Table 5

Diagnostic Value of Pacing Maneuvers during Supraventricular Tachycardialegend

Pacing Maneuver/ResultPercent of Tachycardias Maneuver AttemptedPercent Able to EntrainPercent Frequency of ResultSensitivity (%)Specificity (%)PPV (%)NPV (%)
AVNRTORTATAVNRTORTATAVNRTORTATAVNRTORTAT
Pace the atrium at 10–40 ms <SVT CL to entrain ventricle8987
 Fixed VA interval87979852718364351879617
Pace the atrium at the AV block CL69NA
 Termination dependent on AH809676844201169301886547
Pace the ventricle at 10–40 ms <SVT CL to entrain atrium9778
 Atrial activation same as SVT92100100020130643601001000
 A-V response after pacing94100100014890633701001000
 VA block CL >SVT CL7304886899820080416693
Ventricular pacing CL 200–250 ms91NA
 Termination w/o affecting atrium272737074786957430447383
 Ventricle dissociated from SVT161101695889375025456689
Ventricular extrastimulus during diastole80NA
 SVT terminates, atrium not affected, His bundle refractory3080941009701000427187
 SVT terminates, atrium affected, His bundle refractory100270801009201000387586
 SVT does not terminate, atrium affected, His bundle refractory120340761008801000377786
  • legend AT = atrial tachycardia; AVNRT = atrioventricular nodal reentry; AV = atrioventricular; CL = cycle length; NA = not applicable; NPV = negative predictive value; PPV = positive predictive value; ORT = orthodromic reciprocating tachycardia; SVT = supraventricular tachycardia; VA = ventriculoatrial.