An apparatus for producing information indicative of cardiac condition comprises a processing system (301) for receiving a rotation signal indicative of rotational movement of a chest. The processing system is configured to form one or more indicator quantities each being derivable from an energy spectral density based on one or more samples of the rotation signal, where each sample has a temporal length. The processing system is configured to determine an indicator of cardiac condition on the basis of the one or more indicator quantities. The determination of the cardiac condition is based on that for example myocardial infarction causes changes in the energy spectral density. Thus, it is possible to distinguish between for example myocardial infarction and plain heartburn.一種用於產生指出心臟的狀況的資訊之設備,其係包括一用於接收一指出一胸腔的旋轉的運動的旋轉信號的處理系統(301)。該處理系統係被配置以形成一或多個指標量,每一個指標量係可以根據該旋轉信號的一或多個樣本而從一能量頻譜密度導出的,其中每一個樣本係具有一時間的長度。該處理系統係被配置以該一或多個指標量為基礎來決定心臟的狀況的一指標。該心臟的狀況的決定是根據例如是心肌梗塞係造成在該能量頻譜密度上的改變而定的。因此,區別例如是心肌梗塞與單純的心口灼熱感是可能的。