosis of VT include evidence of  structural hear disease such as prior MI or chamber enlargement, evidence of inherited arrhythmia disorders such as long QT syndrome, Brugada syndrome, arrhythmogenic right ventricular cardiomyopathy. QRS duration and conduction abnormality may have prognostic value in structural heart disease.
Ventricular tachycardia diagnostic study of choice
Atrial flutter diagnostic study of choice
Pulseless ventricular tachycardia diagnostic study of choice
Second degree AV block diagnostic study of choice
Third degree AV block diagnostic study of choice
Catecholaminergic polymorphic ventricular tachycardia diagnostic study of choice
Junctional tachycardia other diagnostic studies
Pulseless ventricular tachycardia other diagnostic studies