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Case Reports
. 2023 Apr 15;62(8):1167-1170.
doi: 10.2169/internalmedicine.0438-22. Epub 2022 Aug 30.

Swallowing-induced Atrial Tachycardia with a Thymic Cyst

Haruka Kameshima  1   2 , Toshiyuki Furukawa  2 , Shunichi Doi  1 , Osamu Tanaka  1 , Tomoo Harada  3 , Yoshihiro J Akashi  3
Affiliations
Case Reports

Swallowing-induced Atrial Tachycardia with a Thymic Cyst

Haruka Kameshima et al. Intern Med. .

Abstract

We herein report a 34-year-old man who presented with recurrent palpitations that occurred while swallowing solid food. Holter monitoring revealed atrial tachycardia (AT) while eating. In addition, chest computed tomography (CT) showed a small nodule in the front of the ascending aorta. Thoracoscopic surgery was performed to remove the nodule; a pathological examination revealed that the nodule was a thymic cyst. The AT disappeared postoperatively. This case demonstrates that a mediastinal nodule can cause swallowing-induced AT.

Keywords: mediastinal nodule; swallowing-induced atrial tachycardia; thymic cyst.

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Conflict of interest statement

The authors state that they have no Conflict of Interest (COI).

Figures

Figure 1.
Figure 1.
Initial electrocardiograph findings. A 12-lead electrocardiograph recording shows a normal sinus rhythm and a heart rate of 73 beats per minute (bpm) without any abnormality.
Figure 2.
Figure 2.
Findings of 24-hour Holter monitoring. Twenty-four-hour Holter monitoring shows an increase in atrial tachycardia occurrence during lunch (2 pm) and dinner (6 pm), with each episode lasting a few seconds. HR: heart rate
Figure 3.
Figure 3.
Computed tomography (CT) findings. Computed tomography shows a flat nodule in the anterior mediastinum (arrows).
See this image and copyright information in PMC

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