- See: 
- Diff Dx of V tach 
- Discussion on SVT vs V tach
- Discussion: 
- regular ventricular rhythm: 100-200 BPM;
- patient may or may not be aware; 
- hypotension / shock / pulonary edema: 
- look for wide regular QRS whose rate exceeds Atrial rhythm 
- tend to have AV dissociation; (P wave marches thru QRS) 
- look for cannon a waves; 
- see QT Lengthening 
- ventricular tachycardia must be differentiated from sinus tachycardia w/ bundle branch block and SVT with aberrant condition