Wide QRS complex tachycardia responsive to both ATP and verapamil

No obvious structural heart disease was detected during physical examination, resting electrocardiography, chest radiography, or echocardiography. In this case, Rs was distinctively seen in lead V1, but an initial R wave in lead aVR was not observed. [...]the pharmacological responses of this tachyc...

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Bibliographic Details
Published in:Journal of arrhythmia 2012-02, Vol.28 (1), p.75-77
Main Author: Nishizaki, Mitsuhiro
Format: Article
Language:English
Subjects:
Cardiac arrhythmia
Cardiovascular
Cardiovascular disease
Diagnosis
Electrocardiogram
Electrocardiography
Sinuses
Stress (Psychology)
Tachycardia
Citations: Items that this one cites
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Description
Summary:No obvious structural heart disease was detected during physical examination, resting electrocardiography, chest radiography, or echocardiography. In this case, Rs was distinctively seen in lead V1, but an initial R wave in lead aVR was not observed. [...]the pharmacological responses of this tachycardia to the administration of both ATP and verapamil are more consistent with SVT than VT, although VT due to triggered activity is also occasionally terminated with these agents [5]. VT from LVOT is not as common as that from the right ventricular outflow tract (RVOT) and comprises 10–18% of wholly idiopathic, adenosine-sensitive VTs. [...]the mechanism of VTs originating from the LVOT is mostly thought to be cAMP-mediated triggered activity similar to that of VTs originating from the RVOT since the former suppress the slow-inward current directly by modulating the L-type calcium channel or indirectly by inhibiting the production of cellular cAMP [5].
ISSN:1880-4276
1883-2148
DOI:10.1016/j.joa.2012.02.012