what ecg changes can reduce the specificity of the ett
gina during exercise but no diagnostic ECG changes, or 2) inadequate blood pressure re-sponse (e.g., increase in systolic blood pres-sureG25 mm Hg) in the absence of valvular disease or heart failure, leading to reduced negative predictive value of ETT. 2. Baseline ECG changes leading to reduced specificity (as previously discussed). 3. Rapid resolution of ECG changes. Resolution of exercise-inducedSTsegmentdepressionsinearly recovery (e.g., G 1 min); such changes have re-duced specificity to detect obstructive CAD. 4. Insufficient workload can lead to a lower sen-