Abstract: A method for heart monitoring, the method may include monitoring a heart of a person to provide heart condition information; storing the heart condition information; sensing a provision of a countershock to the person, by a defibrillator, or receiving an indication from the defibrillator about the provision of the countershock; and outputting to an output device that differs from the defibrillator, certain heart condition information related to a certain time period that precedes the provision of the countershock, wherein the certain heart condition information is related to a triggering of the provision of the countershock.

Abstract: An electrocardiographic system, the electrocardiographic system includes: (i) a processor, adapted to receive three electrocardiographic signals and to provide a cardiological problem indication in response to the three electrocardiographic signals, wherein each of the three electrocardiographic signals is detected between a different pair of electrodes out of a electrode group that consists of three electrodes located on a body of a patient; and (ii) an interface, adapted to transmit the cardiological problem indication received from the processor.