x It is possible (though unlikely) that tachycardia is in fact AVNRT yet atrial activation following the PVC is different than that during SVT. Because there can be multiple slow pathways it is ...

such as in ventricular tachycardia or complete heart block. Treatment is aimed at the primary cause. The differential diagnosis for sinus tachycardia includes: ...

Sinus tachycardia is recognized on an ECG with a normal upright P wave in lead II preceding every QRS complex. This indicates that the pacemaker is coming from the sinus node and not elsewhere in ...