Abstract: A method for generating a graphical performance display, including: receiving performance measure data; generating a graphical rectangular plot, having a first side indicating a prevalence value, a second side indicating a sensitivity value, and third side indicating a specificity value, wherein the second and third sides are opposite one another and a fourth side is opposite the first side; drawing a prevalence line perpendicular to the first side between the first side and the fourth side based upon a prevalence value in the performance measure data; drawing a sensitivity line perpendicular to the second side between the second side and the prevalence line based upon a sensitivity value in the performance measure data; and drawing a specificity line perpendicular to the third side between the third side and the prevalence line based upon a sensitivity value in the performance measure data.

Abstract: An acute ischemia detection device comprises a 12-lead electrocardiograph (ECG) device (12), an electronic data processing device (12), and a display component (22). The electronic data processing device applies 12-lead ECG to vessel-specific lead (VSL) transforms (50) to 12-lead ECG data acquired by the 12-lead ECG device to generate VSL lead data (e.g., LAD, LCX, and RCA vessel-specific lead data), determines ST values for the VSL lead data, and decides whether the 12-lead ECG data acquired by the 12-lead ECG device indicates acute ischemia by comparing the ST values for the VSL lead data with VSL lead ST thresholds (60). The display component may display an acute ischemia alarm or warning if the decision is the 12-lead ECG data acquired by the 12-lead ECG device indicates acute ischemia, and/or may display the generated VSL lead ECG traces.

Abstract: Disclosed herein are methods and systems providing improvements enhancing speed and accuracy in interpreting the electrocardiogram (ECG) for ischemia identification using a graphical presentation. An ischemia criteria and ST segment measurements to be tested are graphically presented simultaneously. The graphical presentation allows the violation of the ischemia criteria to be visualized without any ambiguity. To further ensure that such a condition will not be overlooked, additional graphical highlighting is provided. This graphical approach can be used to improve the detection of conditions that fulfill the specified ischemia criteria and reduce the variation of individual interpretation for patients with border-line ST segment changes.

Abstract: An acute ischemia detection device comprises a 12-lead electrocardiograph (ECG) device (12), an electronic data processing device (12), and a display component (22). The electronic data processing device applies 12-lead ECG to vessel-specific lead (VSL) transforms (50) to 12-lead ECG data acquired by the 12-lead ECG device to generate VSL lead data (e.g., LAD, LCX, and RCA vessel-specific lead data), determines ST values for the VSL lead data, and decides whether the 12-lead ECG data acquired by the 12-lead ECG device indicates acute ischemia by comparing the ST values for the VSL lead data with VSL lead ST thresholds (60).

Abstract: A system for determining the Q and J points of an electrocardiogram (ECG) combines a WLT-based Q, J detection algorithm with signal quality assessment for lead selection. A Q, J detector (24) receives a beat-cycle waveform for the beat under consideration from each of a plurality (N) of ECG leads, and assesses signal quality for each lead using signal quality assessor (SQA) components 261, 262 . . . 26N. The leads with “good” signal qualities are employed for a multichannel waveform length transform (WLT), which yields a combined waveform length signal (CWLS). The Q and J points are then determined from the CWLS.

Abstract: Disclosed herein are methods and systems providing improvements enhancing speed and accuracy in interpreting the electrocardiogram (ECG) for ischemia identification using a graphical presentation. An ischemia criteria and ST segment measurements to be tested are graphically presented simultaneously. The graphical presentation allows the violation of the ischemia criteria to be visualized without any ambiguity. To further ensure that such a condition will not be overlooked, additional graphical highlighting is provided. This graphical approach can be used to improve the detection of conditions that fulfill the specified ischemia criteria and reduce the variation of individual interpretation for patients with border-line ST segment changes.

Abstract: A system for determining the Q and J points of an electrocardiogram (ECG) combines a WLT-based Q, J detection algorithm with signal quality assessment for lead selection. A Q, J detector (24) receives a beat-cycle waveform for the beat under consideration from each of a plurality (N) of ECG leads, and assesses signal quality for each lead using signal quality assessor (SQA) components 261, 262 . . . 26N. The leads with “good” signal qualities are employed for a multichannel waveform length transform (WLT), which yields a combined waveform length signal (CWLS). The Q and J points are then determined from the CWLS.