陣發性快速不整脈病患通常會有恐慌症的經驗，然而陣發性快速不整脈可能被誤診、沒被察覺或電氣生理檢查不完備而延誤下來。將單一醫學中心1996年至2007年電氣生理學研究登錄的758個陣發性快速不整脈病患給予追蹤調查。陣發性快速不整脈癥候和恐慌症皆予以客觀和主觀的評估。至於病史資料和追蹤資料之取得則採用標準化問卷電話訪問。電氣生理學研究診斷出來的連續758個陣發性快速不整脈病患中，有效資料達705人(93%)。電氣生理學研究病患的平均年齡為52歲，66%是女性病患，從初次發作到確切診斷為快速不整脈的平均時間為2.1年。第一次診斷的科別急診佔35%，心臟內科佔36%，其他第一線照顧醫生佔26%。幾乎所有的病患皆有心悸和呼吸短促的症狀，46%的病患更達到恐慌症的診斷標準。未被確認的快速不整脈之症狀疑似恐慌症，陣發性快速不整脈的確診病患中有46%同時達到恐慌症的診斷標準。當恐慌症初次被診斷出來時，它耽誤了潛伏的快速不整脈之診治，因此，當診斷為恐慌症時，醫生必須高度警覺是否有快速不整脈之問題。

Panic symptoms are commonly experienced by patients with paroxysmal tachyarrhythmia, but the diagnosis of paroxysmal tachyarrhythmia is often missed or delayed due to the lack of awareness or insufficient rhythm detection techniques. A retrospective survey of the medical records of 758 consecutive patients with paroxysmal tachyarrhythmia documented by electrophysiologic studies from 1996 to 2007 in one medical center was conducted. Objective and subjective assessments of paroxysmal tachyarrhythmia symptomatology and panic disorder were made. Historical and follow-up data were obtained in telephone interviews using a standardized questionnaire. Of 758 consecutive patients diagnosed with tachyarrhythmia by electrophysiologic studies, useful data for 705 (93%) patients were obtained. The median age of patients at the time of electrophysiologic study was 52 years; 66% of the patients were female. The median time from initial attack to definitive diagnosis oftachyarrhythmia was 2.1 years. The first evaluations were performed by physicians in emergency departments (35%), cardiologists (36%), and primary care physicians (26%). Almost all patients had symptoms of palpitation and shortness of breath; 46% of the patients fulfilled the diagnostic criteria for panic disorder. Symptoms of unrecognized tachyarrhythmia mimicked panic disorder, with 46% of the patients with documented paroxysmal tachyarrhythmia also fulfilling the diagnostic criteria for panic disorder. When panic disorder was initially diagnosed, it delayed the diagnosis of underlying tachyarrhythmia. Physicians must have a high suspicion for tachyarrhythmia when diagnosing panic disorder