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RVOT vs ARVD/C
Right ventricular outflow tract tachycardia (RVOT) can present similarly to ARVD/C. Refer to the chart below to compare the two.
|Family History of Arrhythmia or Sudden Cardiac Death||No|
|Arrhythmias||PVBs, nonsustained VT or sustained VT at rest or with exercise||Same|
Sudden Cardiac Death
1% per year
Frontal Plan QRS
|Positive in leads III and AVF, negative in lead AVL||Inferior or Superior|
|T-wave Morphology||T wave upright V2-V5||T wave inverted beyond V1|
|Parietal Block||QRS duration <110 msec in V1, V2 or V3||QRS duration > 110 msec|
|T-wave Morphology & Parietal Block||84% sensitivity and 100% specificity|
|Epsilon Wave V1-V3||Absent|
|Signal Averaged ECG||Normal|
Increased RV size and/or wall motion abnormalities
|RV Ventriculogram||Usually Normal||Usually Abnormal|
|MRI||Usually Normal, but data in literature is conflicting||increased signal intensity of RV free wall; wall motion abnormalities with CINE MRI|
|Response to Therapy||Acute|
Adenosine, Beta-blockers Verapamil
Chronic Beta-blockers or verapamil +/- class one antiarrhythmic drugs
|Seldom Curative; may modify substrate to permit AA drugs effective|
Arrhythmias or different morphology tend to occur