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KMID : 1011920110120020054
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International Journal of Arrhythmia
2011 Volume.12 No. 2 p.54 ~ p.57
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ECG findings to diagnose supraventricular tachycardia
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Joung Bo-Young
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Abstract
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Often, the P waves of AV nodal reentry are seen just prior to or just after the end of the QRS and cause a subtle alteration in the QRS complex that results in a pseudo-S or pseudo-r’. The AV nodal reentry begins abruptly, usually following a premature atrial complex that conducts with a prolonged PR interval. The retrograde P wave of AV reciprocating tachycardia occurs after completion of the QRS complex, in the ST segment, or early in the T wave. The presence of an ipsilateral bundle branch block can facilitate reentry and cause the prolonging of the tachycardia cycle length. Finally, vagal maneuvers or an adenosine injection could help in case of differential diagnosis of regular narrow QRS tachycardias.
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KEYWORD
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AV nodal reentry, AV reciprocating tachycardia, ECG
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