An apparatus configured to provide an automated cardiac diagnostics, the apparatus comprising: a housing (3, 31, 32) comprising at least four electrodes connected to a processor within the housing; a resistive network connecting two of the at least four electrodes and forming a central point between the two electrodes; wherein the processor is configured to: acquire a first set of at least three orthogonal leads from a patient's chest and hands at a first time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; acquire a second set of at least three orthogonal leads from the patient's chest and hands a second time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; perform a beat alignment on the first and second sets of at least three orthogonal leads to synchronize representative beats from the first and second sets of at least three orthogonal leads; calculate a difference signal representing the change between the first and second at least three orthogonal leads; detect cardiac changes suggestive of a cardiac condition by comparing parameters of the first and second at least three orthogonal leads or by comparing parameters of the difference signal to a predefined threshold; and communicate cardiac changes from the device to the patient. a housing (3, 31, 32) comprising at least four electrodes connected to a processor within the housing; a resistive network connecting two of the at least four electrodes and forming a central point between the two electrodes; wherein the processor is configured to: acquire a first set of at least three orthogonal leads from a patient's chest and hands at a first time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; acquire a second set of at least three orthogonal leads from the patient's chest and hands a second time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; perform a beat alignment on the first and second sets of at least three orthogonal leads to synchronize representative beats from the first and second sets of at least three orthogonal leads; calculate a difference signal representing the change between the first and second at least three orthogonal leads; detect cardiac changes suggestive of a cardiac condition by comparing parameters of the first and second at least three orthogonal leads or by comparing parameters of the difference signal to a predefined threshold; and communicate cardiac changes from the device to the patient. acquire a first set of at least three orthogonal leads from a patient's chest and hands at a first time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; acquire a second set of at least three orthogonal leads from the patient's chest and hands a second time, wherein at least one lead is formed between one of the said electrodes and the central point formed by mutually connecting at least two electrodes by the resistive network; perform a beat alignment on the first and second sets of at least three orthogonal leads to synchronize representative beats from the first and second sets of at least three orthogonal leads; calculate a difference signal representing the change between the first and second at least three orthogonal leads; detect cardiac changes suggestive of a cardiac condition by comparing parameters of the first and second at least three orthogonal leads or by comparing parameters of the difference signal to a predefined threshold; and communicate cardiac changes from the device to the patient.