PROBLEM TO BE SOLVED: To take a measure for securing safety of a patient before he/she faints even in the case that the patient is to faint as ventricular fibrillation occurs.SOLUTION: An implantable medical device 1 includes: an electrocardiograph signal detection part 5 for detecting electrocardiograph signals a premature contraction determination part 6 for determining whether or not at least one of the time width, occurrence frequency and occurrence timing of ventricular premature contraction has exceeded a predetermined reference value, on the basis of the electrocardiograph signals detected by the electrocardiograph signal detection part 5 and a reporting part 7 for reporting to the outside in the case that at least one of them has exceeded the reference value by the premature contraction determination part 6.COPYRIGHT: (C)2012,JPO&INPIT【課題】心室細動の発生に伴って患者が失神する場合においても、失神前に患者の安全を確保する方策をとることを可能とする。【解決手段】心電信号を検出する心電信号検出部5と、該心電信号検出部5により検出された心電信号に基づいて、心室性期外収縮の時間幅、発生頻度または発生タイミングの少なくとも1つが予め定められた基準値を超えているか否かを判定する期外収縮判定部6と、該期外収縮判定部6により、基準値を超えていると判定された場合に、外部に報知する報知部7とを備える体内埋込型装置1を提供する。【選択図】図1
