A system for use in cardiac evaluation comprising: electrode apparatus comprising a plurality of external electrodes to be located proximate a patient's skin; a display (130,170) comprising a graphical user interface (132,172) to present information for use in assisting a user in at least one of assessing a patient's cardiac health, evaluating and adjusting cardiac therapy delivered to a patient, and navigating at least one implantable electrode to a region of the patient's heart; and computing apparatus comprising processing circuitry, the computing apparatus operably coupled to the electrode apparatus and the display, the computing apparatus configured to: monitor electrical activity from the patient's skin using the plurality of external electrodes for each of a plurality of different cardiac therapy scenarios, and generate and display, on the graphical user interface, a plurality of graphical maps of electrical activation based on the monitored electrical activity, each of the plurality of graphical maps of electrical activation corresponding to a different cardiac therapy scenario of the plurality of different cardiac therapy scenarios than each other; wherein each of the plurality of different cardiac therapy scenarios comprise at least one different pacing configuration, AV delay, and LV pacing site; and wherein the computing apparatus is further configured to: generate electrical heterogeneity information for each of the plurality of different cardiac therapy scenarios based on the monitored electrical activity; and display the electrical heterogeneity information proximate to each of the plurality of graphical maps of electrical activation corresponding to the same cardiac therapy scenario as the graphical map of electrical activation; and ranking the selected scenarios based on the heterogeneity information; and displaying a ranked list of the scenarios along with their corresponding heterogeneity information. electrode apparatus comprising a plurality of external electrodes to be located proximate a patient's skin; a display (130,170) comprising a graphical user interface (132,172) to present information for use in assisting a user in at least one of assessing a patient's cardiac health, evaluating and adjusting cardiac therapy delivered to a patient, and navigating at least one implantable electrode to a region of the patient's heart; and computing apparatus comprising processing circuitry, the computing apparatus operably coupled to the electrode apparatus and the display, the computing apparatus configured to: monitor electrical activity from the patient's skin using the plurality of external electrodes for each of a plurality of different cardiac therapy scenarios, and generate and display, on the graphical user interface, a plurality of graphical maps of electrical activation based on the monitored electrical activity, each of the plurality of graphical maps of electrical activation corresponding to a different cardiac therapy scenario of the plurality of different cardiac therapy scenarios than each other; wherein each of the plurality of different cardiac therapy scenarios comprise at least one different pacing configuration, AV delay, and LV pacing site; and monitor electrical activity from the patient's skin using the plurality of external electrodes for each of a plurality of different cardiac therapy scenarios, and generate and display, on the graphical user interface, a plurality of graphical maps of electrical activation based on the monitored electrical activity, each of the plurality of graphical maps of electrical activation corresponding to a different cardiac therapy scenario of the plurality of different cardiac therapy scenarios than each other; wherein each of the plurality of different cardiac therapy scenarios comprise at least one different pacing configuration, AV delay, and LV pacing site; and generate electrical heterogeneity information for each of the plurality of different cardiac therapy scenarios based on the monitored electrical activity; and display the electrical heterogeneity information proximate to each of the plurality of graphical maps of electrical activation corresponding to the same cardiac therapy scenario as the graphical map of electrical activation; and ranking the selected scenarios based on the heterogeneity information; and displaying a ranked list of the scenarios along with their corresponding heterogeneity information.