Abstract: Methods of presenting medical test results include a plurality of test interpretation statements automatedly determined from medical test data. Each automatedly determined test interpretation statement includes a specificity value and a reliability value. A normalized quality is calculated for each of the plurality of test interpretation statements. A graphical display is operated to present a graphical user interface that includes a visual representation of the normalized quality of the plurality of test interpretation statements. A test interpretation statement is presented on the graphical user interface after a selection associated with the visual representations of the normalized quality of the plurality of test interpretation statements.

Abstract: A method for generating a cardiac electrical instability assessment is disclosed herein. The method includes obtaining a short duration T-wave alternans (SDTWA) measurement, obtaining a long duration T-wave alternans (LDTWA) measurement, and obtaining a cardiac electrical instability assessment based on both the SDTWA measurement and the LDTWA measurement.

Abstract: A method includes receiving audio files from a computer using a portable electronic device. The audio files are electrocardiograms obtained during exercise tests performed on patients and converted to an audio format. The method also includes performing audio playback of the audio files, receiving user input at the portable electronic device regarding an analysis of the patients based on the playback of the audio files, and compiling a list of a group of the patients selected for further investigation based on the user input.

Abstract: A method includes obtaining electrocardiograms during exercise tests performed on patients, converting the electrocardiograms to audio files, transferring the audio files to a portable electronic device for playback, and receiving a patient list from the portable electronic device. The patient list includes a list of a group of the patients identified for further investigation based on the playback of the audio files.

Abstract: A method for generating a cardiac electrical instability assesment is disclosed herein. The method includes obtaining a SDTWA measurement, obtaining a LDTWA measurement, and obtaining a cardiac electrical instability assessment based on both the SDTWA measurement and the LDTWA measurement.

Abstract: A system and method for the efficient implementation of a complex exercise test is disclosed. A rule interpreter synthesizes interpretation statements based upon the processing of collected physiological data and user entered data with a series of exercise test interpretation rules. These statements aid a clinician in interpreting exercise test results by identifying detected abnormal or borderline conditions.

Abstract: A method for evaluating a patient is disclosed herein. The method includes performing an exercise test on a patient, obtaining an electrocardiogram during the exercise test, converting the electrocardiogram to an audio file, and analyzing the audio file in order to evaluate the patient. A corresponding system for evaluating a patient is also provided.

Abstract: An apparatus and method for obtaining information, such as heart rate or the presence of atrial fibrillation, from electrodes applied to the feet of a subject. A scale having electrodes may be used for this purpose. The signal obtained from the electrodes is digitized and filtered to obtain an electrocardiographic signal exhibiting periodic, sequential, discrete, magnitudinal variations associated with the heartbeats of the subject. The electrocardiographic signal is then analyzed to identify discrete magnitudinal variations useful for obtaining the desired information. In determining the heart rate of the subject, an interval between variations having a desired magnitudinal characteristic may be employed. The absence of such variations is indicative of atrial fibrillation.

Abstract: A system and method for the efficient implementation of a complex exercise test is disclosed. A rule interpreter synthesizes interpretation statements based upon the processing of collected physiological data and user entered data with a series of exercise test interpretation rules. These statements aid a clinician in interpreting exercise test results by identifying detected abnormal or borderline conditions.

Abstract: A method and apparatus for analyzing a physiological waveform. The apparatus comprising an input terminal for connection to a patient to acquire the physiological waveform from a patient, an instrumentation amplifier connected to the input terminal to filter the physiological waveform, and an analysis module including a processor and software for operating the processor to detect cyclic artifact in the physiological waveform. The method comprising the acts of obtaining the physiological waveform and determining whether there is more than one independent complex rhythm within the digital physiological waveform.

Abstract: Method and apparatus for displaying alternans data of an electrocardiogram signal having a plurality of odd beats and a plurality of even beats. The method can include calculating an odd median complex for at least one of the plurality of odd beats, the odd median complex having a plurality of odd data points; calculating an even median complex for at least one of the plurality of even beats, the even median complex having a plurality of even data points; comparing the plurality of odd data points with the plurality of even data points to generate a plurality of difference data points; assigning each one of the plurality of difference data points a color corresponding to an amplitude; displaying the plurality of difference data points as a difference curve; and displaying a plurality of difference curves in a temporal alignment.

