PROBLEM TO BE SOLVED: To provide an electrocardiograph equipped with a function to calculate an index value indicating a symptom in which an irregular pulse is suspected in a rhythm measurement inspection, and an index value calculation program.SOLUTION: An electrocardiograph having a plurality of inspection modes including a rhythm measurement inspection mode for measuring time intervals between R waves measures the intervals between sequentially adjacent R waves based on an electrocardiographic waveform, calculates an index value on variations of the intervals between the measured R waves, and displays a message if an irregular pulse is suspected based on the calculated index value.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2017,JPO&INPIT【課題】リズム計測検査において不整脈が疑われる兆候を表わす指標値を算出する機能を備えた心電計および指標値算出プログラムを提供する。【解決手段】R波どうしの時間間隔を測定するリズム計測検査モードを含む複数の検査モードを有する心電計であって、心電波形に基づいて、順次に隣接するR波どうしの間隔を測定し、測定されたR波どうしの間隔のばらつきの指標値を算出し、算出された指標値に基づいて不整脈が疑われる場合にメッセージを表示する。【選択図】図7
