PROBLEM TO BE SOLVED: To provide a TWA measuring apparatus and TWA measuring method which can accurately measure the presence of TWA (T-wave alternans).SOLUTION: A TWA measuring apparatus includes: a grouping section which is configured to group electrocardiogram waveforms of a subject in increments of a certain beat number a storage section 114 which is configured to store the grouped electrocardiogram waveforms a testing section 116 which is configured to test a statistical intergroup difference of measurement values of the electrocardiogram waveforms of the stored groups a heartbeat condition determining section 118 which is configured to determine that a heartbeat condition is unstable, when a significant statistical difference exists between the groups and a TWA measuring section which is configured to measure in detail variation in heartbeat by using the stored electrocardiogram waveforms, when it is determined that the heartbeat condition is unstable.COPYRIGHT: (C)2014,JPO&INPIT【課題】TWA(T波交互脈)を高精度で計測する。【解決手段】被検者から取得する心電波形を一定の拍数刻みでグループ化するグループ化部112と、グループ化した心電波形を記憶する記憶部114と、記憶した各グループの心電波形の計測値のグループ間の統計的な差を検定する検定部116と、グループ間に統計的な有意差が有れば心拍の状態が不安定であると判断する心拍状態判断部118と、心拍の状態が不安定であると判断したときに記憶した心電波形を用いて心拍の変動を詳細に計測するTWA測定部と、を有する。【選択図】図2
