Acquiring accurate downhole pressure data for casing shoe test interpretation and real-time decision making is critical to the delivery of a safe, efficient, and cost-effective well. With modern logging-while-drilling (LWD) technology, pressure profiles from a formation integrity test (FIT) or leak-off test (LOT) can now be measured during wellbore pressurization, stored in the memory of the downhole tool, and transmitted in a compressed 60-point pressure versus-time data format via mud-pulse telemetry when circulation is re-established. This data are decoded and decompressed at the surface to provide a detailed downhole flow-off pressure profile. If a higher-resolution data set is required, a "zoom" function using the same telemetry loop can be affected over a selected (smaller) time interval to provide another 60 (enhanced) pressure points. The ability to transmit these data sets real-time, without a special downlink, saves rig time and ensures quality data as well as test objectives are attained before terminating the test. FIT's are routinely carried out to determine the fracture gradient around the casing shoe (shoe strength), or the maximum pressure the wellbore can withstand with regard to the casing setting depth. The pressure profile can also provide an indication of the quality of the cement bond around the casing shoe. While picking an inflection point from the pressure-versus-time plot seems straightforward, there are a number of factors that can distort the FIT results and lead to interpretation difficulties, particularly when differentiating between cement problems and formation effects. Additionally, the effect of drilling fluid properties can induce inaccuracies in the interpretation of surface-collected data, often resulting in a higher pressure than the correct value. With the advent of data compression and high-speed telemetry technology, downhole pressure profiles can now be acquired with improved resolution. This enhanced data set is essential for robust FIT/LOT interpretation, the accuracy of which is critical for avoiding costly drilling problems. A Gulf of Mexico deepwater case history will be analyzed to display effective ways in which this emerging technology has been successfully implemented. This approach in downhole pressure measurements during FIT/LOT can provide on-demand, high-precision data sets for enhanced interpretation and real-time decision making.