text: Most<unk><unk> s have a narrow QRS complex on the EKG.  It is not infrequent, however, for aberrant conduction to be be present, sometimes as a result of the more rapid rate of conduction.  This widening of the QRS complex yields<unk><unk>  with aberrant conduction <unk> AC) which produces a wide-complex<unk>  that may mimic ventricular<unk>  <unk> .  In the clinical setting, it is important to determine whether a wide-complex<unk>  is an<unk>  or a ventricular<unk> , since they are treated differently.  Ventricular<unk>  has to be treated appropriately, since it can quickly degenerate to ventricular fibrillation and death. A number of different algorithms have been devised to determine whether a wide complex<unk>  is<unk>  or ventricular in origin.
  In general, a history of structural heart disease, ischemic heart disease or congestive heart failure increases the likelihood that the<unk>  is ventricular in origin.
option_0: Supraventricular tachycardia differentiating SVT from VT
option_1: Second degree AV block echocardiography
option_2: Third degree AV block echocardiography
option_3: Stress cardiomyopathy electrocardiogram
option_4: Sick sinus syndrome electrocardiogram
option_5: First degree AV block echocardiography
option_6: Pacemaker syndrome electrocardiogram
option_7: Ventricular fibrillation electrocardiogram