Artigo Acesso aberto

Supraventricular tachycardia in a patient with Lown-Ganong-Levine syndrome associated with apical hypertrophic cardiomyopathy.

1988; Japanese Heart Journal Assoc; Volume: 29; Issue: 2 Linguagem: Inglês

10.1536/ihj.29.249

ISSN

1573-8612

Autores

Motonobu Hayano, Yoichi Imamura, Mitsuhiro Tsuruta, Junichi Inoue, Hiroshi Nakashima, Kuniaki FUKUYAMA, Yoshiki Eguchi, Shinsuke Tsuji, Shuzo Matsuo, Katsusuke Yano,

Tópico(s)

Cardiac Structural Anomalies and Repair

Resumo

Electrophysiologic study of a 55-year-old patient with Lown-Ganong-Levine syndrome associated with apical hypertrophic cardiomyopathy is reported. The patient had a history of recurrent attacks of tachyarrhythmia and his electrocardiogram showed a short P-R interval (0.10 see) with narrow QRS complex and left ventricular hypertrophy with giant negative T waves. His cineangiogram showed severe apical hypertrophy. An electrophysiologic study was performed. The results of programmed atrial pacing show the existence of the dual A-V nodal pathways. The A-H interval at rapid atrial pacing increased maximally by 103 msec. Atrial stimulation could depolarize parts of the atrium without altering the supraventricular tachycardia. These findings suggested that preferential rapidly conducting A-V nodal and intranodal reentry are the responsible mechanisms in this reciprocating tachycardia.We conclude that the short P-R interval was due to intranodal reentry through the dual A-V nodal pathways. To our knowledge, a case of Lown-Ganong-Levine syndrome with apical hypertrophic cardiomyopathy has not been previously described in the literature.

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