Abstract
Right ventricular outflow tract (RVOT) aneurysm is a rare cause of RVOT ventricular tachycardia (RVOT-VT). We present a very unusual case of RVOT-VT due to an RVOT aneurysm diagnosed by cardiovascular magnetic resonance imaging.
Highlights
Right ventricular outflow tract ventricular tachycardia (RVOT-VT) is a type of monomorphic ventricular tachycardia originating from RVOT or usually from tricuspid annulus
The RVOT-VT occasionally occurs in patients without an underlying structural heart disease, it may be related to focal anatomical and wall motion abnormalities
The RVOT aneurysms may rarely occur as an unusual reason of the RVOT tachycardia in adult patients [9,10,11]
Summary
Right ventricular outflow tract ventricular tachycardia (RVOT-VT) is a type of monomorphic ventricular tachycardia originating from RVOT or usually from tricuspid annulus. The RVOT-VT occasionally occurs in patients without an underlying structural heart disease, it may be related to focal anatomical and wall motion abnormalities. These abnormalities of the RVOT include wall thinning, presence of the fatty fibrous tissue (context of arrhythmogenic right ventricular dysplasia), and aneurysms [1,2,3,4,5]. The RVOT aneurysms may rarely occur as an unusual reason of the RVOT tachycardia in adult patients [9,10,11] These aneurysms are best seen on the cardiovascular magnetic resonance imaging (CMRI) and frequently missed by other imaging modalities such as echocardiography or electrophysiological study. We report an adult case of the RVOT aneurysm as an unusual cause of RVOT-VT with CMRI findings
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