A heart monitoring method in which ECG signals are recorded at the heart of a patient and on the basis of which a space vector is determined using vectorcardiography, wherein this space vector represents the course of the sum vector of the electrical field of the heart and has a direction corresponding to the field direction and a length corresponding to the potential, characterized in that a quotient is formed from the areas covered by a length of the space vector (= radius vector) as a function of time during the R-wave and during the T-wave, respectively, wherein this quotient is then subjected to further evaluation taking into account at least one predetermined limit value, in order to verify the presence of coronary heart disease and / or cardiac arrhythmia for a patient, wherein coronary heart disease is detected for the screened heart if the quotient formed from the areas covered by the space vector during the R-wave and during the T-wave, respectively Area R-wave Area T-wave = a is located outside a range defined by a lower limit value a 0,KHK and an upper limit value a 1,KHK, and that the limit values a 0,KHK and a 1,KHK are determined as a function of a training set, wherein the lower and upper limit values a 0 and a 1 are respectively determined by a training set of test person data, comprising the steps: (i) calculating the quotient area (R-wave) / area (T-wave) for all test persons to obtain time series ratios; (ii) calculating a mean value (μ) and an associated standard deviation (σ) from the time series ratios of step (i); and (iii) determining the lower limit a 0 taking into account the mean value (μ) and the standard deviation (σ) of step (ii), by the relationship: a 0 = mean value ( μ) + standard deviation ( σ), and / or determining the upper limit a 1 taking into account the mean value (μ) and the standard deviation (σ) of step (ii), by the relationship: a 1 = mean value ( μ) + standard deviation ( σ), wherein in step (ii) the mean value and the associated standard deviation are calculated only for time series ratios of healthy patients ("- -"). that a quotient is formed from the areas covered by a length of the space vector (= radius vector) as a function of time during the R-wave and during the T-wave, respectively, wherein this quotient is then subjected to further evaluation taking into account at least one predetermined limit value, in order to verify the presence of coronary heart disease and / or cardiac arrhythmia for a patient, wherein coronary heart disease is detected for the screened heart if the quotient formed from the areas covered by the space vector during the R-wave and during the T-wave, respectively Area R-wave Area T-wave = a is located outside a range defined by a lower limit value a 0,KHK and an upper limit value a 1,KHK, and that the limit values a 0,KHK and a 1,KHK are determined as a function of a training set, wherein the lower and upper limit values a 0 and a 1 are respectively determined by a training set of test person data, comprising the steps: (i) calculating the quotient area (R-wave) / area (T-wave) for all test persons to obtain time series ratios; (ii) calculating a mean value (μ) and an associated standard deviation (σ) from the time series ratios of step (i); and (iii) determining the lower limit a 0 taking into account the mean value (μ) and the standard deviation (σ) of step (ii), by the relationship: a 0 = mean value ( μ) + standard deviation ( σ), and / or (i) calculating the quotient area (R-wave) / area (T-wave) for all test persons to obtain time series ratios; (ii) calculating a mean value (μ) and an associated standard deviation (σ) from the time series ratios of step (i); and (iii) determining the lower limit a 0 taking into account the mean value (μ) and the standard deviation (σ) of step (ii), by the relationship: a 0 = mean value ( μ) + standard deviation ( σ), and / or determining the upper limit a 1 taking into account the mean value (μ) and the standard deviation (σ) of step (ii), by the relationship: a 1 = mean value ( μ) + standard deviation ( σ), wherein in step (ii) the mean value and the associated standard deviation are calculated only for time series ratios of healthy patients ("- -").