PROBLEM TO BE SOLVED: To provide a device and a method for measuring central blood pressure which enable exact and easy measurement of the central blood pressure, and a device for measuring a heart load which enables exact measurement of the degree of stress on the heart on the basis of the measured central blood pressure.SOLUTION: The device 1 for measuring a heart load, including the device 52 for measuring the central blood pressure, computes a triple product from first cardiac sound amplitude data in measurement showing the amplitude value of a first cardiac sound, second cardiac sound amplitude data in measurement showing the amplitude value of a second cardiac sound and heart rate data showing the heart rate and can detect the optimum motion intensity from heart load data. The device 52 for measuring the central blood pressure is equipped with a cardiac sound sampling means 3 which samples the cardiac sound of a person to be measured and outputs it as cardiac sound data, a second cardiac sound extracting means 51 which detects the second cardiac sound from the cardiac sound data, measures the amplitude value and makes it the second cardiac sound amplitude data in measurement, and a central blood pressure estimating means 508 which computes a central blood pressure value in measurement from central blood pressure data in ataraxia, based on the ratio between the second cardiac sound amplitude data in measurement and the amplitude data in ataraxia.COPYRIGHT: (C)2012,JPO&INPIT【課題】中心血圧を正確に、かつ容易に測定できる中心血圧測定装置および中心血圧測定方法、測定された中心血圧に基づいて心臓に対するストレスの度合いが正確に測定できる心臓負荷測定装置を提供する。【解決手段】心臓負荷測定装置1は、中心血圧測定装置52を含み、第1心音の振幅値を示す第1心音測定時振幅データ、第2心音の振幅値を示す第2心音測定時振幅データ、および心拍数を示す心拍数データとから三重積を演算して心臓負荷データから至適運動強度を検出することができる。中心血圧測定装置52は、被測定者の心音を採取して心音データとして出力する心音採取手段3と、心音データから第2心音を検出し、振幅値を測定して第2心音測定時振幅データとする第2心音抽出手段51と、第2心音測定時振幅データと平静時振幅データとの比率に基づいて、平静時中心血圧データから測定時の中心血圧値を演算する中心血圧推定手段508とを備えている。【選択図】図2
