Left Ventricular Outflow Tract Tachycardias
نویسنده
چکیده
Left ventricular outflow tract tachycardia (LVOT-VT) is an uncommon type of idiopathic left ventricular tachycardia (ILVT) thought to be due to cyclic adenosine mono phosphate (cAMP) mediated triggered activity. The arrhythmia can be terminated pharmacologically with calcium channel blockers or beta-blockers [1]. LVOT-VT can arise above or below the coronary cusps and the former variety can also be called as aortic cusp VT. An S wave in lead I and a precordial R wave transition at V1 or V2 is common to both varieties of LVOT-VT. Absence of S wave in V5 or V6 may suggest supra cuspal origin while an Rs pattern in V5 or V6 may indicate an infracuspal origin [2].
منابع مشابه
lectrocardiographic recognition and ablation of outflow tract entricular tachycardia
a Outflow tract tachycardias comprise a subgroup of idioathic ventricular tachycardias (VTs) that occur in the abence of structural heart disease. The arrhythmia mechanism ppears to be calcium-dependent triggered activity, and no iscrete anatomic abnormalities have been identified. In our xperience, most of these outflow tract tachycardias origiate from a fairly narrow anatomic zone. These arrh...
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