the invention relates to the detection of electrical and mechanical cardio - vascular activities of a patient , especially to early decompensation detection of congestive heart failure patients . the device according to the invention comprises a transmitter for transmitting electromagnetic signals of a predefined frequency into the chest of the patient , a doppler radar sensor 1 for detecting a doppler radar signal reflected in the patient &# 39 ; s chest , and an ecg unit 3 for capturing an ecg signal of the patient &# 39 ; s heart . this device allows for simultaneous detection of electrical and mechanical cardio - vascular activities of a patient which can be used in an easy and reliable way and which allow for implementation in a hand - held or wearable device .