Neurally Mediated Syncope and Arrhythmias A Study of Syncopal Patients Using The Head-up Tilt Test

Makoto Shinohara; Youichi Kobayashi; Chiaki Obara; Akira Miyata; Kazumi Chiyoda; Haruyuki Nakagawa; Kaoru Tanno; Shuji Kikushima; Takao Baba; Takashi Katagiri

doi:10.1253/jcj.63.339

Clinical Study

Neurally Mediated Syncope and Arrhythmias

A Study of Syncopal Patients Using The Head-up Tilt Test

Makoto Shinohara, Youichi Kobayashi, Chiaki Obara, Akira Miyata, Kazumi Chiyoda, Haruyuki Nakagawa, Kaoru Tanno, Shuji Kikushima, Takao Baba, Takashi Katagiri

Author information

Makoto Shinohara
Third Department of Internal Medicine, Showa University School of Medicine
Youichi Kobayashi
Third Department of Internal Medicine, Showa University School of Medicine
Chiaki Obara
Third Department of Internal Medicine, Showa University School of Medicine
Akira Miyata
Third Department of Internal Medicine, Showa University School of Medicine
Kazumi Chiyoda
Third Department of Internal Medicine, Showa University School of Medicine
Haruyuki Nakagawa
Third Department of Internal Medicine, Showa University School of Medicine
Kaoru Tanno
Third Department of Internal Medicine, Showa University School of Medicine
Shuji Kikushima
Third Department of Internal Medicine, Showa University School of Medicine
Takao Baba
Third Department of Internal Medicine, Showa University School of Medicine
Takashi Katagiri
Third Department of Internal Medicine, Showa University School of Medicine

Keywords: Arrhythmias, Head-up tilt test, Neurally mediated syncope

JOURNAL FREE ACCESS

1999 Volume 63 Issue 5 Pages 339-342

DOI https://doi.org/10.1253/jcj.63.339

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Abstract

Understanding the causes of syncope in patients with arrhythmia is important in determining the therapeutic interventions. Neurally mediated syncope (NMS) was evaluated in 55 patients with various arrhythmias. The head-up tilt test with or without isoproterenol infusion induced NMS in 41 (74%) patients. When these patients was categorized into 3 types, depending on the development of syncope, vasodilatation was significant in a majority of patients. In 46% of patients with tachyarrythmias, NMS was accompanied by an increase in extrasystole. It was concluded that the evaluation of vasodilatation is important for the preventive strategy of NMS in patients with arrhythmias and that NMS may induce arrhythmias. (Jpn Circ J 1999; 63: 339 - 342)

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