Abstract: An apparatus and method for obtaining information, such as heart rate or the presence of atrial fibrillation, from electrodes applied to the feet of a subject. A scale having electrodes may be used for this purpose. The signal obtained from the electrodes is digitized and filtered to obtain an electrocardiographic signal exhibiting periodic, sequential, discrete, magnitudinal variations associated with the heartbeats of the subject. The electrocardiographic signal is then analyzed to identify discrete magnitudinal variations useful for obtaining the desired information. In determining the heart rate of the subject, an interval between variations having a desired magnitudinal characteristic may be employed. The absence of such variations is indicative of atrial fibrillation.

Abstract: A method and system for improved measurement of T-wave alternans in an ECG signal is disclosed. The method and system comprise receiving digitized ECG data including a plurality of alternating consecutive odd and even beats, calculating a variability for at least one odd or even beat, and excluding certain beats from T-wave alternans measurements according to an exclusion procedure.

Abstract: Method and apparatus for displaying alternans data of an electrocardiogram signal having a plurality of odd beats and a plurality of even beats. The method can include calculating an odd median complex for at least one of the plurality of odd beats, the odd median complex having a plurality of odd data points; calculating an even median complex for at least one of the plurality of even beats, the even median complex having a plurality of even data points; comparing the plurality of odd data points with the plurality of even data points to generate a plurality of difference data points; assigning each one of the plurality of difference data points a color corresponding to an amplitude; displaying the plurality of difference data points as a difference curve; and displaying a plurality of difference curves in a temporal alignment.

Abstract: A method and system for improved measurement of T-wave alternans in an ECG signal is disclosed. The method and system comprise receiving digitized ECG data including a plurality of alternating consecutive odd and even beats, calculating a variability for at least one odd or even beat, and excluding certain beats from T-wave alternans measurements according to an exclusion procedure.

Abstract: A method and apparatus for analyzing a physiological waveform. The apparatus comprising an input terminal for connection to a patient to acquire the physiological waveform from a patient, an instrumentation amplifier connected to the input terminal to filter the physiological waveform, and an analysis module including a processor and software for operating the processor to detect cyclic artifact in the physiological waveform. The method comprising the acts of obtaining the physiological waveform and determining whether there is more than one independent complex rhythm within the digital physiological waveform.

Abstract: A method and apparatus for analyzing a physiological waveform. The apparatus comprising an input terminal for connection to a patient to acquire the physiological waveform from a patient, an instrumentation amplifier connected to the input terminal to filter the physiological waveform, and an analysis module including a processor and software for operating the processor to detect cyclic artifact in the physiological waveform. The method comprising the acts of obtaining the physiological waveform and determining whether there is more than one independent complex rhythm within the digital physiological waveform.

Abstract: An electrocardiogram processing technique for measuring T-wave alternans by which the alternating electrocardiogram signals are aligned to a target cubic spline. The target cubic spline is calculated on base of three isoelectric points namely a point before the P-wave, a point before the QRS-complex and a point after the T-wave. The aligned signals may then be further analyzed for variations such as T-wave alternans which are only present in alternating beats and which have diagnostic significance.

Abstract: A method is provided for determining the presence of a condition of a patient's heart. The method includes the steps of reading at least one parameter value of a biomedical signal of a patient and determining the likelihood of the presence of a condition of a patient's heart based on the at least one parameter value. The step of determining includes the step of comparing the at least one parameter value of the biomedical signal with all corresponding parameter values stored in a database.

Abstract: An electrocardiogram processing technique for measuring T-wave alternans by which the alternating electrocardiogram signals are aligned to a target cubic spline. The target cubic spline is calculated on base of three isoelectric points namely a point before the P-wave, a point before the QRS-complex and a point after the T-wave. The aligned signals may then be further analyzed for variations such as T-wave alternans which are only present in alternating beats and which have diagnostic significance.