Narrow QRS complex tachycardia: What is the mechanism?
نویسندگان
چکیده
منابع مشابه
Regular, narrow QRS, long RP tachycardia – what is the mechanism?
We report the case of a 45-year-old male patient who was referred to our department due to palpitations for the last six months, with documented episodes of regular, long RP, narrow QRS tachycardias (Fig. 1). The patient had no history of structural heart disease, his transthoracic echocardiography demonstrated normal systolic and diastolic function and the thyroid function tests were within no...
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A 57-year-old woman underwent an electrophysiology procedure because of a 19-year history of recurrent palpitations. Typical AV nodal reentrant tachycardia that had a cycle length of 460 msec was induced by ventricular pacing. Slow pathway ablation was attempted using a combined anatomical and electrogramguided approach. After an application of radiofrequency energy associated with junctional e...
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A 42-year-old woman was referred for radiofrequency catheter ablation of narrow QRS tachycardia that was terminated with intravenous adenosine. Baseline twelve-lead ECG was normal during sinus rhythm and transthoracic echocardiography demonstrated no evidence of structural heart disease. The electrophysiological study showed a normal AH interval of 114 ms and HV interval of 37 ms during sinus r...
متن کاملTermination of a narrow QRS-complex tachycardia: what is the mechanism?
A 27-year-old man with a 10-year history of recurrent episodes of paroxysmal supraventricular tachycardia underwent an electrophysiologic procedure. The baseline sinus cycle length was 860 msec, and the atrial-His (AH) and Hisventricular (HV) intervals were 80 and 45 msec, respectively. A narrow QRS-complex tachycardia was induced by atrial overdrive pacing. The cycle length of the tachycardia ...
متن کاملInteresting response of narrow QRS tachycardia to premature atrial complex. What is the mechanism?
Fig.1 shows a premature atrial complex (PAC) introduced during a narrow QRS tachycardia. What is the response and what is the interpretation? The tachycardia is a regular RBBB tachycardia with cycle length of 440 ms and ventriculo-atrial interval of 30 ms. There is near simultaneous activation of atrium and ventricle during tachycardia. Presence of His deflection prior to the QRS makes ventricu...
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ژورنال
عنوان ژورنال: Heart Rhythm
سال: 2013
ISSN: 1547-5271
DOI: 10.1016/j.hrthm.2012.08.012