Rhythm diagnosis in regular wide complex tachycardia
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VTach vs. SVT
| V Tach | SVT w/ Aberrancy | |
| Age | >50 | <35 |
| History | MI, CHF, CABG, MVR | MVR, WPW |
| Cannon A Waves | Present | Absent |
| Arterial Pulse | Variation | No variation |
| First heart sound | Variable | Not variable |
| Fusion Beats | Present | Absent |
| AV dissociation | Present | Absent |
| QRS | >0.14sec | <0.14sec |
| Axis | Extreme LAD (< -30) | Normal or slightly abnl |
| Vagal Maneuvers | No response | Slows or terminates |
|
QRS morphology V1 positive pattern |
V1 - R or qR V6 - rS |
V1 - RSR' V6 - Rs |
|
QRS morphology V1 negative pattern |
V1/V2 - Broad R wave (>40msec) V6 - Any Q or QS |
V1/V2 - Small R V6 - no Q |
See Also
Source
7/2/09 Pani 4/2/10 Niemann